TY  - CONF
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Malešević, Aleksandar
AU  - Marinković Stanojević, Zorica
AU  - Počuča-Nešić, Milica
AU  - Mitrović, Jelena
AU  - Rostovtsev, Yuri
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2088
AB  - Numerous methods have been utilized for molecular detection, including optical, calorimetric, acoustic, and techniques based on changes in electrical properties, such as metal oxide semiconductor sensors [1,2]. Recent research endeavors have led to a significant rise in sensitivity, detecting parts per billion (ppb) [3], but the challenges of selectivity and cross-sensing remain crucial areas of investigation. Developing a gas sensor with high selectivity to efficiently analyze multi-gas mixtures would be of great significance, with potential applications in various fields such as technology, environmental control, biology, and medicine.
Quantum sensors are a promising new technology for the detection of gas mixtures. They offer a number of advantages over traditional methods, including high sensitivity, selectivity, and response time. In the presentation, we propose a new method based on the resonant interaction of dipole molecules with ac fields, in the presence of a dc electric and magnetic field that creates Zeeman and Stark splitting of molecular levels specific to certain molecules, ensuring selectivity [4].
In this talk, we present some preliminary experimental results obtained for the molecule NO on the use of quantum sensors for the detection of gas mixtures. Our results demonstrate the potential of quantum sensors for a variety of applications in gas sensing. We believe that quantum sensors have the potential to revolutionize the field of gas sensing.
1. X. Liu, et al. Sensors (Basel), 12 (2012) 9635–9665.
2. S. Lakkis, R. Younes, Y. Alayli, M. Sawan, Sensor Review, 34 (2014) 24–35.
3. J.-H. Lee, J.-Y. Kim, J.-H. Kim, S. S. Kim, Sensors (Basel), 19 (2019) 726.
4. Z. Branković, Y. Rostovtsev, Sci. Rep., 10 (2020) 1537.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Quantum sensors for gas mixture detection
SP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2088
ER  - 

@conference{
author = "Branković, Goran and Branković, Zorica and Vojisavljević, Katarina and Malešević, Aleksandar and Marinković Stanojević, Zorica and Počuča-Nešić, Milica and Mitrović, Jelena and Rostovtsev, Yuri",
year = "2023",
abstract = "Numerous methods have been utilized for molecular detection, including optical, calorimetric, acoustic, and techniques based on changes in electrical properties, such as metal oxide semiconductor sensors [1,2]. Recent research endeavors have led to a significant rise in sensitivity, detecting parts per billion (ppb) [3], but the challenges of selectivity and cross-sensing remain crucial areas of investigation. Developing a gas sensor with high selectivity to efficiently analyze multi-gas mixtures would be of great significance, with potential applications in various fields such as technology, environmental control, biology, and medicine.
Quantum sensors are a promising new technology for the detection of gas mixtures. They offer a number of advantages over traditional methods, including high sensitivity, selectivity, and response time. In the presentation, we propose a new method based on the resonant interaction of dipole molecules with ac fields, in the presence of a dc electric and magnetic field that creates Zeeman and Stark splitting of molecular levels specific to certain molecules, ensuring selectivity [4].
In this talk, we present some preliminary experimental results obtained for the molecule NO on the use of quantum sensors for the detection of gas mixtures. Our results demonstrate the potential of quantum sensors for a variety of applications in gas sensing. We believe that quantum sensors have the potential to revolutionize the field of gas sensing.
1. X. Liu, et al. Sensors (Basel), 12 (2012) 9635–9665.
2. S. Lakkis, R. Younes, Y. Alayli, M. Sawan, Sensor Review, 34 (2014) 24–35.
3. J.-H. Lee, J.-Y. Kim, J.-H. Kim, S. S. Kim, Sensors (Basel), 19 (2019) 726.
4. Z. Branković, Y. Rostovtsev, Sci. Rep., 10 (2020) 1537.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Quantum sensors for gas mixture detection",
pages = "43",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2088"
}

Branković, G., Branković, Z., Vojisavljević, K., Malešević, A., Marinković Stanojević, Z., Počuča-Nešić, M., Mitrović, J.,& Rostovtsev, Y.. (2023). Quantum sensors for gas mixture detection. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 43.
https://hdl.handle.net/21.15107/rcub_rimsi_2088

Branković G, Branković Z, Vojisavljević K, Malešević A, Marinković Stanojević Z, Počuča-Nešić M, Mitrović J, Rostovtsev Y. Quantum sensors for gas mixture detection. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:43.
https://hdl.handle.net/21.15107/rcub_rimsi_2088 .

Branković, Goran, Branković, Zorica, Vojisavljević, Katarina, Malešević, Aleksandar, Marinković Stanojević, Zorica, Počuča-Nešić, Milica, Mitrović, Jelena, Rostovtsev, Yuri, "Quantum sensors for gas mixture detection" in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):43,
https://hdl.handle.net/21.15107/rcub_rimsi_2088 .

TY  - GEN
AU  - Mitrović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Malešević, Aleksandar
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Savić, Slavica
AU  - Ribić, Vesna
AU  - Drev, Sandra
AU  - Podlogar, Matejka
AU  - Bernik, Slavko
AU  - Rapljenović, Željko
AU  - Ivek, Tomislav
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2085
AB  - The non-magnetic, non-inductive electroconductive materials with linear current-voltage characteristic and low and almost constant electrical resistivity in the wide temperature range could be used in conditions unfavorable for metals and alloys. Particular emphasis is placed on the performance and endurance of these materials in conditions at constant high voltage, current, and energy, as well as operating in acidic and humid environmental conditions.
The aim of this work was to investigate the influence of antimony concentration and sintering parameters on the structure, microstructure, and electrical properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I- U) characteristics and low electrical resistivity. For this purpose three different sintering techniques were used: conventional, spark plasma and cold sintering.
According to the X-ray diffraction (XRD) analysis, single-phase ceramic mater- ials with cubic BaSnO3 structure were obtained by conventional sintering at 1600 °C for 3 h and spark plasma sintering at 1100 °C for 5 min. Raising the spark plasma sintering temperature to 1200 °C induced the formation of Ba-rich secondary phase, Ba2SnO4. XRD analysis confirmed the presence of unreacted SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). Scanning electron microscopy (SEM) indicates a significant decrease in grain size upon doping, regardless of the sintering technique. High-resolution transmission electron microscopy (HRTEM) revealed the presence of low angle grain boundaries (LAGBs) in conventionally and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of electrical measurements confirmed the semiconducting properties of all BSSO, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. This sample showed linear current-voltage characteristic, the lowest and almost constant electrical resistivity in the temperature range of 25–150
°C resulting from the loss of potential barriers at grain boundaries due to the large fraction of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.
PB  - University of Belgrade, Institute for Multidisciplinary Research
T2  - 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
T1  - Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics
SP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2085
ER  - 

@misc{
author = "Mitrović, Jelena and Počuča-Nešić, Milica and Malešević, Aleksandar and Branković, Zorica and Vojisavljević, Katarina and Savić, Slavica and Ribić, Vesna and Drev, Sandra and Podlogar, Matejka and Bernik, Slavko and Rapljenović, Željko and Ivek, Tomislav and Branković, Goran",
year = "2023",
abstract = "The non-magnetic, non-inductive electroconductive materials with linear current-voltage characteristic and low and almost constant electrical resistivity in the wide temperature range could be used in conditions unfavorable for metals and alloys. Particular emphasis is placed on the performance and endurance of these materials in conditions at constant high voltage, current, and energy, as well as operating in acidic and humid environmental conditions.
The aim of this work was to investigate the influence of antimony concentration and sintering parameters on the structure, microstructure, and electrical properties of antimony-doped barium stannate, BaSn1-xSbxO3 (BSSO, x = 0,00; 0,04; 0,06; 0,08 and 0,10) to obtain conductive electroceramic samples with linear current-voltage (I- U) characteristics and low electrical resistivity. For this purpose three different sintering techniques were used: conventional, spark plasma and cold sintering.
According to the X-ray diffraction (XRD) analysis, single-phase ceramic mater- ials with cubic BaSnO3 structure were obtained by conventional sintering at 1600 °C for 3 h and spark plasma sintering at 1100 °C for 5 min. Raising the spark plasma sintering temperature to 1200 °C induced the formation of Ba-rich secondary phase, Ba2SnO4. XRD analysis confirmed the presence of unreacted SnO2 and BaCO3 in cold sintered BaSn0.92Sb0.08O3 sample (310 °C for 5 min, 20 wt.% 1 M acetic acid). Scanning electron microscopy (SEM) indicates a significant decrease in grain size upon doping, regardless of the sintering technique. High-resolution transmission electron microscopy (HRTEM) revealed the presence of low angle grain boundaries (LAGBs) in conventionally and spark plasma sintered (1200 °C for 5 min) samples with x = 0.08. The results of electrical measurements confirmed the semiconducting properties of all BSSO, except the spark plasma sintered BaSn0.92Sb0.08O3 (1200 °C for 5 min) sample. This sample showed linear current-voltage characteristic, the lowest and almost constant electrical resistivity in the temperature range of 25–150
°C resulting from the loss of potential barriers at grain boundaries due to the large fraction of LAGBs present in BaSn0.92Sb0.08O3 ceramic sample.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia",
title = "Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics",
pages = "36",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2085"
}

Mitrović, J., Počuča-Nešić, M., Malešević, A., Branković, Z., Vojisavljević, K., Savić, S., Ribić, V., Drev, S., Podlogar, M., Bernik, S., Rapljenović, Ž., Ivek, T.,& Branković, G.. (2023). Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 36.
https://hdl.handle.net/21.15107/rcub_rimsi_2085

Mitrović J, Počuča-Nešić M, Malešević A, Branković Z, Vojisavljević K, Savić S, Ribić V, Drev S, Podlogar M, Bernik S, Rapljenović Ž, Ivek T, Branković G. Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics. in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia. 2023;:36.
https://hdl.handle.net/21.15107/rcub_rimsi_2085 .

Mitrović, Jelena, Počuča-Nešić, Milica, Malešević, Aleksandar, Branković, Zorica, Vojisavljević, Katarina, Savić, Slavica, Ribić, Vesna, Drev, Sandra, Podlogar, Matejka, Bernik, Slavko, Rapljenović, Željko, Ivek, Tomislav, Branković, Goran, "Correlation between the microstructure and electrical properties of Sb-doped BaSnO3 ceramics" in 7th Conference of the Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023, Belgrade, Serbia (2023):36,
https://hdl.handle.net/21.15107/rcub_rimsi_2085 .

TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Savić, Slavica M.
AU  - Počuča-Nešić, Milica
AU  - Hodžić, Aden
AU  - Kriechbaum, Manfred
AU  - Ribić, Vesna
AU  - Rečnik, Aleksander
AU  - Mitrović, Jelena
AU  - Branković, Goran
AU  - Djokic, Veljko
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1860
AB  - Developing highly efficient semiconductor metal oxide (SMOX) sensors capable of accurate and fast responses to environmental humidity is still a challenging task. In addition to a not so pronounced sensitivity to relative humidity change, most of the SMOXs cannot meet the criteria of real-time humidity sensing due to their long response/recovery time. The way to tackle this problem is to control adsorption/desorption processes, i.e., water-vapor molecular dynamics, over the sensor’s active layer through the powder and pore morphology design. With this in mind, a KIT-5-mediated synthesis was used to achieve mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering through template inversion and compared with a sol-gel synthesized powder (SnO2-SG). Unlike SnO2-SG, SnO2-R possessed a high specific surface area and quite an open pore structure, similar to the KIT-5, as observed by TEM, BET and SWAXS analyses. According to TEM, SnO2-R consisted of fine-grained globular particles and some percent of exaggerated, grown twinned crystals. The distinctive morphology of the SnO2-R-based sensor, with its specific pore structure and an increased number of oxygen-related defects associated with the powder preparation process and detected at the sensor surface by XPS analysis, contributed to excellent humidity sensing performances at room temperature, comprised of a low hysteresis error (3.7%), sensitivity of 406.8 kΩ/RH% and swift response/recovery speed (4 s/6 s).
PB  - MDPI
T2  - Molecules
T1  - KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed
IS  - 4
SP  - 1754
VL  - 28
DO  - 10.3390/molecules28041754
ER  - 

@article{
author = "Vojisavljević, Katarina and Savić, Slavica M. and Počuča-Nešić, Milica and Hodžić, Aden and Kriechbaum, Manfred and Ribić, Vesna and Rečnik, Aleksander and Mitrović, Jelena and Branković, Goran and Djokic, Veljko",
year = "2023",
abstract = "Developing highly efficient semiconductor metal oxide (SMOX) sensors capable of accurate and fast responses to environmental humidity is still a challenging task. In addition to a not so pronounced sensitivity to relative humidity change, most of the SMOXs cannot meet the criteria of real-time humidity sensing due to their long response/recovery time. The way to tackle this problem is to control adsorption/desorption processes, i.e., water-vapor molecular dynamics, over the sensor’s active layer through the powder and pore morphology design. With this in mind, a KIT-5-mediated synthesis was used to achieve mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering through template inversion and compared with a sol-gel synthesized powder (SnO2-SG). Unlike SnO2-SG, SnO2-R possessed a high specific surface area and quite an open pore structure, similar to the KIT-5, as observed by TEM, BET and SWAXS analyses. According to TEM, SnO2-R consisted of fine-grained globular particles and some percent of exaggerated, grown twinned crystals. The distinctive morphology of the SnO2-R-based sensor, with its specific pore structure and an increased number of oxygen-related defects associated with the powder preparation process and detected at the sensor surface by XPS analysis, contributed to excellent humidity sensing performances at room temperature, comprised of a low hysteresis error (3.7%), sensitivity of 406.8 kΩ/RH% and swift response/recovery speed (4 s/6 s).",
publisher = "MDPI",
journal = "Molecules",
title = "KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed",
number = "4",
pages = "1754",
volume = "28",
doi = "10.3390/molecules28041754"
}

Vojisavljević, K., Savić, S. M., Počuča-Nešić, M., Hodžić, A., Kriechbaum, M., Ribić, V., Rečnik, A., Mitrović, J., Branković, G.,& Djokic, V.. (2023). KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed. in Molecules
MDPI., 28(4), 1754.
https://doi.org/10.3390/molecules28041754

Vojisavljević K, Savić SM, Počuča-Nešić M, Hodžić A, Kriechbaum M, Ribić V, Rečnik A, Mitrović J, Branković G, Djokic V. KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed. in Molecules. 2023;28(4):1754.
doi:10.3390/molecules28041754 .

Vojisavljević, Katarina, Savić, Slavica M., Počuča-Nešić, Milica, Hodžić, Aden, Kriechbaum, Manfred, Ribić, Vesna, Rečnik, Aleksander, Mitrović, Jelena, Branković, Goran, Djokic, Veljko, "KIT-5-Assisted Synthesis of Mesoporous SnO2 for High-Performance Humidity Sensors with a Swift Response/Recovery Speed" in Molecules, 28, no. 4 (2023):1754,
https://doi.org/10.3390/molecules28041754 . .

TY  - JOUR
AU  - Prokopijević, Miloš
AU  - Simonović Radosavljević, Jasna
AU  - Spasojević, Dragica
AU  - Vojisavljević, Katarina
AU  - Radotić, Ksenija
AU  - Mitrović, Aleksandra Lj.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1773
AB  - Leaning stems of woody plants form reaction wood, in hardwood trees termed tension wood (TW). Typical TW fibers, gelatinous fibers (G-fibers), are characterized by an inner gelatinous cell wall layer (G-layer). Xyloglucan endotransglycosylases (XETs) was proposed as the essential enzyme in cell wall modifications in TW, by making xyloglucan (XG) cross-links between G- and S2-layers in G-fibers, and thus maintaining their contact. The etermination of TW presence in a sample is of great importance for the forest products industry, biofuel production, and tree physiology studies. However, TW is not easy to detect visually. The colorimetric assay for XET activity determination as an indicator of TW presence in a sample was tested on powdered stem segments of juvenile Populus x euramericana trees exposed to severe long-term static bending. In parallel, histochemical and ultrastructural characterization of stem samples of bent and control trees was performed. The tested colorimetric assay for XET activity determination could be suggested as a useful and easily applicable tool for fast screening of powdered wood samples for the presence of TW.
PB  - De Gruyter
T2  - Holzforschung
T1  - XET activity determination in powdered wood samples as an indicator of tension wood, tested on juvenile Populus x euramericana exposed to severe long-term static bending
EP  - 2505
IS  - 6
SP  - 2500
VL  - 76
DO  - 10.1515/hf-2021-0223
ER  - 

@article{
author = "Prokopijević, Miloš and Simonović Radosavljević, Jasna and Spasojević, Dragica and Vojisavljević, Katarina and Radotić, Ksenija and Mitrović, Aleksandra Lj.",
year = "2022",
abstract = "Leaning stems of woody plants form reaction wood, in hardwood trees termed tension wood (TW). Typical TW fibers, gelatinous fibers (G-fibers), are characterized by an inner gelatinous cell wall layer (G-layer). Xyloglucan endotransglycosylases (XETs) was proposed as the essential enzyme in cell wall modifications in TW, by making xyloglucan (XG) cross-links between G- and S2-layers in G-fibers, and thus maintaining their contact. The etermination of TW presence in a sample is of great importance for the forest products industry, biofuel production, and tree physiology studies. However, TW is not easy to detect visually. The colorimetric assay for XET activity determination as an indicator of TW presence in a sample was tested on powdered stem segments of juvenile Populus x euramericana trees exposed to severe long-term static bending. In parallel, histochemical and ultrastructural characterization of stem samples of bent and control trees was performed. The tested colorimetric assay for XET activity determination could be suggested as a useful and easily applicable tool for fast screening of powdered wood samples for the presence of TW.",
publisher = "De Gruyter",
journal = "Holzforschung",
title = "XET activity determination in powdered wood samples as an indicator of tension wood, tested on juvenile Populus x euramericana exposed to severe long-term static bending",
pages = "2505-2500",
number = "6",
volume = "76",
doi = "10.1515/hf-2021-0223"
}

Prokopijević, M., Simonović Radosavljević, J., Spasojević, D., Vojisavljević, K., Radotić, K.,& Mitrović, A. Lj.. (2022). XET activity determination in powdered wood samples as an indicator of tension wood, tested on juvenile Populus x euramericana exposed to severe long-term static bending. in Holzforschung
De Gruyter., 76(6), 2500-2505.
https://doi.org/10.1515/hf-2021-0223

Prokopijević M, Simonović Radosavljević J, Spasojević D, Vojisavljević K, Radotić K, Mitrović AL. XET activity determination in powdered wood samples as an indicator of tension wood, tested on juvenile Populus x euramericana exposed to severe long-term static bending. in Holzforschung. 2022;76(6):2500-2505.
doi:10.1515/hf-2021-0223 .

Prokopijević, Miloš, Simonović Radosavljević, Jasna, Spasojević, Dragica, Vojisavljević, Katarina, Radotić, Ksenija, Mitrović, Aleksandra Lj., "XET activity determination in powdered wood samples as an indicator of tension wood, tested on juvenile Populus x euramericana exposed to severe long-term static bending" in Holzforschung, 76, no. 6 (2022):2500-2505,
https://doi.org/10.1515/hf-2021-0223 . .

TY  - CONF
AU  - Janošević, Dušica
AU  - Vojisavljević, Katarina
AU  - Pecinar, Ilinka
AU  - Mitrović, Aleksandra Lj.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1812
AB  - The plant cell wall (CW) is a cell compartment lying outside the plasma
membrane forming a continuum throughout the plant body. The composition of
CWs varies between plant species and cell types, while changes in CW constituents
occur as a result of growth and developmental processes, or as a response to various
environmental stimuli. In the herein study, we present a selection of microscopic
methods for rapid, relatively simple, and low-cost visualization of CW
structure/composition in tissues of stems in trees, shrubs, or herbs. Selected
microscopic methods imply the use of unfixed, intact, both fresh and dried, plant
tissues for the analysis, as well as free-hand or microtome sectioning. UV
microscopy, phloroglucinol-HCl and toluidine blue O staining, SEM microscopy,
and RAMAN microspectroscopy, separately or in combination, can provide valuable
information in plant ecology, plant physiology studies, or for applications in
agronomy and forest products industry. As a model, stem samples of juvenile
Populus x euramericana trees exposed to severe long term static bending were
selected: tension wood fibers (gelatinous fibers, specialized sclerenchyma cells)
could be considered as representatives of CWs with the most complex structure,
while the genus Populus is considered as a model woody Angiosperm.
PB  - Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš Institute for Nature Conservation of Serbia
C3  - 14 th Symposium on the Flora of Southeastern Serbia and Neighboring Regions Kladovo, 26 th to 29 thJune, 2022
T1  - Populus x euramericana tension wood as a model for selection of microscopic methods for rapid screening of cell wall structure in the analysis of plant stem properties
SP  - 201
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1812
ER  - 

@conference{
author = "Janošević, Dušica and Vojisavljević, Katarina and Pecinar, Ilinka and Mitrović, Aleksandra Lj.",
year = "2022",
abstract = "The plant cell wall (CW) is a cell compartment lying outside the plasma
membrane forming a continuum throughout the plant body. The composition of
CWs varies between plant species and cell types, while changes in CW constituents
occur as a result of growth and developmental processes, or as a response to various
environmental stimuli. In the herein study, we present a selection of microscopic
methods for rapid, relatively simple, and low-cost visualization of CW
structure/composition in tissues of stems in trees, shrubs, or herbs. Selected
microscopic methods imply the use of unfixed, intact, both fresh and dried, plant
tissues for the analysis, as well as free-hand or microtome sectioning. UV
microscopy, phloroglucinol-HCl and toluidine blue O staining, SEM microscopy,
and RAMAN microspectroscopy, separately or in combination, can provide valuable
information in plant ecology, plant physiology studies, or for applications in
agronomy and forest products industry. As a model, stem samples of juvenile
Populus x euramericana trees exposed to severe long term static bending were
selected: tension wood fibers (gelatinous fibers, specialized sclerenchyma cells)
could be considered as representatives of CWs with the most complex structure,
while the genus Populus is considered as a model woody Angiosperm.",
publisher = "Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš Institute for Nature Conservation of Serbia",
journal = "14 th Symposium on the Flora of Southeastern Serbia and Neighboring Regions Kladovo, 26 th to 29 thJune, 2022",
title = "Populus x euramericana tension wood as a model for selection of microscopic methods for rapid screening of cell wall structure in the analysis of plant stem properties",
pages = "201",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1812"
}

Janošević, D., Vojisavljević, K., Pecinar, I.,& Mitrović, A. Lj.. (2022). Populus x euramericana tension wood as a model for selection of microscopic methods for rapid screening of cell wall structure in the analysis of plant stem properties. in 14 th Symposium on the Flora of Southeastern Serbia and Neighboring Regions Kladovo, 26 th to 29 thJune, 2022
Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš Institute for Nature Conservation of Serbia., 201.
https://hdl.handle.net/21.15107/rcub_rimsi_1812

Janošević D, Vojisavljević K, Pecinar I, Mitrović AL. Populus x euramericana tension wood as a model for selection of microscopic methods for rapid screening of cell wall structure in the analysis of plant stem properties. in 14 th Symposium on the Flora of Southeastern Serbia and Neighboring Regions Kladovo, 26 th to 29 thJune, 2022. 2022;:201.
https://hdl.handle.net/21.15107/rcub_rimsi_1812 .

Janošević, Dušica, Vojisavljević, Katarina, Pecinar, Ilinka, Mitrović, Aleksandra Lj., "Populus x euramericana tension wood as a model for selection of microscopic methods for rapid screening of cell wall structure in the analysis of plant stem properties" in 14 th Symposium on the Flora of Southeastern Serbia and Neighboring Regions Kladovo, 26 th to 29 thJune, 2022 (2022):201,
https://hdl.handle.net/21.15107/rcub_rimsi_1812 .

TY  - CONF
AU  - Počuča-Nešić, Milica
AU  - Vukašinović, Jelena
AU  - Dapčević, Aleksandra
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Vojisavljević, Katarina
AU  - Marinković Stanojević, Zorica
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2031
AB  - Dyes released from textile industries present a big threat to the environment, and
remediation of wastewaters became one of the major scientific challenges. In recent
years, there has been a great need for catalysts that would oxidize pollutants under
dark ambient conditions without the use of external stimulants like light,
temperature, or additional chemicals such as O3, H2O2. Efficient work of these
catalysts would significantly reduce the energy consumption. Among other
materials, perovskite-type oxides with general formula ABO3 emerged as possible
catalysts for dye degradation in the dark conditions. Lanthanum nickelates with
single (LaNiO3) and layered perovskite structure (La4Ni3O10, La3Ni2O7, La2NiO4)
showed good catalytic properties, due to the existence of nickel in two oxidation
states (Ni2+ and Ni3+) and the oxygen non-stoichiometry in these materials [1].
This study presents structural, microstructural and catalytic properties of the
LaNi1-xNbxO3-based (xNb = 0.000, 0,005 and 0,010; La-Ni-Nb-O) powders prepared
by mechanical activation method. The XRD (X-Ray Diffraction) analysis revealed
the existence of a multiphase oxide system, including layered structures of
nickelates Lan+1NinO3n+1 (n = 3, 2, 1, 0) and NiO phase in all La-Ni-Nb-O-based
powders. Also, the HRTEM (High Resolution Transmission Electron Microscopy)
analysis confirmed the presence of structural polytypes in these powders. The
catalytic properties of La-Ni-Nb-O-based powders were investigated by degradation
of the anionic azo dye, Reactive Orange 16 (RO16), under dark ambient conditions
at different pH values (3, 6.5, 9.5 and 11) and temperature of 20 °C. The best
catalytic efficiency in the degradation of RO16 dye showed the sample with x(Nb) =
0.010 in acidic solution, where the residual of RO16 dye was about 4.5 % after 330
minutes. The reusability test for this powder in degradation process of RO16 dye
showed that the sample with x(Nb) = 0.010 retained its catalytic activity during three
cycles.
1. W. Zhong et al., Appl. Catal. A, Gen., 549 (2018) 302.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2031
ER  - 

@conference{
author = "Počuča-Nešić, Milica and Vukašinović, Jelena and Dapčević, Aleksandra and Ribić, Vesna and Branković, Zorica and Vojisavljević, Katarina and Marinković Stanojević, Zorica and Branković, Goran",
year = "2022",
abstract = "Dyes released from textile industries present a big threat to the environment, and
remediation of wastewaters became one of the major scientific challenges. In recent
years, there has been a great need for catalysts that would oxidize pollutants under
dark ambient conditions without the use of external stimulants like light,
temperature, or additional chemicals such as O3, H2O2. Efficient work of these
catalysts would significantly reduce the energy consumption. Among other
materials, perovskite-type oxides with general formula ABO3 emerged as possible
catalysts for dye degradation in the dark conditions. Lanthanum nickelates with
single (LaNiO3) and layered perovskite structure (La4Ni3O10, La3Ni2O7, La2NiO4)
showed good catalytic properties, due to the existence of nickel in two oxidation
states (Ni2+ and Ni3+) and the oxygen non-stoichiometry in these materials [1].
This study presents structural, microstructural and catalytic properties of the
LaNi1-xNbxO3-based (xNb = 0.000, 0,005 and 0,010; La-Ni-Nb-O) powders prepared
by mechanical activation method. The XRD (X-Ray Diffraction) analysis revealed
the existence of a multiphase oxide system, including layered structures of
nickelates Lan+1NinO3n+1 (n = 3, 2, 1, 0) and NiO phase in all La-Ni-Nb-O-based
powders. Also, the HRTEM (High Resolution Transmission Electron Microscopy)
analysis confirmed the presence of structural polytypes in these powders. The
catalytic properties of La-Ni-Nb-O-based powders were investigated by degradation
of the anionic azo dye, Reactive Orange 16 (RO16), under dark ambient conditions
at different pH values (3, 6.5, 9.5 and 11) and temperature of 20 °C. The best
catalytic efficiency in the degradation of RO16 dye showed the sample with x(Nb) =
0.010 in acidic solution, where the residual of RO16 dye was about 4.5 % after 330
minutes. The reusability test for this powder in degradation process of RO16 dye
showed that the sample with x(Nb) = 0.010 retained its catalytic activity during three
cycles.
1. W. Zhong et al., Appl. Catal. A, Gen., 549 (2018) 302.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2031"
}

Počuča-Nešić, M., Vukašinović, J., Dapčević, A., Ribić, V., Branković, Z., Vojisavljević, K., Marinković Stanojević, Z.,& Branković, G.. (2022). The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 63.
https://hdl.handle.net/21.15107/rcub_rimsi_2031

Počuča-Nešić M, Vukašinović J, Dapčević A, Ribić V, Branković Z, Vojisavljević K, Marinković Stanojević Z, Branković G. The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:63.
https://hdl.handle.net/21.15107/rcub_rimsi_2031 .

Počuča-Nešić, Milica, Vukašinović, Jelena, Dapčević, Aleksandra, Ribić, Vesna, Branković, Zorica, Vojisavljević, Katarina, Marinković Stanojević, Zorica, Branković, Goran, "The catalytic degradation of RO16 dye under dark ambient conditions using La-Ni-Nb-O-based powders" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):63,
https://hdl.handle.net/21.15107/rcub_rimsi_2031 .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Savic, Slavica
AU  - Podlogar, Matejka
AU  - Zemljak, Olivera
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2038
AB  - Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2-
MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining
electrospinning technique and hydrothermal method. A solution containing
uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a
sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to
fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at
550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP
were formed and used as backbones for further hydrothermal growth of ZnO-NRs.
By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of
SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine,
HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were
controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed
by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM),
energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and
elemental mapping analysis. 
The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed:
a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between
SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in
ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length
attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2
crystallites (~5 nm in size) and where the four porous channels create the core
instead of SiO2. Photocatalytic performance of the heterostructures was investigated
toward different organic azo-dyes (methylene blue, methyl orange) and obvious
enhancement was demonstrated in degradation of the organic pollutant, compared to
primary SnO2-based nanofibers.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances
SP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2038
ER  - 

@conference{
author = "Vojisavljević, Katarina and Vukašinović, Jelena and Počuča-Nešić, Milica and Savic, Slavica and Podlogar, Matejka and Zemljak, Olivera and Branković, Zorica",
year = "2022",
abstract = "Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2-
MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining
electrospinning technique and hydrothermal method. A solution containing
uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a
sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to
fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at
550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP
were formed and used as backbones for further hydrothermal growth of ZnO-NRs.
By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of
SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine,
HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were
controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed
by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM),
energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and
elemental mapping analysis. 
The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed:
a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between
SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in
ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length
attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2
crystallites (~5 nm in size) and where the four porous channels create the core
instead of SiO2. Photocatalytic performance of the heterostructures was investigated
toward different organic azo-dyes (methylene blue, methyl orange) and obvious
enhancement was demonstrated in degradation of the organic pollutant, compared to
primary SnO2-based nanofibers.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances",
pages = "51",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2038"
}

Vojisavljević, K., Vukašinović, J., Počuča-Nešić, M., Savic, S., Podlogar, M., Zemljak, O.,& Branković, Z.. (2022). Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 51.
https://hdl.handle.net/21.15107/rcub_rimsi_2038

Vojisavljević K, Vukašinović J, Počuča-Nešić M, Savic S, Podlogar M, Zemljak O, Branković Z. Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:51.
https://hdl.handle.net/21.15107/rcub_rimsi_2038 .

Vojisavljević, Katarina, Vukašinović, Jelena, Počuča-Nešić, Milica, Savic, Slavica, Podlogar, Matejka, Zemljak, Olivera, Branković, Zorica, "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):51,
https://hdl.handle.net/21.15107/rcub_rimsi_2038 .

TY  - JOUR
AU  - Miličević, Ivana
AU  - Hadzima-Nyarko, Marijana
AU  - Bušić, Robert
AU  - Simonović Radosavljević, Jasna
AU  - Prokopijević, Miloš
AU  - Vojisavljević, Katarina
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1805
AB  - This paper investigates the effects of different
treatment methods of rubber aggregates for self-compacting concrete
(SCC) on compressive strength and modulus of elasticity. SCC
mixtures with 10% replacement of fine aggregate with crumb rubber
by total aggregate volume and with different aggregate treatment
methods were investigated. The rubber aggregate was treated in three
different methods: dry process, water-soaking, and NaOH treatment
plus water soaking. Properties of SCC in a fresh and hardened state
were tested and evaluated. Scanning electron microscope (SEM)
analysis of three different SCC patches were made and discussed. It
was observed that applying the proposed NaOH plus water soaking
method resulted in the improvement of fresh and hardened concrete
properties. It resulted in a more uniform distribution of rubber
particles in the cement matrix, a better bond between rubber particles
and the cement matrix, and higher compressive strength of SCC
rubberized concrete.
PB  - World Academy of Science, Engineering and Technology
T2  - International Journal of Structural and Construction Engineering
T1  - Effect of rubber treatment on compressive strength and modulus of elasticity of self- compacting rubberized concrete
EP  - 134
IS  - 3
SP  - 131
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1805
ER  - 

@article{
author = "Miličević, Ivana and Hadzima-Nyarko, Marijana and Bušić, Robert and Simonović Radosavljević, Jasna and Prokopijević, Miloš and Vojisavljević, Katarina",
year = "2021",
abstract = "This paper investigates the effects of different
treatment methods of rubber aggregates for self-compacting concrete
(SCC) on compressive strength and modulus of elasticity. SCC
mixtures with 10% replacement of fine aggregate with crumb rubber
by total aggregate volume and with different aggregate treatment
methods were investigated. The rubber aggregate was treated in three
different methods: dry process, water-soaking, and NaOH treatment
plus water soaking. Properties of SCC in a fresh and hardened state
were tested and evaluated. Scanning electron microscope (SEM)
analysis of three different SCC patches were made and discussed. It
was observed that applying the proposed NaOH plus water soaking
method resulted in the improvement of fresh and hardened concrete
properties. It resulted in a more uniform distribution of rubber
particles in the cement matrix, a better bond between rubber particles
and the cement matrix, and higher compressive strength of SCC
rubberized concrete.",
publisher = "World Academy of Science, Engineering and Technology",
journal = "International Journal of Structural and Construction Engineering",
title = "Effect of rubber treatment on compressive strength and modulus of elasticity of self- compacting rubberized concrete",
pages = "134-131",
number = "3",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1805"
}

Miličević, I., Hadzima-Nyarko, M., Bušić, R., Simonović Radosavljević, J., Prokopijević, M.,& Vojisavljević, K.. (2021). Effect of rubber treatment on compressive strength and modulus of elasticity of self- compacting rubberized concrete. in International Journal of Structural and Construction Engineering
World Academy of Science, Engineering and Technology., 15(3), 131-134.
https://hdl.handle.net/21.15107/rcub_rimsi_1805

Miličević I, Hadzima-Nyarko M, Bušić R, Simonović Radosavljević J, Prokopijević M, Vojisavljević K. Effect of rubber treatment on compressive strength and modulus of elasticity of self- compacting rubberized concrete. in International Journal of Structural and Construction Engineering. 2021;15(3):131-134.
https://hdl.handle.net/21.15107/rcub_rimsi_1805 .

Miličević, Ivana, Hadzima-Nyarko, Marijana, Bušić, Robert, Simonović Radosavljević, Jasna, Prokopijević, Miloš, Vojisavljević, Katarina, "Effect of rubber treatment on compressive strength and modulus of elasticity of self- compacting rubberized concrete" in International Journal of Structural and Construction Engineering, 15, no. 3 (2021):131-134,
https://hdl.handle.net/21.15107/rcub_rimsi_1805 .

TY  - CONF
AU  - Miličević, Ivana
AU  - Hadzima-Nyarko, Marijana
AU  - Bušić, Robert
AU  - Simonović Radosavljević, Jasna
AU  - Prokopijević, Miloš
AU  - Vojisavljević, Katarina
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1797
AB  - This paper investigates the effects of different
treatment methods of rubber aggregates for self-compacting concrete
(SCC) on compressive strength and modulus of elasticity. SCC
mixtures with 10% replacement of fine aggregate with crumb rubber
by total aggregate volume and with different aggregate treatment
methods were investigated. The rubber aggregate was treated in three
different methods: dry process, water-soaking, and NaOH treatment
plus water soaking. Properties of SCC in a fresh and hardened state
were tested and evaluated. Scanning electron microscope (SEM)
analysis of three different SCC patches were made and discussed. It
was observed that applying the proposed NaOH plus water soaking
method resulted in the improvement of fresh and hardened concrete
properties. It resulted in a more uniform distribution of rubber particles
in the cement matrix, a better bond between rubber particles and the
cement matrix, and higher compressive strength of SCC rubberized
concrete.
PB  - World Academy of Science, Engineering and Technology
C3  - ICACM 2021 - 15. International Conference on Advanced Construction Materials, Part VIII, April 19-20, 2021, Paris, France
T1  - Effect of Rubber Treatment on Compressive Strength and Modulus of Elasticity of Self-Compacting Rubberized Concrete
EP  - 654
SP  - 651
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1797
ER  - 

@conference{
author = "Miličević, Ivana and Hadzima-Nyarko, Marijana and Bušić, Robert and Simonović Radosavljević, Jasna and Prokopijević, Miloš and Vojisavljević, Katarina",
year = "2021",
abstract = "This paper investigates the effects of different
treatment methods of rubber aggregates for self-compacting concrete
(SCC) on compressive strength and modulus of elasticity. SCC
mixtures with 10% replacement of fine aggregate with crumb rubber
by total aggregate volume and with different aggregate treatment
methods were investigated. The rubber aggregate was treated in three
different methods: dry process, water-soaking, and NaOH treatment
plus water soaking. Properties of SCC in a fresh and hardened state
were tested and evaluated. Scanning electron microscope (SEM)
analysis of three different SCC patches were made and discussed. It
was observed that applying the proposed NaOH plus water soaking
method resulted in the improvement of fresh and hardened concrete
properties. It resulted in a more uniform distribution of rubber particles
in the cement matrix, a better bond between rubber particles and the
cement matrix, and higher compressive strength of SCC rubberized
concrete.",
publisher = "World Academy of Science, Engineering and Technology",
journal = "ICACM 2021 - 15. International Conference on Advanced Construction Materials, Part VIII, April 19-20, 2021, Paris, France",
title = "Effect of Rubber Treatment on Compressive Strength and Modulus of Elasticity of Self-Compacting Rubberized Concrete",
pages = "654-651",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1797"
}

Miličević, I., Hadzima-Nyarko, M., Bušić, R., Simonović Radosavljević, J., Prokopijević, M.,& Vojisavljević, K.. (2021). Effect of Rubber Treatment on Compressive Strength and Modulus of Elasticity of Self-Compacting Rubberized Concrete. in ICACM 2021 - 15. International Conference on Advanced Construction Materials, Part VIII, April 19-20, 2021, Paris, France
World Academy of Science, Engineering and Technology., 651-654.
https://hdl.handle.net/21.15107/rcub_rimsi_1797

Miličević I, Hadzima-Nyarko M, Bušić R, Simonović Radosavljević J, Prokopijević M, Vojisavljević K. Effect of Rubber Treatment on Compressive Strength and Modulus of Elasticity of Self-Compacting Rubberized Concrete. in ICACM 2021 - 15. International Conference on Advanced Construction Materials, Part VIII, April 19-20, 2021, Paris, France. 2021;:651-654.
https://hdl.handle.net/21.15107/rcub_rimsi_1797 .

Miličević, Ivana, Hadzima-Nyarko, Marijana, Bušić, Robert, Simonović Radosavljević, Jasna, Prokopijević, Miloš, Vojisavljević, Katarina, "Effect of Rubber Treatment on Compressive Strength and Modulus of Elasticity of Self-Compacting Rubberized Concrete" in ICACM 2021 - 15. International Conference on Advanced Construction Materials, Part VIII, April 19-20, 2021, Paris, France (2021):651-654,
https://hdl.handle.net/21.15107/rcub_rimsi_1797 .

TY  - JOUR
AU  - Bulajic, Dragica V.
AU  - Drljaca, Jovana
AU  - Capo, Ivan
AU  - Savić, Slavica M.
AU  - Vojisavljević, Katarina
AU  - Hodzic, Aden
AU  - Sekulic, Slobodan
AU  - Bajkin, Branislav V.
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1474
AB  - In the present work, a biomaterial (SBA-16/HA) based on the growth of hydroxyapatite (HA) particles within an organized silica structure SBA-16 (Santa Barbara Amorphous-16) was developed to evaluate its application to act as a porous microenvironment promoting attachment and viability of human dental pulp stem cells of healthy deciduous teeth (SHED). First, SHED were isolated and their phenotypes were evaluated by flow cytometry. The samples of SBA-16/HA were characterized by X-ray diffraction (XRD), small and wide angle X-ray scattering (SWAXS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive spectra detector (EDS). Afterward, cells were cultured in the eluates of the above-mentioned biomaterial aged for 24 hr, 7. and 14 days. Bio-Oss (R) and dentin particles are involved for comparison and cells are cultured in the eluates of these two materials also. Thiazolyl Blue Tetrazolium bromide assay-MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide assay) was used for the determination of cell viability. The results obtained by all aforementioned characterization methods of SBA-16/HA, revealed a uniform spherical mesoporous structure, an intrinsic characteristic of this material. This material displayed excellent biocompatibility on SHEDs, and even proliferative potential, indicating that SBA-16/HA could potentially serve as a suitable substrate for bone regeneration. Contrary to SBA-16/HA, dentin particles showed low cytotoxicity at all time points, compared to control and Bio-Oss (R) groups. Our results substantiate the idea that SBA-16/HA has a beneficial effect on SHEDs, thus paving the way toward developing new material for bone replacement.
PB  - Wiley, Hoboken
T2  - Microscopy Research and Technique
T1  - Biocompatibility of mesoporous SBA-16/hydroxyapatite nanocomposite and dentin demineralized particles on human dental pulp stem cells
DO  - 10.1002/jemt.24017
ER  - 

@article{
author = "Bulajic, Dragica V. and Drljaca, Jovana and Capo, Ivan and Savić, Slavica M. and Vojisavljević, Katarina and Hodzic, Aden and Sekulic, Slobodan and Bajkin, Branislav V.",
year = "2021",
abstract = "In the present work, a biomaterial (SBA-16/HA) based on the growth of hydroxyapatite (HA) particles within an organized silica structure SBA-16 (Santa Barbara Amorphous-16) was developed to evaluate its application to act as a porous microenvironment promoting attachment and viability of human dental pulp stem cells of healthy deciduous teeth (SHED). First, SHED were isolated and their phenotypes were evaluated by flow cytometry. The samples of SBA-16/HA were characterized by X-ray diffraction (XRD), small and wide angle X-ray scattering (SWAXS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive spectra detector (EDS). Afterward, cells were cultured in the eluates of the above-mentioned biomaterial aged for 24 hr, 7. and 14 days. Bio-Oss (R) and dentin particles are involved for comparison and cells are cultured in the eluates of these two materials also. Thiazolyl Blue Tetrazolium bromide assay-MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide assay) was used for the determination of cell viability. The results obtained by all aforementioned characterization methods of SBA-16/HA, revealed a uniform spherical mesoporous structure, an intrinsic characteristic of this material. This material displayed excellent biocompatibility on SHEDs, and even proliferative potential, indicating that SBA-16/HA could potentially serve as a suitable substrate for bone regeneration. Contrary to SBA-16/HA, dentin particles showed low cytotoxicity at all time points, compared to control and Bio-Oss (R) groups. Our results substantiate the idea that SBA-16/HA has a beneficial effect on SHEDs, thus paving the way toward developing new material for bone replacement.",
publisher = "Wiley, Hoboken",
journal = "Microscopy Research and Technique",
title = "Biocompatibility of mesoporous SBA-16/hydroxyapatite nanocomposite and dentin demineralized particles on human dental pulp stem cells",
doi = "10.1002/jemt.24017"
}

Bulajic, D. V., Drljaca, J., Capo, I., Savić, S. M., Vojisavljević, K., Hodzic, A., Sekulic, S.,& Bajkin, B. V.. (2021). Biocompatibility of mesoporous SBA-16/hydroxyapatite nanocomposite and dentin demineralized particles on human dental pulp stem cells. in Microscopy Research and Technique
Wiley, Hoboken..
https://doi.org/10.1002/jemt.24017

Bulajic DV, Drljaca J, Capo I, Savić SM, Vojisavljević K, Hodzic A, Sekulic S, Bajkin BV. Biocompatibility of mesoporous SBA-16/hydroxyapatite nanocomposite and dentin demineralized particles on human dental pulp stem cells. in Microscopy Research and Technique. 2021;.
doi:10.1002/jemt.24017 .

Bulajic, Dragica V., Drljaca, Jovana, Capo, Ivan, Savić, Slavica M., Vojisavljević, Katarina, Hodzic, Aden, Sekulic, Slobodan, Bajkin, Branislav V., "Biocompatibility of mesoporous SBA-16/hydroxyapatite nanocomposite and dentin demineralized particles on human dental pulp stem cells" in Microscopy Research and Technique (2021),
https://doi.org/10.1002/jemt.24017 . .

TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Vrabelj, Tanja
AU  - Ursic, Hana
AU  - Malic, Barbara
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1385
AB  - The effects of strontium doping (0-2 mol%) on structure, microstructure and functional properties of potassium sodium niobate (KNN) thin films deposited on Pt(111)/TiOy/SiO2/Si substrates were investigated. Incorporation of Sr up to 1 mol% into the KNN crystal lattice hindered the grain growth, vertical roughness and contributed to the fine-grained and dense thin film microstructure with monoclinic crystal syngony. This effectively reduced leakage current and improved ferroelectric characteristics. Higher doping content (2 mol%) led to the formation of secondary phases and complete deterioration of functional properties. Stabilization of 1 mol% Sr-doped KNN solution with diethanolamine resulted in the film with dielectric constant and losses of 394 and 0.018 at 100 kHz, respectively, leakage current of 3.8 . 10(-8) A/cm(2) at 100 kV/cm and well saturated ferroelectric hysteresis with P-r of 6.8 mu C/cm(2) and low E-c of 85 kV/cm. Benefiting from improved leakage current characteristics at high electric fields and less defect structure, the film showed maximal local piezoelectric coefficient, d(33) similar to 110 pm/V determined by piezo-response force microscopy (PFM), ability to reach fully saturated local hysteresis under low switching DC voltage of 15 V and good ferroelectric domain mobility proven by successful in-situ poling of chosen area using PFM lithography.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Effects of strontium doping on microstructure and functional properties of solution-derived potassium sodium niobate thin films
EP  - 241
IS  - 3
SP  - 231
VL  - 14
DO  - 10.2298/PAC2003231V
ER  - 

@article{
author = "Vojisavljević, Katarina and Vrabelj, Tanja and Ursic, Hana and Malic, Barbara",
year = "2020",
abstract = "The effects of strontium doping (0-2 mol%) on structure, microstructure and functional properties of potassium sodium niobate (KNN) thin films deposited on Pt(111)/TiOy/SiO2/Si substrates were investigated. Incorporation of Sr up to 1 mol% into the KNN crystal lattice hindered the grain growth, vertical roughness and contributed to the fine-grained and dense thin film microstructure with monoclinic crystal syngony. This effectively reduced leakage current and improved ferroelectric characteristics. Higher doping content (2 mol%) led to the formation of secondary phases and complete deterioration of functional properties. Stabilization of 1 mol% Sr-doped KNN solution with diethanolamine resulted in the film with dielectric constant and losses of 394 and 0.018 at 100 kHz, respectively, leakage current of 3.8 . 10(-8) A/cm(2) at 100 kV/cm and well saturated ferroelectric hysteresis with P-r of 6.8 mu C/cm(2) and low E-c of 85 kV/cm. Benefiting from improved leakage current characteristics at high electric fields and less defect structure, the film showed maximal local piezoelectric coefficient, d(33) similar to 110 pm/V determined by piezo-response force microscopy (PFM), ability to reach fully saturated local hysteresis under low switching DC voltage of 15 V and good ferroelectric domain mobility proven by successful in-situ poling of chosen area using PFM lithography.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Effects of strontium doping on microstructure and functional properties of solution-derived potassium sodium niobate thin films",
pages = "241-231",
number = "3",
volume = "14",
doi = "10.2298/PAC2003231V"
}

Vojisavljević, K., Vrabelj, T., Ursic, H.,& Malic, B.. (2020). Effects of strontium doping on microstructure and functional properties of solution-derived potassium sodium niobate thin films. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 14(3), 231-241.
https://doi.org/10.2298/PAC2003231V

Vojisavljević K, Vrabelj T, Ursic H, Malic B. Effects of strontium doping on microstructure and functional properties of solution-derived potassium sodium niobate thin films. in Processing and Application of Ceramics. 2020;14(3):231-241.
doi:10.2298/PAC2003231V .

Vojisavljević, Katarina, Vrabelj, Tanja, Ursic, Hana, Malic, Barbara, "Effects of strontium doping on microstructure and functional properties of solution-derived potassium sodium niobate thin films" in Processing and Application of Ceramics, 14, no. 3 (2020):231-241,
https://doi.org/10.2298/PAC2003231V . .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Savic, Slavica
AU  - Perać, Sanja
AU  - Vojisavljević, Katarina
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2307
AB  - Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 5th Conference of the Serbian Society for Ceramic Materials
T1  - Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping
SP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2307
ER  - 

@conference{
author = "Radojković, Aleksandar and Žunić, Milan and Savic, Slavica and Perać, Sanja and Vojisavljević, Katarina and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "5th Conference of the Serbian Society for Ceramic Materials",
title = "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping",
pages = "131",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2307"
}

Radojković, A., Žunić, M., Savic, S., Perać, S., Vojisavljević, K., Luković Golić, D., Branković, Z.,& Branković, G.. (2019). Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307

Radojković A, Žunić M, Savic S, Perać S, Vojisavljević K, Luković Golić D, Branković Z, Branković G. Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials. 2019;:131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

Radojković, Aleksandar, Žunić, Milan, Savic, Slavica, Perać, Sanja, Vojisavljević, Katarina, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping" in 5th Conference of the Serbian Society for Ceramic Materials (2019):131,
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

TY  - CONF
AU  - Počuča-Nešić, Milica
AU  - Vojisavljević, Katarina
AU  - Savic, Slavica
AU  - Ribić, Vesna
AU  - Tasić, Nikola
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2315
AB  - In this work, two different syntheses approaches – nanocasting and sol-gel
technique were employed for the preparation of SnO2 powders for humidity sensors.
Stock solution of SnCl2 in ethanol (0.5 M) was used as a Sn-precursor for both
syntheses.
In the first procedure, this solution was infiltrated by wet impregnation method
into the hydrothermally prepared KIT-5 used as silica template. Mesoporous
SnO2/KIT-5 hybrid was obtained after two step loading/calcination process.
Calcination was performed at 550 C for 5 h. In the second procedure, silica
template was excluded from synthetic path. Ethanol solution of SnCl2 was slowly
heated to form the gel which was later submitted to the same calcination conditions
resulting in the preparation of SnO2 nanopowder.
By dispersing the as prepared powders in the ethyl-cellulose/α-terpineol
solution and adding a few drops of acetic acid in the mixture, viscous pastes were
prepared and further homogenized for 24 h with magnetic stirrer. Using doctor blade
applicator a few micron thick films were deposited onto alumina substrates provided
with interdigitated Pt/Ag electrodes.
Sensors’ characteristics were compared by measuring the change of the
complex impedance of the samples exposed to a humid climate chamber
environment at different temperatures and RH values from 40 % to 90 % at 25 °C
and from 30 % to 90 % at 50 °C. The value of impedance measured at 42 Hz and
within the RH range of 40 % to 90 %, changes 53 times at 25 °C, and 96 times at 50
°C. In contrast, for the sensor prepared from chemically derived SnO2, the
impedance changes in a moderate way – 8 times at 25 °C and 3 times at 50 °C. Fast
response/recovery time of the SnO2/KIT-5 hybrid sensor exposed to humidity
change from 40 % – 90 % at room temperature, confirmed superior potentials of this
material for humidity sensing over the SnO2.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS
EP  - 137
SP  - 137
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2315
ER  - 

@conference{
author = "Počuča-Nešić, Milica and Vojisavljević, Katarina and Savic, Slavica and Ribić, Vesna and Tasić, Nikola and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "In this work, two different syntheses approaches – nanocasting and sol-gel
technique were employed for the preparation of SnO2 powders for humidity sensors.
Stock solution of SnCl2 in ethanol (0.5 M) was used as a Sn-precursor for both
syntheses.
In the first procedure, this solution was infiltrated by wet impregnation method
into the hydrothermally prepared KIT-5 used as silica template. Mesoporous
SnO2/KIT-5 hybrid was obtained after two step loading/calcination process.
Calcination was performed at 550 C for 5 h. In the second procedure, silica
template was excluded from synthetic path. Ethanol solution of SnCl2 was slowly
heated to form the gel which was later submitted to the same calcination conditions
resulting in the preparation of SnO2 nanopowder.
By dispersing the as prepared powders in the ethyl-cellulose/α-terpineol
solution and adding a few drops of acetic acid in the mixture, viscous pastes were
prepared and further homogenized for 24 h with magnetic stirrer. Using doctor blade
applicator a few micron thick films were deposited onto alumina substrates provided
with interdigitated Pt/Ag electrodes.
Sensors’ characteristics were compared by measuring the change of the
complex impedance of the samples exposed to a humid climate chamber
environment at different temperatures and RH values from 40 % to 90 % at 25 °C
and from 30 % to 90 % at 50 °C. The value of impedance measured at 42 Hz and
within the RH range of 40 % to 90 %, changes 53 times at 25 °C, and 96 times at 50
°C. In contrast, for the sensor prepared from chemically derived SnO2, the
impedance changes in a moderate way – 8 times at 25 °C and 3 times at 50 °C. Fast
response/recovery time of the SnO2/KIT-5 hybrid sensor exposed to humidity
change from 40 % – 90 % at room temperature, confirmed superior potentials of this
material for humidity sensing over the SnO2.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS",
pages = "137-137",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2315"
}

Počuča-Nešić, M., Vojisavljević, K., Savic, S., Ribić, V., Tasić, N., Branković, G.,& Branković, Z.. (2019). COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 137-137.
https://hdl.handle.net/21.15107/rcub_rimsi_2315

Počuča-Nešić M, Vojisavljević K, Savic S, Ribić V, Tasić N, Branković G, Branković Z. COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:137-137.
https://hdl.handle.net/21.15107/rcub_rimsi_2315 .

Počuča-Nešić, Milica, Vojisavljević, Katarina, Savic, Slavica, Ribić, Vesna, Tasić, Nikola, Branković, Goran, Branković, Zorica, "COMPARISON OF SENSING PROPERTIES OF SnO2/KIT-5 AND SnO2 HUMIDITY SENSORS" in 5th Conference of Serbian Society for Ceramic Materials (2019):137-137,
https://hdl.handle.net/21.15107/rcub_rimsi_2315 .

TY  - CONF
AU  - Savic, Slavica
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Knezevic, Nikola
AU  - Mladenović, Minja
AU  - Djokic, Veljko
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2312
AB  - Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - SBA-15 ASSISTED SnO2 HUMIDITY SENSOR
EP  - 135
SP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2312
ER  - 

@conference{
author = "Savic, Slavica and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knezevic, Nikola and Mladenović, Minja and Djokic, Veljko and Branković, Zorica",
year = "2019",
abstract = "Over the past decade, the interest for fabrication of mesoporous metal oxides
has been increased, and that draw attention globally on fabrication and designing
efficient humidity sensors based on these materials. Their unique properties like
high surface area, large pore volume and interconnected pore channels provide
easier adsorption and facile transportation of water molecules across their surfaces.
Nanocasting as technique based on various silica hard templates is one of usually
utilized and efficient methods for processing of such materials.
Silica SBA-15 as a template is currently obtaining exclusive attention in
applications like photocatalysis, sensing, drug delivery and nanomaterials
fabrication since it has high surface area, pore volume, excellent thermal stability
and distinctive interconnectivity of its tunable pore channels. In this work, we used
SBA-15 as a hard template for production of SnO2 humidity sensor. SBA-15
assisted mesoporous SnO2 has been synthesized using incipient wet impregnation
process, consisting of two loading/calcination steps to fill up 15 % of the total pore
volume of template with SnO2, followed by template etching with 2M NaOH.
A few micron thick SnO2 film has been fabricated by applying the paste by the
doctor blade applicator onto alumina substrate provided with interdigitated Pt/Ag
electrodes. The sensor response of the film towards humidity was tested measuring
the change of the complex impedance of the sample exposed to a humid climate
chamber environment with the relative humidity, RH ranging from 40 % to 90 % at
25 °C and from 30 % to 90 % at 50 °C. This study demonstrated that nanocast SnO2
possesses sufficient quality to be used as a material for fabrication of high
performance humidity sensors.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "SBA-15 ASSISTED SnO2 HUMIDITY SENSOR",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2312"
}

Savic, S., Vojisavljević, K., Počuča-Nešić, M., Knezevic, N., Mladenović, M., Djokic, V.,& Branković, Z.. (2019). SBA-15 ASSISTED SnO2 HUMIDITY SENSOR. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 135-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2312

Savic S, Vojisavljević K, Počuča-Nešić M, Knezevic N, Mladenović M, Djokic V, Branković Z. SBA-15 ASSISTED SnO2 HUMIDITY SENSOR. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:135-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2312 .

Savic, Slavica, Vojisavljević, Katarina, Počuča-Nešić, Milica, Knezevic, Nikola, Mladenović, Minja, Djokic, Veljko, Branković, Zorica, "SBA-15 ASSISTED SnO2 HUMIDITY SENSOR" in 5th Conference of Serbian Society for Ceramic Materials (2019):135-135,
https://hdl.handle.net/21.15107/rcub_rimsi_2312 .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Savic, Slavica
AU  - Počuča-Nešić, Milica
AU  - Djokic, Veljko
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2311
AB  - In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-Emmett-
Teller specific surface area of 33 m2/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-
Halenda model from the desorption branch of the N2 adsorption/desorption
isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and
accessible pore structure of the material. Wide-angle X-ray diffraction (XRD)
measurement confirmed the formation of the tetragonal SnO2 phase. Because of the
low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique
EP  - 66
SP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2311
ER  - 

@conference{
author = "Vojisavljević, Katarina and Savic, Slavica and Počuča-Nešić, Milica and Djokic, Veljko and Ribić, Vesna and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "In this contribution, the mesoporous SnO2 was fabricated via nanocasting,
where the hydrothermally processed silica KIT-5 with a high specific surface area of
610 m2/g and pore volume of 0.72 cm3/g was used as a hard template. Following the
two precursor loading/calcination steps of the wet impregnation process, the
appropriate amount of the Sn- precursor solution was used to fill up 15 % of the total
pore volume of the silica template with SnO2. This synthesis route with a template
etching by 2M NaOH solution resulted in nanocast SnO2 with Brunauer-Emmett-
Teller specific surface area of 33 m2/g, where SnO2 nanoparticles of 8–10 nm
formed the ordered domains along with fractions of disordered regions, as confirmed
by the transmission electron microscopy (TEM). Based on the Barrett-Joyner-
Halenda model from the desorption branch of the N2 adsorption/desorption
isotherms, the pore size of SnO2 is centered at 8.6 nm, demonstrating quite open and
accessible pore structure of the material. Wide-angle X-ray diffraction (XRD)
measurement confirmed the formation of the tetragonal SnO2 phase. Because of the
low Si content after the template etching (< 0.5%, confirmed by EDS analysis),
formation of substantial amounts of SnSiO3 can be excluded, and no evidence for
such phase was found in the XRD.
The as prepared SnO2 nanocast was further used to fabricate a few micron thick
film by the doctor blade technique on alumina substrate provided with interdigitated
Pt/Ag electrodes. The sensor response of the film towards humidity was tested
measuring the change of the complex impedance of the sample exposed to a humid
climate chamber environment with the relative humidity (RH) ranging from 40% to
90% at 25 °C and from 30% to 90% at 50 °C. The value of impedance measured at
100 Hz and 25 oC was reduced 132 times within the RH range of 40 % to 90 %,
while it tended to decrease in a moderate manner at 50 °C under the same frequency
and RH range. The film exhibited remarkably rapid response (4 s) and quick
recovery time (6 s) when exposed to RH change from 37% to 90% at 25 °C. Such a
fast response/recovery time and relatively low hysteresis of 4% observed under 50
% RH and 25 °C indicate the promising potentials of nanocasted SnO2 to be used as
an active layer for humidity sensors.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2311"
}

Vojisavljević, K., Savic, S., Počuča-Nešić, M., Djokic, V., Ribić, V., Branković, Z.,& Branković, G.. (2019). Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_2311

Vojisavljević K, Savic S, Počuča-Nešić M, Djokic V, Ribić V, Branković Z, Branković G. Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:66-66.
https://hdl.handle.net/21.15107/rcub_rimsi_2311 .

Vojisavljević, Katarina, Savic, Slavica, Počuča-Nešić, Milica, Djokic, Veljko, Ribić, Vesna, Branković, Zorica, Branković, Goran, "Humidity sensor based on mesoporous SnO2 fabricated via nanocasting technique" in 5th Conference of Serbian Society for Ceramic Materials (2019):66-66,
https://hdl.handle.net/21.15107/rcub_rimsi_2311 .

TY  - CONF
AU  - Savic, Slavica
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Knezevic, Nikola
AU  - Djokic, Veljko
AU  - Ribić, Vesna
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2584
AB  - This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the
nanocasting process using hydrothermally obtained KIT-5 as a hard template.
In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later
evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination
and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder
(P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio
P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique
onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying
regime and finally calcined at 550 °C for 5 h.
The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD)
spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross
section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron
Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated
in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex
impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI
3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz.
Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore
diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even
though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of
agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial
degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The
impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times,
while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when
it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at
40% RH and at room temperature showing its promising capacity as a humidity sensor.
PB  - Societa ceramica italiana
PB  - Politecnico di Torino
C3  - XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY
T1  - NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION
IS  - 119-ABS 201
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2584
ER  - 

@conference{
author = "Savic, Slavica and Vojisavljević, Katarina and Počuča-Nešić, Milica and Knezevic, Nikola and Djokic, Veljko and Ribić, Vesna and Branković, Goran",
year = "2019",
abstract = "This work presents the fabrication of humidity sensor based on SnO2 sensing material derived by the
nanocasting process using hydrothermally obtained KIT-5 as a hard template.
In a typical wet impregnation process, the infiltration of Sn precursor into mesoporous silica KIT-5, and later
evaporation of the solvent were conducted to fill pores to 15 % of the template pore volume. The calcination
and removal of the template were performed to obtain the desired mesoporous SnO2. The obtained powder
(P) was mixed with a 10 % ethyl-cellulose in α- terpineol solution (S) and acetic acid (A) in the weight ratio
P:S:A=7:69.7:23.3 to form a homogeneous paste which was further deposited by doctor blade technique
onto alumina substrate with screen printed Pt/Ag electrodes. The film was subjected to a specific drying
regime and finally calcined at 550 °C for 5 h.
The obtained SnO2 nanoparticles as well KIT-5 template were characterized using X-ray diffraction (XRD)
spectroscopy, Brunauer–Emmett–Teller (BET) analysis and Transmission Electron Microscopy (TEM). Cross
section and surface morphology of SnO2 film were characterized by Field Emission Scanning Electron
Microscopy (FESEM). The humidity sensing properties of the mesoporous SnO2 sensor were investigated
in a JEIO TECH TH-KE-025 temperature and humidity climatic chamber in the range 30–90 % RH. Complex
impedance spectra of the as-fabricated sensor were analyzed at room temperature and 50 °C with a HIOKI
3532-50 LCR HiTESTER in a frequency range 42 Hz - 1 MHz.
Nitrogen adsorption isotherms of KIT-5 showed high specific surface area of 610 m2g-1 and an average pore
diameter of 5.2 nm while those values for SnO2 sample were 33 m2g-1 and 19.9 nm respectively. Even
though that mesoporous ordering of nanocasted negative replica was observed by TEM, the presence of
agglomerates in SnO2, as well as the relatively low specific surface area of 33 m2g-1, confirm its partial
degradation. Diffraction patterns from TEM display well-defined rings typical for cassiterite SnO2. The
impedance measured at 42 Hz, at room temperature, and in the range 40-90% RH reduced 509 times,
while at 50 °C it reduced 48 times. The sensor exhibited quick response (5 s) and recovery time (16 s) when
it exposed to humidity change from 37% RH to 90% RH, and relatively low hysteresis of 3.2% observed at
40% RH and at room temperature showing its promising capacity as a humidity sensor.",
publisher = "Societa ceramica italiana, Politecnico di Torino",
journal = "XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY",
title = "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION",
number = "119-ABS 201",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2584"
}

Savic, S., Vojisavljević, K., Počuča-Nešić, M., Knezevic, N., Djokic, V., Ribić, V.,& Branković, G.. (2019). NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY
Societa ceramica italiana.(119-ABS 201).
https://hdl.handle.net/21.15107/rcub_rimsi_2584

Savic S, Vojisavljević K, Počuča-Nešić M, Knezevic N, Djokic V, Ribić V, Branković G. NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION. in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY. 2019;(119-ABS 201).
https://hdl.handle.net/21.15107/rcub_rimsi_2584 .

Savic, Slavica, Vojisavljević, Katarina, Počuča-Nešić, Milica, Knezevic, Nikola, Djokic, Veljko, Ribić, Vesna, Branković, Goran, "NANOCASTING SYNTHESIS OF MESOPOROUS SnO2 FOR HUMIDITY SENSOR APPLICATION" in XVI CONFERENCE AND EXHIBITION OF THE EUROPEAN CERAMIC SOCIETY, no. 119-ABS 201 (2019),
https://hdl.handle.net/21.15107/rcub_rimsi_2584 .

TY  - CONF
AU  - Nikolic, Nenad
AU  - Šćepanović, Maja
AU  - Grujić-Brojčin, Mirjana
AU  - Vojisavljević, Katarina
AU  - Sreckovic, Tatjana
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2313
AB  - Mechanical activation (MA), as a simple and low-cost method for modifying
physico-chemical properties of disperse systems, is often used for obtaining
powders. Prolonged milling in high-energy mills, necessary for obtaining
nanoparticles, leads to contamination of the starting material, and it can be used as
an additional route for introducing the milling assembly material as the desired
dopant into a powder.
In the present work morphological and structural characteristics of ZnO nanopowders
obtained by MA in a high-energy planetary ball mill with stainless steel
(Fe), Y-stabilized zirconium oxide (Zr) and tungsten carbide (W) vials and balls
were investigated. Knowing that microstructural characteristics of mechanically
milled ZnO powder have strongly depended on milling conditions. The milling has
been performed in a continual regime in air, with following conditions: the rotation
speed of the disk was 400 rpm, ball-to-powder mass ratio was 40:1, and milling time
was 300 min. The samples were characterized by scanning electron microscopy
(SEM), equipped with an EDS, X-ray diffraction (XRD), Raman and UV-vis
spectroscopy. In order to investigate the type of intrinsic defects and impurities
introduced by milling, both milled and thermally treated milled ZnO were analyzed.
According to the SEM, the particles of various sizes (100–500 nm) were present
in the sample before milling. After milling significant changes in particle shapes and
sizes and very pronounced tendency to adhesion in agglomerates, with dimensions
in the range of submicron up to a few micrometers, has been noticed.\
The phase analysis of both milled and thermally treated milled samples of
powders indicates the presence of wurtzite ZnO refined in P63mc space group [1].
The XRD patterns of milled samples of Fe-, W- and Zr-doped ZnO do not reveal the
presence of other ZnO phases. On other side, in thermally treated milled samples of
W- and Fe-doped ZnO the ZnWO4 (samartinite, P2/c) and cubic spinel (Fd-3m) are
present, respectively. In thermally treated milled Zr-doped sample monoclinic and
tetragonal ZrO2 (P21/c and P42/nmc) are present, whereas ZnZrO3 structures could
not be refined due to very low peak intensities [2].
1. M. Šćepanović, M. Grujić-Brojčin, et al., J. Raman Spectrosc., 41 (2010) 914
2. K. Vojisavljević, M. Šćepanović, et al., J. Phys.: Condens. Matter, 20 (2008) 475202
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 5th Conference of Serbian Society for Ceramic Materials
T1  - THE EFFECTS OF MILLING MEDIA ON MORPHOLOGICAL AND STRUCTURAL CHANGES IN MECHANICALLY ACTIVATED ZnO
EP  - 87
SP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2313
ER  - 

@conference{
author = "Nikolic, Nenad and Šćepanović, Maja and Grujić-Brojčin, Mirjana and Vojisavljević, Katarina and Sreckovic, Tatjana",
year = "2019",
abstract = "Mechanical activation (MA), as a simple and low-cost method for modifying
physico-chemical properties of disperse systems, is often used for obtaining
powders. Prolonged milling in high-energy mills, necessary for obtaining
nanoparticles, leads to contamination of the starting material, and it can be used as
an additional route for introducing the milling assembly material as the desired
dopant into a powder.
In the present work morphological and structural characteristics of ZnO nanopowders
obtained by MA in a high-energy planetary ball mill with stainless steel
(Fe), Y-stabilized zirconium oxide (Zr) and tungsten carbide (W) vials and balls
were investigated. Knowing that microstructural characteristics of mechanically
milled ZnO powder have strongly depended on milling conditions. The milling has
been performed in a continual regime in air, with following conditions: the rotation
speed of the disk was 400 rpm, ball-to-powder mass ratio was 40:1, and milling time
was 300 min. The samples were characterized by scanning electron microscopy
(SEM), equipped with an EDS, X-ray diffraction (XRD), Raman and UV-vis
spectroscopy. In order to investigate the type of intrinsic defects and impurities
introduced by milling, both milled and thermally treated milled ZnO were analyzed.
According to the SEM, the particles of various sizes (100–500 nm) were present
in the sample before milling. After milling significant changes in particle shapes and
sizes and very pronounced tendency to adhesion in agglomerates, with dimensions
in the range of submicron up to a few micrometers, has been noticed.\
The phase analysis of both milled and thermally treated milled samples of
powders indicates the presence of wurtzite ZnO refined in P63mc space group [1].
The XRD patterns of milled samples of Fe-, W- and Zr-doped ZnO do not reveal the
presence of other ZnO phases. On other side, in thermally treated milled samples of
W- and Fe-doped ZnO the ZnWO4 (samartinite, P2/c) and cubic spinel (Fd-3m) are
present, respectively. In thermally treated milled Zr-doped sample monoclinic and
tetragonal ZrO2 (P21/c and P42/nmc) are present, whereas ZnZrO3 structures could
not be refined due to very low peak intensities [2].
1. M. Šćepanović, M. Grujić-Brojčin, et al., J. Raman Spectrosc., 41 (2010) 914
2. K. Vojisavljević, M. Šćepanović, et al., J. Phys.: Condens. Matter, 20 (2008) 475202",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "5th Conference of Serbian Society for Ceramic Materials",
title = "THE EFFECTS OF MILLING MEDIA ON MORPHOLOGICAL AND STRUCTURAL CHANGES IN MECHANICALLY ACTIVATED ZnO",
pages = "87-87",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2313"
}

Nikolic, N., Šćepanović, M., Grujić-Brojčin, M., Vojisavljević, K.,& Sreckovic, T.. (2019). THE EFFECTS OF MILLING MEDIA ON MORPHOLOGICAL AND STRUCTURAL CHANGES IN MECHANICALLY ACTIVATED ZnO. in 5th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 87-87.
https://hdl.handle.net/21.15107/rcub_rimsi_2313

Nikolic N, Šćepanović M, Grujić-Brojčin M, Vojisavljević K, Sreckovic T. THE EFFECTS OF MILLING MEDIA ON MORPHOLOGICAL AND STRUCTURAL CHANGES IN MECHANICALLY ACTIVATED ZnO. in 5th Conference of Serbian Society for Ceramic Materials. 2019;:87-87.
https://hdl.handle.net/21.15107/rcub_rimsi_2313 .

Nikolic, Nenad, Šćepanović, Maja, Grujić-Brojčin, Mirjana, Vojisavljević, Katarina, Sreckovic, Tatjana, "THE EFFECTS OF MILLING MEDIA ON MORPHOLOGICAL AND STRUCTURAL CHANGES IN MECHANICALLY ACTIVATED ZnO" in 5th Conference of Serbian Society for Ceramic Materials (2019):87-87,
https://hdl.handle.net/21.15107/rcub_rimsi_2313 .

TY  - JOUR
AU  - Savić, Slavica M.
AU  - Vojisavljević, Katarina
AU  - Počuča-Nešić, Milica
AU  - Zivojević, Kristina
AU  - Mladenović, Minja
AU  - Knezević, Nikola Z.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1124
AB  - Diverse hard template synthetic methodologies are being employed for the synthesis of mesostructured metal oxide and carbon nanomaterials, with the application of mesoporous silica as the hard template. We describe the main differences and advantages/disadvantages between the soft and hard templated synthetic routes, provide an overview of the synthesis and characteristics of different templating mesoporous silica nanomaterials and discuss on practical aspects of the hard template synthetic methodology for obtaining various metal-oxide and carbon-based mesostructured nanomaterials. Also, we cover various recent applications of thus constructed mesostructured metal oxide and carbon nanomaterials, such as sensing, energy storage, fuel cells, and catalysis, which demonstrate the highly promising character of the hard template methodology for the synthesis of a new generation of nanomaterials with broad application potential.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Hard template synthesis of nanomaterials based on mesoporous silica
EP  - 241
IS  - 4
SP  - 225
VL  - 24
DO  - 10.30544/400
ER  - 

@article{
author = "Savić, Slavica M. and Vojisavljević, Katarina and Počuča-Nešić, Milica and Zivojević, Kristina and Mladenović, Minja and Knezević, Nikola Z.",
year = "2018",
abstract = "Diverse hard template synthetic methodologies are being employed for the synthesis of mesostructured metal oxide and carbon nanomaterials, with the application of mesoporous silica as the hard template. We describe the main differences and advantages/disadvantages between the soft and hard templated synthetic routes, provide an overview of the synthesis and characteristics of different templating mesoporous silica nanomaterials and discuss on practical aspects of the hard template synthetic methodology for obtaining various metal-oxide and carbon-based mesostructured nanomaterials. Also, we cover various recent applications of thus constructed mesostructured metal oxide and carbon nanomaterials, such as sensing, energy storage, fuel cells, and catalysis, which demonstrate the highly promising character of the hard template methodology for the synthesis of a new generation of nanomaterials with broad application potential.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Hard template synthesis of nanomaterials based on mesoporous silica",
pages = "241-225",
number = "4",
volume = "24",
doi = "10.30544/400"
}

Savić, S. M., Vojisavljević, K., Počuča-Nešić, M., Zivojević, K., Mladenović, M.,& Knezević, N. Z.. (2018). Hard template synthesis of nanomaterials based on mesoporous silica. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 24(4), 225-241.
https://doi.org/10.30544/400

Savić SM, Vojisavljević K, Počuča-Nešić M, Zivojević K, Mladenović M, Knezević NZ. Hard template synthesis of nanomaterials based on mesoporous silica. in Metallurgical & Materials Engineering. 2018;24(4):225-241.
doi:10.30544/400 .

Savić, Slavica M., Vojisavljević, Katarina, Počuča-Nešić, Milica, Zivojević, Kristina, Mladenović, Minja, Knezević, Nikola Z., "Hard template synthesis of nanomaterials based on mesoporous silica" in Metallurgical & Materials Engineering, 24, no. 4 (2018):225-241,
https://doi.org/10.30544/400 . .

TY  - CONF
AU  - Malič, Barbara
AU  - Vojisavljević, Katarina
AU  - Pečnik, Tanja
AU  - Uršič, Hana
AU  - Matavž, Aleksander
AU  - Bobnar, Vid
AU  - Kutnjak, Zdravko
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3034
AB  - Potassium sodium niobate, K0.5Na0.5NbO3 (KNN) is an environment-friendly lead-free alternative to highly efficient lead-based piezoelectrics. The poor functional properties of the KNN thin films prepared by chemical solution deposition are frequently related to the volatilisation of alkali species during processing, which hinders control over the stoichiometry, contributes to formation of secondary phases and deterioration of the microstructure. The problem can be overcome by adding alkalis in excess and/or by partial substitution of the A- and B- site atoms, such as in the case of the solid state synthesized KNN ceramics. Therefore, in this contribution, the influence of the alkaline-earth A- site dopant, Sr2+ on the microstructure, structure, and functional properties were examined for the solution-derived KNN thin films with alkaline excess. 
Liquid precursors of (K0.5Na0.5)1-ySryNbO3 (KNN-ySr) thin-films, where the Sr- dopant content was set at y = 0, 0.005, 0.01, were prepared from potassium and sodium acetates and niobium ethoxide in 2-methoxyethanol solvent with 5 mol% of potassium acetate excess. Strontium was introduced as acetate or nitrate. The approximately 250 nm thick KNN-ySr thin films on Pt/TiOx/SiO2/Si substrates were obtained by rapid thermal annealing at 650 oC for 5 min. 
According to X-ray diffraction analysis, all synthesized KNN thin films crystallize in pure perovskite phase with random orientation. The surface and cross-section microstructure analysis, performed by the field emission scanning electron microscopy, reveals that the KNN-ySr films consist of equiaxed grains, the average size of which gradually decreases from about 90 nm to a few tens of nm by increasing the Sr-dopant content. In the contribution we discuss the influence of the chemical modification on the functional response, i.e., dielectric properties versus frequency and temperature, polarisation – electric field dependence, leakage current and piezoelectric response of the as-prepared films.
C3  - E-MRS 2017 Spring Meeting & Exhibit, May 22 to 26, 2017, Strasbourg, France
T1  - Strontium-doping effects in solution derived lead-free ferroelectric K(0.5)Na(0.5)NbO3 thin films
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3034
ER  - 

@conference{
author = "Malič, Barbara and Vojisavljević, Katarina and Pečnik, Tanja and Uršič, Hana and Matavž, Aleksander and Bobnar, Vid and Kutnjak, Zdravko",
year = "2017",
abstract = "Potassium sodium niobate, K0.5Na0.5NbO3 (KNN) is an environment-friendly lead-free alternative to highly efficient lead-based piezoelectrics. The poor functional properties of the KNN thin films prepared by chemical solution deposition are frequently related to the volatilisation of alkali species during processing, which hinders control over the stoichiometry, contributes to formation of secondary phases and deterioration of the microstructure. The problem can be overcome by adding alkalis in excess and/or by partial substitution of the A- and B- site atoms, such as in the case of the solid state synthesized KNN ceramics. Therefore, in this contribution, the influence of the alkaline-earth A- site dopant, Sr2+ on the microstructure, structure, and functional properties were examined for the solution-derived KNN thin films with alkaline excess. 
Liquid precursors of (K0.5Na0.5)1-ySryNbO3 (KNN-ySr) thin-films, where the Sr- dopant content was set at y = 0, 0.005, 0.01, were prepared from potassium and sodium acetates and niobium ethoxide in 2-methoxyethanol solvent with 5 mol% of potassium acetate excess. Strontium was introduced as acetate or nitrate. The approximately 250 nm thick KNN-ySr thin films on Pt/TiOx/SiO2/Si substrates were obtained by rapid thermal annealing at 650 oC for 5 min. 
According to X-ray diffraction analysis, all synthesized KNN thin films crystallize in pure perovskite phase with random orientation. The surface and cross-section microstructure analysis, performed by the field emission scanning electron microscopy, reveals that the KNN-ySr films consist of equiaxed grains, the average size of which gradually decreases from about 90 nm to a few tens of nm by increasing the Sr-dopant content. In the contribution we discuss the influence of the chemical modification on the functional response, i.e., dielectric properties versus frequency and temperature, polarisation – electric field dependence, leakage current and piezoelectric response of the as-prepared films.",
journal = "E-MRS 2017 Spring Meeting & Exhibit, May 22 to 26, 2017, Strasbourg, France",
title = "Strontium-doping effects in solution derived lead-free ferroelectric K(0.5)Na(0.5)NbO3 thin films",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3034"
}

Malič, B., Vojisavljević, K., Pečnik, T., Uršič, H., Matavž, A., Bobnar, V.,& Kutnjak, Z.. (2017). Strontium-doping effects in solution derived lead-free ferroelectric K(0.5)Na(0.5)NbO3 thin films. in E-MRS 2017 Spring Meeting & Exhibit, May 22 to 26, 2017, Strasbourg, France.
https://hdl.handle.net/21.15107/rcub_rimsi_3034

Malič B, Vojisavljević K, Pečnik T, Uršič H, Matavž A, Bobnar V, Kutnjak Z. Strontium-doping effects in solution derived lead-free ferroelectric K(0.5)Na(0.5)NbO3 thin films. in E-MRS 2017 Spring Meeting & Exhibit, May 22 to 26, 2017, Strasbourg, France. 2017;.
https://hdl.handle.net/21.15107/rcub_rimsi_3034 .

Malič, Barbara, Vojisavljević, Katarina, Pečnik, Tanja, Uršič, Hana, Matavž, Aleksander, Bobnar, Vid, Kutnjak, Zdravko, "Strontium-doping effects in solution derived lead-free ferroelectric K(0.5)Na(0.5)NbO3 thin films" in E-MRS 2017 Spring Meeting & Exhibit, May 22 to 26, 2017, Strasbourg, France (2017),
https://hdl.handle.net/21.15107/rcub_rimsi_3034 .

TY  - CONF
AU  - Belavič, Darko
AU  - Vojisavljević, Katarina
AU  - Kuscer, Danjela
AU  - Pečnik, Tanja
AU  - Zając, Jerzy
AU  - Anghelescu, Adrian
AU  - Muscalu, George
AU  - Hodnik, Marjan
AU  - Kos, Tomaž
AU  - Drnovšek, Silvo
AU  - Malic, Barbara
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2565
AB  - In the contributionthe design and the fabrication of two different types of ceramic packaging for PiezoMEMS devices ispresented. The first ceramic packaging is designed for housing the piezoelectric energy harvester. This packaging is made using LTCC technology and in the final application willintegrate piezoelectric device, electroniccircuit, storage capacitor and other components into the complex microsystem. The second packaging is developed for piezoelectric vibrating device as a part of water-purification system. In this case,the thick-film technology is used for electrical interconnection of piezoelectric actuators and for the hermetic watertight insulation of the system.
C3  - 21st European Microelectronics and Packaging Conference (EMPC) & Exhibition
T1  - Ceramic packaging of PiezoMEMS devices
EP  - 4
IS  - 17732550
SP  - 1
DO  - 10.23919/EMPC.2017.8346888
ER  - 

@conference{
author = "Belavič, Darko and Vojisavljević, Katarina and Kuscer, Danjela and Pečnik, Tanja and Zając, Jerzy and Anghelescu, Adrian and Muscalu, George and Hodnik, Marjan and Kos, Tomaž and Drnovšek, Silvo and Malic, Barbara",
year = "2017",
abstract = "In the contributionthe design and the fabrication of two different types of ceramic packaging for PiezoMEMS devices ispresented. The first ceramic packaging is designed for housing the piezoelectric energy harvester. This packaging is made using LTCC technology and in the final application willintegrate piezoelectric device, electroniccircuit, storage capacitor and other components into the complex microsystem. The second packaging is developed for piezoelectric vibrating device as a part of water-purification system. In this case,the thick-film technology is used for electrical interconnection of piezoelectric actuators and for the hermetic watertight insulation of the system.",
journal = "21st European Microelectronics and Packaging Conference (EMPC) & Exhibition",
title = "Ceramic packaging of PiezoMEMS devices",
pages = "4-1",
number = "17732550",
doi = "10.23919/EMPC.2017.8346888"
}

Belavič, D., Vojisavljević, K., Kuscer, D., Pečnik, T., Zając, J., Anghelescu, A., Muscalu, G., Hodnik, M., Kos, T., Drnovšek, S.,& Malic, B.. (2017). Ceramic packaging of PiezoMEMS devices. in 21st European Microelectronics and Packaging Conference (EMPC) & Exhibition(17732550), 1-4.
https://doi.org/10.23919/EMPC.2017.8346888

Belavič D, Vojisavljević K, Kuscer D, Pečnik T, Zając J, Anghelescu A, Muscalu G, Hodnik M, Kos T, Drnovšek S, Malic B. Ceramic packaging of PiezoMEMS devices. in 21st European Microelectronics and Packaging Conference (EMPC) & Exhibition. 2017;(17732550):1-4.
doi:10.23919/EMPC.2017.8346888 .

Belavič, Darko, Vojisavljević, Katarina, Kuscer, Danjela, Pečnik, Tanja, Zając, Jerzy, Anghelescu, Adrian, Muscalu, George, Hodnik, Marjan, Kos, Tomaž, Drnovšek, Silvo, Malic, Barbara, "Ceramic packaging of PiezoMEMS devices" in 21st European Microelectronics and Packaging Conference (EMPC) & Exhibition, no. 17732550 (2017):1-4,
https://doi.org/10.23919/EMPC.2017.8346888 . .

TY  - CONF
AU  - Vojisavljević, Katarina
AU  - Pečnik, Tanja
AU  - Uršič, Hana
AU  - Malič, Barbara
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2314
AB  - The interest for the lead-free materials rapidly increased after 2003, when the
legislation against the use of lead-based piezoelectric materials in electronics had
passed. Among the numerous lead-free materials, special attention was paid to some
compositions of potassium sodium niobate solid solutions, K0.5Na0.5NbO3 (KNN)
obtained by a partial replacement of A- and B- site atoms from the perovskite KNN
crystal lattice with dopants, which in the form of ceramic showed excellent
piezoelectric and ferroelectric properties. Driven by the miniaturization and
integration into sensors and energy harvesters, great efforts have been also made in
processing of high quality KNN thin films.
In this contribution, the effects of the A-site doping of KNN films with Sr
(KNN-xSr) on the microstructure and electrical properties were investigated for the
first time. For that purpose, liquid precursors of (K0.5Na0.5)1-xSrxNbO3 (KNN-xSr, x
= 0, 0.005, 0.01) thin-films, were prepared from potassium and sodium acetates,
niobium ethoxide and an appropriate amount of strontium nitrate in 2-
methoxyethanol solvent with 5 mol% of potassium acetate excess. The
approximately 250 nm thick KNN-xSr thin films on Pt(111)/TiOx/SiO2/Si substrates
were obtained through repeated spin-coating and pyrolysis steps, followed by the
rapid thermal annealing at 650 °C.
All KNN films crystallized in pure perovskite structure with (100) preferential
orientation, which became more pronounced in doped films, as confirmed by the
Lotgering factor. The addition of 1 mole% Sr dopant, however, effectively reduced
the leakage current density to 4.2·10-8 A/cm2 at the electric field of 100 kV/cm and
contributed to the well-saturated ferroelectric hysteresis loop of the film. The major
drawback of this film was in the low piezoelectric response (a few pm/V measured
by piezoresponse force microscopy) and inability to switch ferroelectric polarization
by electric field, which can be related to the defects, such as oxygen vacancies. To
overcome the problem, an improved synthesis of the KNN-1Sr films with 1 mole%
Mn was introduced. The reasons for decrease in the leakage current density and
improvement of piezoelectric response will be discussed.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 4th Conference of Serbian Society for Ceramic Materials
T1  - ENHANCED LOCAL PIEZOELECRTIC RESPONSE IN Mn- DOPED (K0.5Na0.5)0.99Sr0.01NbO3 FILMS
EP  - 64
SP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2314
ER  - 

@conference{
author = "Vojisavljević, Katarina and Pečnik, Tanja and Uršič, Hana and Malič, Barbara",
year = "2017",
abstract = "The interest for the lead-free materials rapidly increased after 2003, when the
legislation against the use of lead-based piezoelectric materials in electronics had
passed. Among the numerous lead-free materials, special attention was paid to some
compositions of potassium sodium niobate solid solutions, K0.5Na0.5NbO3 (KNN)
obtained by a partial replacement of A- and B- site atoms from the perovskite KNN
crystal lattice with dopants, which in the form of ceramic showed excellent
piezoelectric and ferroelectric properties. Driven by the miniaturization and
integration into sensors and energy harvesters, great efforts have been also made in
processing of high quality KNN thin films.
In this contribution, the effects of the A-site doping of KNN films with Sr
(KNN-xSr) on the microstructure and electrical properties were investigated for the
first time. For that purpose, liquid precursors of (K0.5Na0.5)1-xSrxNbO3 (KNN-xSr, x
= 0, 0.005, 0.01) thin-films, were prepared from potassium and sodium acetates,
niobium ethoxide and an appropriate amount of strontium nitrate in 2-
methoxyethanol solvent with 5 mol% of potassium acetate excess. The
approximately 250 nm thick KNN-xSr thin films on Pt(111)/TiOx/SiO2/Si substrates
were obtained through repeated spin-coating and pyrolysis steps, followed by the
rapid thermal annealing at 650 °C.
All KNN films crystallized in pure perovskite structure with (100) preferential
orientation, which became more pronounced in doped films, as confirmed by the
Lotgering factor. The addition of 1 mole% Sr dopant, however, effectively reduced
the leakage current density to 4.2·10-8 A/cm2 at the electric field of 100 kV/cm and
contributed to the well-saturated ferroelectric hysteresis loop of the film. The major
drawback of this film was in the low piezoelectric response (a few pm/V measured
by piezoresponse force microscopy) and inability to switch ferroelectric polarization
by electric field, which can be related to the defects, such as oxygen vacancies. To
overcome the problem, an improved synthesis of the KNN-1Sr films with 1 mole%
Mn was introduced. The reasons for decrease in the leakage current density and
improvement of piezoelectric response will be discussed.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "4th Conference of Serbian Society for Ceramic Materials",
title = "ENHANCED LOCAL PIEZOELECRTIC RESPONSE IN Mn- DOPED (K0.5Na0.5)0.99Sr0.01NbO3 FILMS",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2314"
}

Vojisavljević, K., Pečnik, T., Uršič, H.,& Malič, B.. (2017). ENHANCED LOCAL PIEZOELECRTIC RESPONSE IN Mn- DOPED (K0.5Na0.5)0.99Sr0.01NbO3 FILMS. in 4th Conference of Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 64-64.
https://hdl.handle.net/21.15107/rcub_rimsi_2314

Vojisavljević K, Pečnik T, Uršič H, Malič B. ENHANCED LOCAL PIEZOELECRTIC RESPONSE IN Mn- DOPED (K0.5Na0.5)0.99Sr0.01NbO3 FILMS. in 4th Conference of Serbian Society for Ceramic Materials. 2017;:64-64.
https://hdl.handle.net/21.15107/rcub_rimsi_2314 .

Vojisavljević, Katarina, Pečnik, Tanja, Uršič, Hana, Malič, Barbara, "ENHANCED LOCAL PIEZOELECRTIC RESPONSE IN Mn- DOPED (K0.5Na0.5)0.99Sr0.01NbO3 FILMS" in 4th Conference of Serbian Society for Ceramic Materials (2017):64-64,
https://hdl.handle.net/21.15107/rcub_rimsi_2314 .

TY  - JOUR
AU  - Stanciu, Irina
AU  - Predoana, Luminita
AU  - Cusu, Jeanina Pandele
AU  - Preda, Silviu
AU  - Anastasescu, Mihai
AU  - Vojisavljević, Katarina
AU  - Malic, Barbara
AU  - Zaharescu, Maria
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1040
AB  - In order to establish the influence of the preparation method on thermal behaviour of gels obtained by the sol-gel and microwave-assisted sol-gel methods, a comparative thermal analysis study was conducted by the thermogravimetric and differential thermal analysis (TG/DTG/DTA) and evolved gas analysis (EGA) on TiO2 and V2O5-doped TiO2 gels, where TiO2:V2O5 molar ratio was set to 99.95:0.05 and 98.0:2.0. In contrast to TiO2 gels, for which the thermal behaviour was not significantly influenced by the preparation method, the microwave-irradiated binary samples showed a more complex and prolonged decomposition compared to their non-irradiated counterparts. This observation was correlated with influence of microwaves in enhancing the reaction rate between the Ti and V reagents leading to formation of more complex compositions of gels. Based on TG/DTG/DTA results, the temperatures of 300 and 450 A degrees C were chosen for the processing of powders in air. All samples thermally treated at 300 and 450 A degrees C crystallized in a single anatase phase except the TiO2:V2O5 with a molar ratio 99.95:0.05, obtained by microwave-assisted sol-gel method that contains also small amount of rutile phase. At 550 A degrees C all samples contain mixture of anatase and rutile phases.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method
EP  - 651
IS  - 2
SP  - 639
VL  - 130
DO  - 10.1007/s10973-017-6478-y
ER  - 

@article{
author = "Stanciu, Irina and Predoana, Luminita and Cusu, Jeanina Pandele and Preda, Silviu and Anastasescu, Mihai and Vojisavljević, Katarina and Malic, Barbara and Zaharescu, Maria",
year = "2017",
abstract = "In order to establish the influence of the preparation method on thermal behaviour of gels obtained by the sol-gel and microwave-assisted sol-gel methods, a comparative thermal analysis study was conducted by the thermogravimetric and differential thermal analysis (TG/DTG/DTA) and evolved gas analysis (EGA) on TiO2 and V2O5-doped TiO2 gels, where TiO2:V2O5 molar ratio was set to 99.95:0.05 and 98.0:2.0. In contrast to TiO2 gels, for which the thermal behaviour was not significantly influenced by the preparation method, the microwave-irradiated binary samples showed a more complex and prolonged decomposition compared to their non-irradiated counterparts. This observation was correlated with influence of microwaves in enhancing the reaction rate between the Ti and V reagents leading to formation of more complex compositions of gels. Based on TG/DTG/DTA results, the temperatures of 300 and 450 A degrees C were chosen for the processing of powders in air. All samples thermally treated at 300 and 450 A degrees C crystallized in a single anatase phase except the TiO2:V2O5 with a molar ratio 99.95:0.05, obtained by microwave-assisted sol-gel method that contains also small amount of rutile phase. At 550 A degrees C all samples contain mixture of anatase and rutile phases.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method",
pages = "651-639",
number = "2",
volume = "130",
doi = "10.1007/s10973-017-6478-y"
}

Stanciu, I., Predoana, L., Cusu, J. P., Preda, S., Anastasescu, M., Vojisavljević, K., Malic, B.,& Zaharescu, M.. (2017). Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 130(2), 639-651.
https://doi.org/10.1007/s10973-017-6478-y

Stanciu I, Predoana L, Cusu JP, Preda S, Anastasescu M, Vojisavljević K, Malic B, Zaharescu M. Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method. in Journal of Thermal Analysis and Calorimetry. 2017;130(2):639-651.
doi:10.1007/s10973-017-6478-y .

Stanciu, Irina, Predoana, Luminita, Cusu, Jeanina Pandele, Preda, Silviu, Anastasescu, Mihai, Vojisavljević, Katarina, Malic, Barbara, Zaharescu, Maria, "Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method" in Journal of Thermal Analysis and Calorimetry, 130, no. 2 (2017):639-651,
https://doi.org/10.1007/s10973-017-6478-y . .

TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Wicker, Susanne
AU  - Can, Inci
AU  - Bencan, Andreja
AU  - Barsan, Nicolae
AU  - Malic, Barbara
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1038
AB  - The present study demonstrates the relationship between the combustion reaction mechanism induced by the exothermicity of the cobalt nitrate-glycine solution-combustion reactions and morphological details of the nanocrystalline Co3O4. The thermal decomposition pathway and the amount of the heat liberated in combustion are defined by the exothermic reaction between gaseous NH3 and N2O species. A direct evidence that the exothermicity of the combustion reaction plays an important role in formation of the powders with different morphology was obtained from the scanning and transmission electron microscopies. In contrast to stoichiometric reaction, where the short-string Co3O4 particles form hard agglomerates, the energetically softer 50% fuel lean reaction is responsible for weak bonds between Co3O4 particles and formation of the loose cauliflower-like agglomerates. The latter powder with the specific surface area of 64.4 m(2)/g and the average crystallite size of similar to 11 nm was used for the processing of drop-coated sensors, which showed a superior sensor response toward 20 ppm of acetone in 25% r.h. humidity and at low operating temperature of 150 degrees C.
PB  - Elsevier Science Bv, Amsterdam
T2  - Advanced Powder Technology
T1  - Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and their application in chemical sensors
EP  - 1128
IS  - 4
SP  - 1118
VL  - 28
DO  - 10.1016/j.apt.2016.10.029
ER  - 

@article{
author = "Vojisavljević, Katarina and Wicker, Susanne and Can, Inci and Bencan, Andreja and Barsan, Nicolae and Malic, Barbara",
year = "2017",
abstract = "The present study demonstrates the relationship between the combustion reaction mechanism induced by the exothermicity of the cobalt nitrate-glycine solution-combustion reactions and morphological details of the nanocrystalline Co3O4. The thermal decomposition pathway and the amount of the heat liberated in combustion are defined by the exothermic reaction between gaseous NH3 and N2O species. A direct evidence that the exothermicity of the combustion reaction plays an important role in formation of the powders with different morphology was obtained from the scanning and transmission electron microscopies. In contrast to stoichiometric reaction, where the short-string Co3O4 particles form hard agglomerates, the energetically softer 50% fuel lean reaction is responsible for weak bonds between Co3O4 particles and formation of the loose cauliflower-like agglomerates. The latter powder with the specific surface area of 64.4 m(2)/g and the average crystallite size of similar to 11 nm was used for the processing of drop-coated sensors, which showed a superior sensor response toward 20 ppm of acetone in 25% r.h. humidity and at low operating temperature of 150 degrees C.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Advanced Powder Technology",
title = "Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and their application in chemical sensors",
pages = "1128-1118",
number = "4",
volume = "28",
doi = "10.1016/j.apt.2016.10.029"
}

Vojisavljević, K., Wicker, S., Can, I., Bencan, A., Barsan, N.,& Malic, B.. (2017). Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and their application in chemical sensors. in Advanced Powder Technology
Elsevier Science Bv, Amsterdam., 28(4), 1118-1128.
https://doi.org/10.1016/j.apt.2016.10.029

Vojisavljević K, Wicker S, Can I, Bencan A, Barsan N, Malic B. Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and their application in chemical sensors. in Advanced Powder Technology. 2017;28(4):1118-1128.
doi:10.1016/j.apt.2016.10.029 .

Vojisavljević, Katarina, Wicker, Susanne, Can, Inci, Bencan, Andreja, Barsan, Nicolae, Malic, Barbara, "Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and their application in chemical sensors" in Advanced Powder Technology, 28, no. 4 (2017):1118-1128,
https://doi.org/10.1016/j.apt.2016.10.029 . .

TY  - JOUR
AU  - Campa, Andrej
AU  - Berginc, Marko
AU  - Vojisavljević, Katarina
AU  - Malic, Barbara
AU  - Panjan, Peter
AU  - Topic, Marko
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1033
AB  - In optoelectronic and photovoltaic devices, transparent conductive oxides are important in establishing a good electrical contact while minimizing optical losses over a broad range of wavelengths (400-1200 nm). To date, research has focused on In2O3- SnO2 (ITO) films. In this paper, we report on a study of Ga-doped ITO (GITO) films, which in contrast to standard ITO 90/10 (i.e. In:Sn = 90:10) films contain less In. Initially, we describe the development of a multicomponent Ga-In-Sn oxide target with a Ga:In:Sn ratio of 4:64:32, which was used in a radio frequency sputtering system to deposit GITO thin films on glass substrates. Furthermore, we describe the microstructural/structural (scanning electron microscopy and X-ray diffraction spectroscopy), optical (wavelength dependent complex refractive indices) and electrical (resistivity, mobility, free carrier density) measurements used to optimize sputtering conditions and post-annealing processing. As well as achieving an optimized/improved GITO thin film deposited at high substrate and annealing temperatures, we obtained promising thin GITO films with excellent optical properties and with relatively low resistivity (1.7 m Omega cm) deposited and annealed at temperatures around 200 degrees C.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Optical and electrical properties of gallium doped indium tin oxide optimized for low deposition temperature applications
EP  - 57
SP  - 52
VL  - 621
DO  - 10.1016/j.tsf.2016.11.028
ER  - 

@article{
author = "Campa, Andrej and Berginc, Marko and Vojisavljević, Katarina and Malic, Barbara and Panjan, Peter and Topic, Marko",
year = "2017",
abstract = "In optoelectronic and photovoltaic devices, transparent conductive oxides are important in establishing a good electrical contact while minimizing optical losses over a broad range of wavelengths (400-1200 nm). To date, research has focused on In2O3- SnO2 (ITO) films. In this paper, we report on a study of Ga-doped ITO (GITO) films, which in contrast to standard ITO 90/10 (i.e. In:Sn = 90:10) films contain less In. Initially, we describe the development of a multicomponent Ga-In-Sn oxide target with a Ga:In:Sn ratio of 4:64:32, which was used in a radio frequency sputtering system to deposit GITO thin films on glass substrates. Furthermore, we describe the microstructural/structural (scanning electron microscopy and X-ray diffraction spectroscopy), optical (wavelength dependent complex refractive indices) and electrical (resistivity, mobility, free carrier density) measurements used to optimize sputtering conditions and post-annealing processing. As well as achieving an optimized/improved GITO thin film deposited at high substrate and annealing temperatures, we obtained promising thin GITO films with excellent optical properties and with relatively low resistivity (1.7 m Omega cm) deposited and annealed at temperatures around 200 degrees C.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Optical and electrical properties of gallium doped indium tin oxide optimized for low deposition temperature applications",
pages = "57-52",
volume = "621",
doi = "10.1016/j.tsf.2016.11.028"
}

Campa, A., Berginc, M., Vojisavljević, K., Malic, B., Panjan, P.,& Topic, M.. (2017). Optical and electrical properties of gallium doped indium tin oxide optimized for low deposition temperature applications. in Thin Solid Films
Elsevier Science Sa, Lausanne., 621, 52-57.
https://doi.org/10.1016/j.tsf.2016.11.028

Campa A, Berginc M, Vojisavljević K, Malic B, Panjan P, Topic M. Optical and electrical properties of gallium doped indium tin oxide optimized for low deposition temperature applications. in Thin Solid Films. 2017;621:52-57.
doi:10.1016/j.tsf.2016.11.028 .

Campa, Andrej, Berginc, Marko, Vojisavljević, Katarina, Malic, Barbara, Panjan, Peter, Topic, Marko, "Optical and electrical properties of gallium doped indium tin oxide optimized for low deposition temperature applications" in Thin Solid Films, 621 (2017):52-57,
https://doi.org/10.1016/j.tsf.2016.11.028 . .

TY  - JOUR
AU  - Saeedabad, S. Hemmatzadeh
AU  - Baratto, C.
AU  - Rigoni, F.
AU  - Rozati, S. M.
AU  - Sberveglieri, G.
AU  - Vojisavljević, Katarina
AU  - Malic, Barbara
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1024
AB  - In this work, we prepared zinc stannate (ZTO) thin films by RF sputtering starting from a sintered ceramic target with Zn:Sn ratio 2:1, by varying the argon/oxygen pressures during the deposition process. Thin films were deposited on alumina substrates at 400 degrees C, and subsequently annealed at 600 degrees C in the air. The transparency typical for the as-deposited films was preserved even after their annealing at 600 degrees C in the air, where the high temperature was crucial for the improvement of the crystalline Zn2SnO4 , ZTO phase, as confirmed by Raman measurements. Additionally, the post-deposition thermal treatment resulted in porous ZTO films suitable for gas sensing application. The structural and surface morphological properties of thin films were investigated by Raman spectroscopy, field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX). Finally, the gas sensing properties towards nitrogen dioxide, ethanol and acetone have been tested, showing the high potentiality of this material as the gas sensor for ethanol and acetone at 400 degrees C, and nitrogen dioxide at 200 degrees C.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials Science in Semiconductor Processing
T1  - Gas sensing applications of the inverse spinel zinc tin oxide
EP  - 469
SP  - 461
VL  - 71
DO  - 10.1016/j.mssp.2017.09.006
ER  - 

@article{
author = "Saeedabad, S. Hemmatzadeh and Baratto, C. and Rigoni, F. and Rozati, S. M. and Sberveglieri, G. and Vojisavljević, Katarina and Malic, Barbara",
year = "2017",
abstract = "In this work, we prepared zinc stannate (ZTO) thin films by RF sputtering starting from a sintered ceramic target with Zn:Sn ratio 2:1, by varying the argon/oxygen pressures during the deposition process. Thin films were deposited on alumina substrates at 400 degrees C, and subsequently annealed at 600 degrees C in the air. The transparency typical for the as-deposited films was preserved even after their annealing at 600 degrees C in the air, where the high temperature was crucial for the improvement of the crystalline Zn2SnO4 , ZTO phase, as confirmed by Raman measurements. Additionally, the post-deposition thermal treatment resulted in porous ZTO films suitable for gas sensing application. The structural and surface morphological properties of thin films were investigated by Raman spectroscopy, field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX). Finally, the gas sensing properties towards nitrogen dioxide, ethanol and acetone have been tested, showing the high potentiality of this material as the gas sensor for ethanol and acetone at 400 degrees C, and nitrogen dioxide at 200 degrees C.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials Science in Semiconductor Processing",
title = "Gas sensing applications of the inverse spinel zinc tin oxide",
pages = "469-461",
volume = "71",
doi = "10.1016/j.mssp.2017.09.006"
}

Saeedabad, S. H., Baratto, C., Rigoni, F., Rozati, S. M., Sberveglieri, G., Vojisavljević, K.,& Malic, B.. (2017). Gas sensing applications of the inverse spinel zinc tin oxide. in Materials Science in Semiconductor Processing
Elsevier Sci Ltd, Oxford., 71, 461-469.
https://doi.org/10.1016/j.mssp.2017.09.006

Saeedabad SH, Baratto C, Rigoni F, Rozati SM, Sberveglieri G, Vojisavljević K, Malic B. Gas sensing applications of the inverse spinel zinc tin oxide. in Materials Science in Semiconductor Processing. 2017;71:461-469.
doi:10.1016/j.mssp.2017.09.006 .

Saeedabad, S. Hemmatzadeh, Baratto, C., Rigoni, F., Rozati, S. M., Sberveglieri, G., Vojisavljević, Katarina, Malic, Barbara, "Gas sensing applications of the inverse spinel zinc tin oxide" in Materials Science in Semiconductor Processing, 71 (2017):461-469,
https://doi.org/10.1016/j.mssp.2017.09.006 . .