TY  - JOUR
AU  - Milenković, Ivana
AU  - Radotić, Ksenija
AU  - Matović, Branko
AU  - Prekajski, Marija
AU  - Živković, Ljiljana
AU  - Jakovljević, Dragica
AU  - Gojgic-Cvijović, Gordana
AU  - Beskoski, Vladimir P.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1126
AB  - Cerium oxide (CeO2) nanoparticles (CONPs) are interesting biomaterials with various applications in biomedicine, cosmetics and the pharmaceutical industry, but with limited practical application because of their low stability in aqueous media. The aim of this study was to obtain CONPs with increased stability by coating the particles. Microbial exopolysaccharides (levan, pullulan) and glucose were used to prepare CONPs under different synthesis conditions. Coating was attempted by adding the carbohydrates during (direct coating) or after (subsequent coating) the synthesis of CONPs. The obtained nanoparticles were characterized by X-Ray diffraction analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The suspension stability of the uncoated and coated CONPs in aqueous media was evaluated by measuring the hydrodynamic size, zeta potential and turbidity. The FT-IR spectra revealed the differences between coated CONPs and showed the success of subsequent coating with carbohydrates. Coating with carbohydrates improved the stability the CONP suspension by decreasing the size of aggregated particles. The suspensions of levan- and glucose-coated CONPs had the best stability. In this study, CONPs were prepared using non-toxic materials, which were completely environmentally friendly. The obtained results open new horizons for CONP synthesis, improving their biological applications.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating
EP  - 757
IS  - 6
SP  - 745
VL  - 83
DO  - 10.2298/JSC171205031M
ER  - 

@article{
author = "Milenković, Ivana and Radotić, Ksenija and Matović, Branko and Prekajski, Marija and Živković, Ljiljana and Jakovljević, Dragica and Gojgic-Cvijović, Gordana and Beskoski, Vladimir P.",
year = "2018",
abstract = "Cerium oxide (CeO2) nanoparticles (CONPs) are interesting biomaterials with various applications in biomedicine, cosmetics and the pharmaceutical industry, but with limited practical application because of their low stability in aqueous media. The aim of this study was to obtain CONPs with increased stability by coating the particles. Microbial exopolysaccharides (levan, pullulan) and glucose were used to prepare CONPs under different synthesis conditions. Coating was attempted by adding the carbohydrates during (direct coating) or after (subsequent coating) the synthesis of CONPs. The obtained nanoparticles were characterized by X-Ray diffraction analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The suspension stability of the uncoated and coated CONPs in aqueous media was evaluated by measuring the hydrodynamic size, zeta potential and turbidity. The FT-IR spectra revealed the differences between coated CONPs and showed the success of subsequent coating with carbohydrates. Coating with carbohydrates improved the stability the CONP suspension by decreasing the size of aggregated particles. The suspensions of levan- and glucose-coated CONPs had the best stability. In this study, CONPs were prepared using non-toxic materials, which were completely environmentally friendly. The obtained results open new horizons for CONP synthesis, improving their biological applications.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating",
pages = "757-745",
number = "6",
volume = "83",
doi = "10.2298/JSC171205031M"
}

Milenković, I., Radotić, K., Matović, B., Prekajski, M., Živković, L., Jakovljević, D., Gojgic-Cvijović, G.,& Beskoski, V. P.. (2018). Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 83(6), 745-757.
https://doi.org/10.2298/JSC171205031M

Milenković I, Radotić K, Matović B, Prekajski M, Živković L, Jakovljević D, Gojgic-Cvijović G, Beskoski VP. Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating. in Journal of the Serbian Chemical Society. 2018;83(6):745-757.
doi:10.2298/JSC171205031M .

Milenković, Ivana, Radotić, Ksenija, Matović, Branko, Prekajski, Marija, Živković, Ljiljana, Jakovljević, Dragica, Gojgic-Cvijović, Gordana, Beskoski, Vladimir P., "Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating" in Journal of the Serbian Chemical Society, 83, no. 6 (2018):745-757,
https://doi.org/10.2298/JSC171205031M . .

TY  - JOUR
AU  - Dmitrović, Svetlana
AU  - Prekajski, Marija
AU  - Jokic, Bojan
AU  - Branković, Goran
AU  - Zarubica, Aleksandra
AU  - Zikic, Vladimir
AU  - Matović, Branko
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1132
AB  - Spider silk fibers, collected from Pholcus Phalangioides spider were used as a template for obtaining magnesium oxide (MgO, periclase) as well as magnesium hydroxide (Mg(OH)(2), brucite) fibers. Magnesium oxide fibers were obtained in a simple manner by heat induced decomposition of magnesium salt (MgCl2) in the presence of the spider silk fibers, while magnesium hydroxide fibers were synthesized by hydration of MgO fibers at 50, 70 and 90 degrees C, for 48 and 96 h. According to Scanning electron microscopy (SEM), dimensions of spider silk fibers determined the dimension of synthesized MgO fibers, while for Mg(OH)(2) fibers, the average diameter was increased with prolonging the hydration period. The surface of Mg(OH)(2) fibers was noticed to be covered with brucite in a form of plates. X-Ray diffraction (XRD) analysis showed that MgO fibers were single-phased (the pure magnesium oxide fibers were obtained), while Mg(OH)(2) fibers were two-or single-phased brucite depending on incubation period, and/or incubation temperature.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers
EP  - 28
IS  - 1
SP  - 23
VL  - 72
DO  - 10.2298/HEMIND170404018D
ER  - 

@article{
author = "Dmitrović, Svetlana and Prekajski, Marija and Jokic, Bojan and Branković, Goran and Zarubica, Aleksandra and Zikic, Vladimir and Matović, Branko",
year = "2018",
abstract = "Spider silk fibers, collected from Pholcus Phalangioides spider were used as a template for obtaining magnesium oxide (MgO, periclase) as well as magnesium hydroxide (Mg(OH)(2), brucite) fibers. Magnesium oxide fibers were obtained in a simple manner by heat induced decomposition of magnesium salt (MgCl2) in the presence of the spider silk fibers, while magnesium hydroxide fibers were synthesized by hydration of MgO fibers at 50, 70 and 90 degrees C, for 48 and 96 h. According to Scanning electron microscopy (SEM), dimensions of spider silk fibers determined the dimension of synthesized MgO fibers, while for Mg(OH)(2) fibers, the average diameter was increased with prolonging the hydration period. The surface of Mg(OH)(2) fibers was noticed to be covered with brucite in a form of plates. X-Ray diffraction (XRD) analysis showed that MgO fibers were single-phased (the pure magnesium oxide fibers were obtained), while Mg(OH)(2) fibers were two-or single-phased brucite depending on incubation period, and/or incubation temperature.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers",
pages = "28-23",
number = "1",
volume = "72",
doi = "10.2298/HEMIND170404018D"
}

Dmitrović, S., Prekajski, M., Jokic, B., Branković, G., Zarubica, A., Zikic, V.,& Matović, B.. (2018). Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 72(1), 23-28.
https://doi.org/10.2298/HEMIND170404018D

Dmitrović S, Prekajski M, Jokic B, Branković G, Zarubica A, Zikic V, Matović B. Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers. in Hemijska Industrija. 2018;72(1):23-28.
doi:10.2298/HEMIND170404018D .

Dmitrović, Svetlana, Prekajski, Marija, Jokic, Bojan, Branković, Goran, Zarubica, Aleksandra, Zikic, Vladimir, Matović, Branko, "Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers" in Hemijska Industrija, 72, no. 1 (2018):23-28,
https://doi.org/10.2298/HEMIND170404018D . .

TY  - JOUR
AU  - Dmitrović, Svetlana
AU  - Nikolic, Marko G.
AU  - Jelenković, Branislav
AU  - Prekajski, Marija
AU  - Rabasović, Mihailo
AU  - Zarubica, Aleksandra
AU  - Branković, Goran
AU  - Matović, Branko
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1056
AB  - Spider dragline silk was coated with pure as well as Eu-doped ceria nanopowders at the room temperature. The treatment was done by immersion of the spider silkmesh into aqueous solutions of cerium nitrate (Ce(NO3)(3)) and ammonium hydroxide (NH4OH). Depending on the relationship between Ce3+ ion and ammonium hydroxide concentration, coated fibers exhibited a different thickness. Obtained materials were studied by means of FESEM. It was found that ceria nanoparticles of average size of 3 nm were coated along spider thread. X-ray diffraction (XRD) and selected-area electron diffraction (SAED) confirmed crystal nature of nanoparticle coating of spider silk. By using Williamson-Hall plots, crystallite size and strain were estimated. EDS measurement confirmed the presence of Eu in spider-Eu-doped ceria composite, and according to FTIR analysis, the interaction between CeO2 and spider silk was proposed. The morphology of obtained composite was observed by TEM. The photoluminescence emission spectra of spider silk coated with Eu-doped ceria were measured with two different excitations of 385 and 466 nm. The two-photon excited auto-fluorescence of spider silk coated with Eu-doped ceria was detected using a nonlinear laser scanning microscope. Obtained composite has a potential as a fluorescent labeling material in diverse applications.
PB  - Springer, Dordrecht
T2  - Journal of Nanoparticle Research
T1  - Photoluminescent properties of spider silk coated with Eu-doped nanoceria
IS  - 2
VL  - 19
DO  - 10.1007/s11051-017-3750-9
ER  - 

@article{
author = "Dmitrović, Svetlana and Nikolic, Marko G. and Jelenković, Branislav and Prekajski, Marija and Rabasović, Mihailo and Zarubica, Aleksandra and Branković, Goran and Matović, Branko",
year = "2017",
abstract = "Spider dragline silk was coated with pure as well as Eu-doped ceria nanopowders at the room temperature. The treatment was done by immersion of the spider silkmesh into aqueous solutions of cerium nitrate (Ce(NO3)(3)) and ammonium hydroxide (NH4OH). Depending on the relationship between Ce3+ ion and ammonium hydroxide concentration, coated fibers exhibited a different thickness. Obtained materials were studied by means of FESEM. It was found that ceria nanoparticles of average size of 3 nm were coated along spider thread. X-ray diffraction (XRD) and selected-area electron diffraction (SAED) confirmed crystal nature of nanoparticle coating of spider silk. By using Williamson-Hall plots, crystallite size and strain were estimated. EDS measurement confirmed the presence of Eu in spider-Eu-doped ceria composite, and according to FTIR analysis, the interaction between CeO2 and spider silk was proposed. The morphology of obtained composite was observed by TEM. The photoluminescence emission spectra of spider silk coated with Eu-doped ceria were measured with two different excitations of 385 and 466 nm. The two-photon excited auto-fluorescence of spider silk coated with Eu-doped ceria was detected using a nonlinear laser scanning microscope. Obtained composite has a potential as a fluorescent labeling material in diverse applications.",
publisher = "Springer, Dordrecht",
journal = "Journal of Nanoparticle Research",
title = "Photoluminescent properties of spider silk coated with Eu-doped nanoceria",
number = "2",
volume = "19",
doi = "10.1007/s11051-017-3750-9"
}

Dmitrović, S., Nikolic, M. G., Jelenković, B., Prekajski, M., Rabasović, M., Zarubica, A., Branković, G.,& Matović, B.. (2017). Photoluminescent properties of spider silk coated with Eu-doped nanoceria. in Journal of Nanoparticle Research
Springer, Dordrecht., 19(2).
https://doi.org/10.1007/s11051-017-3750-9

Dmitrović S, Nikolic MG, Jelenković B, Prekajski M, Rabasović M, Zarubica A, Branković G, Matović B. Photoluminescent properties of spider silk coated with Eu-doped nanoceria. in Journal of Nanoparticle Research. 2017;19(2).
doi:10.1007/s11051-017-3750-9 .

Dmitrović, Svetlana, Nikolic, Marko G., Jelenković, Branislav, Prekajski, Marija, Rabasović, Mihailo, Zarubica, Aleksandra, Branković, Goran, Matović, Branko, "Photoluminescent properties of spider silk coated with Eu-doped nanoceria" in Journal of Nanoparticle Research, 19, no. 2 (2017),
https://doi.org/10.1007/s11051-017-3750-9 . .

TY  - JOUR
AU  - Luković, Jelena
AU  - Babić, Biljana M.
AU  - Bucevac, Dusan
AU  - Prekajski, Marija
AU  - Pantic, Jelena
AU  - Baščarević, Zvezdana
AU  - Matović, Branko
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/899
AB  - Fine tungsten carbide (WC) powder was prepared by solid state reaction between tungsten powder (W) and activated carbon cloth as a new carbon (C) source. The effect of temperature and time of heat treatment as well as the effect of C/W ratio on WC phase formation was studied. The results obtained by X-ray powder diffraction (XRPD) show that obtained powder is single WC. Microstructure and morphology was determinate by means of scanning electron microscopy (SEM). Brunauer-Emmett-Teller (BET) method was used for examining specific surface area and texture of obtained powders. It was found that WC powder was successfully synthesized in excess carbon after eight-hour heat treatment at relatively low temperature (1000 degrees C).
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Synthesis and characterization of tungsten carbide fine powders
EP  - 1277
IS  - 1
SP  - 1271
VL  - 41
DO  - 10.1016/j.ceramint.2014.09.057
ER  - 

@article{
author = "Luković, Jelena and Babić, Biljana M. and Bucevac, Dusan and Prekajski, Marija and Pantic, Jelena and Baščarević, Zvezdana and Matović, Branko",
year = "2015",
abstract = "Fine tungsten carbide (WC) powder was prepared by solid state reaction between tungsten powder (W) and activated carbon cloth as a new carbon (C) source. The effect of temperature and time of heat treatment as well as the effect of C/W ratio on WC phase formation was studied. The results obtained by X-ray powder diffraction (XRPD) show that obtained powder is single WC. Microstructure and morphology was determinate by means of scanning electron microscopy (SEM). Brunauer-Emmett-Teller (BET) method was used for examining specific surface area and texture of obtained powders. It was found that WC powder was successfully synthesized in excess carbon after eight-hour heat treatment at relatively low temperature (1000 degrees C).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Synthesis and characterization of tungsten carbide fine powders",
pages = "1277-1271",
number = "1",
volume = "41",
doi = "10.1016/j.ceramint.2014.09.057"
}

Luković, J., Babić, B. M., Bucevac, D., Prekajski, M., Pantic, J., Baščarević, Z.,& Matović, B.. (2015). Synthesis and characterization of tungsten carbide fine powders. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(1), 1271-1277.
https://doi.org/10.1016/j.ceramint.2014.09.057

Luković J, Babić BM, Bucevac D, Prekajski M, Pantic J, Baščarević Z, Matović B. Synthesis and characterization of tungsten carbide fine powders. in Ceramics International. 2015;41(1):1271-1277.
doi:10.1016/j.ceramint.2014.09.057 .

Luković, Jelena, Babić, Biljana M., Bucevac, Dusan, Prekajski, Marija, Pantic, Jelena, Baščarević, Zvezdana, Matović, Branko, "Synthesis and characterization of tungsten carbide fine powders" in Ceramics International, 41, no. 1 (2015):1271-1277,
https://doi.org/10.1016/j.ceramint.2014.09.057 . .

TY  - JOUR
AU  - Prekajski, Marija
AU  - Stojmenović, M.
AU  - Radojković, Aleksandar
AU  - Branković, Goran
AU  - Oraon, H.
AU  - Subasri, R.
AU  - Matović, Branko
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/804
AB  - Solid solution Ce1-xBixO2-delta nanopowders with the composition of x = 0.1-0.5 were synthesized by using Self Propagating Room Temperature procedure (SPRT). The results obtained by XRPD show that synthesized samples were single-phase solid solution at room temperature. Powders were densified by using Conventional (CS) and Microwave (MS) Sintering techniques at different temperatures, in an air atmosphere for 1 h. Scanning electron microscopy (SEM) and complex impedance method measurements were carried out on sintered samples. Maximum achieved density was for sample with Ce0.80Bi0.20O2-delta composition for both applied sintering techniques. The highest conductivity was obtained for the ceramic composition Ce0.80Bi0.20O2-delta sintered by microwave technique at 700 degrees C.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Sintering and electrical properties of Ce1-xBixO2-delta solid solution
EP  - 568
SP  - 563
VL  - 617
DO  - 10.1016/j.jallcom.2014.08.090
ER  - 

@article{
author = "Prekajski, Marija and Stojmenović, M. and Radojković, Aleksandar and Branković, Goran and Oraon, H. and Subasri, R. and Matović, Branko",
year = "2014",
abstract = "Solid solution Ce1-xBixO2-delta nanopowders with the composition of x = 0.1-0.5 were synthesized by using Self Propagating Room Temperature procedure (SPRT). The results obtained by XRPD show that synthesized samples were single-phase solid solution at room temperature. Powders were densified by using Conventional (CS) and Microwave (MS) Sintering techniques at different temperatures, in an air atmosphere for 1 h. Scanning electron microscopy (SEM) and complex impedance method measurements were carried out on sintered samples. Maximum achieved density was for sample with Ce0.80Bi0.20O2-delta composition for both applied sintering techniques. The highest conductivity was obtained for the ceramic composition Ce0.80Bi0.20O2-delta sintered by microwave technique at 700 degrees C.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Sintering and electrical properties of Ce1-xBixO2-delta solid solution",
pages = "568-563",
volume = "617",
doi = "10.1016/j.jallcom.2014.08.090"
}

Prekajski, M., Stojmenović, M., Radojković, A., Branković, G., Oraon, H., Subasri, R.,& Matović, B.. (2014). Sintering and electrical properties of Ce1-xBixO2-delta solid solution. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 617, 563-568.
https://doi.org/10.1016/j.jallcom.2014.08.090

Prekajski M, Stojmenović M, Radojković A, Branković G, Oraon H, Subasri R, Matović B. Sintering and electrical properties of Ce1-xBixO2-delta solid solution. in Journal of Alloys and Compounds. 2014;617:563-568.
doi:10.1016/j.jallcom.2014.08.090 .

Prekajski, Marija, Stojmenović, M., Radojković, Aleksandar, Branković, Goran, Oraon, H., Subasri, R., Matović, Branko, "Sintering and electrical properties of Ce1-xBixO2-delta solid solution" in Journal of Alloys and Compounds, 617 (2014):563-568,
https://doi.org/10.1016/j.jallcom.2014.08.090 . .

TY  - JOUR
AU  - Pantic, Jelena R
AU  - Kremenović, Aleksandar S
AU  - Dosen, Anja M
AU  - Prekajski, Marija
AU  - Stanković, Nadezda G
AU  - Baščarević, Zvezdana
AU  - Matović, Branko
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/689
AB  - Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibromilling for homogenization and activation of precursors. The mechanochemical process initially yielded amorphous powders, which on further calcination, crystallized to yield sphene ceramic. The evolution of the phase composition with thermal treatment was investigated by X-ray powder diffraction (XRPD). Powder morphology and particle size distribution were analyzed by scanning electron microscopy (SEM) and laser diffraction, respectively. Rietveld refinement was employed to get the structural information of the synthesized powder. Densification and microstructure evolution was determined by means of density and scanning electron microscopy (SEM). The most favorable conditions for mechanical activation and synthesis of sphene based ceramic material are reported.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Influence of mechanical activation on sphene based ceramic material synthesis
EP  - 488
IS  - 1
SP  - 483
VL  - 39
DO  - 10.1016/j.ceramint.2012.06.052
ER  - 

@article{
author = "Pantic, Jelena R and Kremenović, Aleksandar S and Dosen, Anja M and Prekajski, Marija and Stanković, Nadezda G and Baščarević, Zvezdana and Matović, Branko",
year = "2013",
abstract = "Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibromilling for homogenization and activation of precursors. The mechanochemical process initially yielded amorphous powders, which on further calcination, crystallized to yield sphene ceramic. The evolution of the phase composition with thermal treatment was investigated by X-ray powder diffraction (XRPD). Powder morphology and particle size distribution were analyzed by scanning electron microscopy (SEM) and laser diffraction, respectively. Rietveld refinement was employed to get the structural information of the synthesized powder. Densification and microstructure evolution was determined by means of density and scanning electron microscopy (SEM). The most favorable conditions for mechanical activation and synthesis of sphene based ceramic material are reported.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Influence of mechanical activation on sphene based ceramic material synthesis",
pages = "488-483",
number = "1",
volume = "39",
doi = "10.1016/j.ceramint.2012.06.052"
}

Pantic, J. R., Kremenović, A. S., Dosen, A. M., Prekajski, M., Stanković, N. G., Baščarević, Z.,& Matović, B.. (2013). Influence of mechanical activation on sphene based ceramic material synthesis. in Ceramics International
Elsevier Sci Ltd, Oxford., 39(1), 483-488.
https://doi.org/10.1016/j.ceramint.2012.06.052

Pantic JR, Kremenović AS, Dosen AM, Prekajski M, Stanković NG, Baščarević Z, Matović B. Influence of mechanical activation on sphene based ceramic material synthesis. in Ceramics International. 2013;39(1):483-488.
doi:10.1016/j.ceramint.2012.06.052 .

Pantic, Jelena R, Kremenović, Aleksandar S, Dosen, Anja M, Prekajski, Marija, Stanković, Nadezda G, Baščarević, Zvezdana, Matović, Branko, "Influence of mechanical activation on sphene based ceramic material synthesis" in Ceramics International, 39, no. 1 (2013):483-488,
https://doi.org/10.1016/j.ceramint.2012.06.052 . .