TY  - CONF
AU  - Kovačević, Aleksander
AU  - Pajić, Tanja
AU  - Pavlović, Danica
AU  - Stanić, Marina
AU  - Lekić, Marina
AU  - Nikolić, Stanko
AU  - Jelenković, Branislav
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2411
AB  - In the experiments, the 532 nm CW laser beam is directed to the glass cuvette that is filled either with the medium or with algae suspended in the medium. We have monitored the laser beam diameter at the entrance and exit of the cuvette, and its axial profile through entire cell length. The concentration has been determined by optical microscopy and optical density and has been varied between 10^6 and 10^8 cm-3. The concentration of the algae and the laser beam power affect the beam radius. Our preliminary results have shown the effect of light self-trapping, i.e., the decrease of laser diameter when the algae concentration exceeds 10^6 cm-3 while laser power is above 1 W. The difference of the refractive indexes of the algae and the medium can induce optical trapping of algae, which subsequently changes the concentration of the algae within the laser beam. This in turn can explain different behavior of the beam in the medium with and without algae.
PB  - Institute of Physics Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
C3  - VIII International School and Conference on Photonics PHOTONICA2021 & HEMMAGINERO workshop, 23 - 27 August 2021
T1  - Narrowing of laser beam propagating through biological suspension
EP  - 75
SP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2411
ER  - 

@conference{
author = "Kovačević, Aleksander and Pajić, Tanja and Pavlović, Danica and Stanić, Marina and Lekić, Marina and Nikolić, Stanko and Jelenković, Branislav",
year = "2021",
abstract = "In the experiments, the 532 nm CW laser beam is directed to the glass cuvette that is filled either with the medium or with algae suspended in the medium. We have monitored the laser beam diameter at the entrance and exit of the cuvette, and its axial profile through entire cell length. The concentration has been determined by optical microscopy and optical density and has been varied between 10^6 and 10^8 cm-3. The concentration of the algae and the laser beam power affect the beam radius. Our preliminary results have shown the effect of light self-trapping, i.e., the decrease of laser diameter when the algae concentration exceeds 10^6 cm-3 while laser power is above 1 W. The difference of the refractive indexes of the algae and the medium can induce optical trapping of algae, which subsequently changes the concentration of the algae within the laser beam. This in turn can explain different behavior of the beam in the medium with and without algae.",
publisher = "Institute of Physics Belgrade, Pregrevica 118, 11080 Belgrade, Serbia",
journal = "VIII International School and Conference on Photonics PHOTONICA2021 & HEMMAGINERO workshop, 23 - 27 August 2021",
title = "Narrowing of laser beam propagating through biological suspension",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2411"
}

Kovačević, A., Pajić, T., Pavlović, D., Stanić, M., Lekić, M., Nikolić, S.,& Jelenković, B.. (2021). Narrowing of laser beam propagating through biological suspension. in VIII International School and Conference on Photonics PHOTONICA2021 & HEMMAGINERO workshop, 23 - 27 August 2021
Institute of Physics Belgrade, Pregrevica 118, 11080 Belgrade, Serbia., 75-75.
https://hdl.handle.net/21.15107/rcub_rimsi_2411

Kovačević A, Pajić T, Pavlović D, Stanić M, Lekić M, Nikolić S, Jelenković B. Narrowing of laser beam propagating through biological suspension. in VIII International School and Conference on Photonics PHOTONICA2021 & HEMMAGINERO workshop, 23 - 27 August 2021. 2021;:75-75.
https://hdl.handle.net/21.15107/rcub_rimsi_2411 .

Kovačević, Aleksander, Pajić, Tanja, Pavlović, Danica, Stanić, Marina, Lekić, Marina, Nikolić, Stanko, Jelenković, Branislav, "Narrowing of laser beam propagating through biological suspension" in VIII International School and Conference on Photonics PHOTONICA2021 & HEMMAGINERO workshop, 23 - 27 August 2021 (2021):75-75,
https://hdl.handle.net/21.15107/rcub_rimsi_2411 .

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 . .