TY  - CONF
AU  - Rajić, Vladimir
AU  - Marković, Smilja
AU  - Popović, M.
AU  - Novaković, M.
AU  - Veselinović, Ljiljana
AU  - Stojković Simatović, Ivana
AU  - Škapin, Srečo Davor
AU  - Stojanović, S.
AU  - Rac, Vladislav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11554
AB  - Zink oxide-based materials have a great potential to be applied in photo and electro catalysts, opto-electronic (indoor illumination, LED), etc. Attractiveness of ZnO is attributed to wide bandgap energy at room temperature (3.37 eV), high electron mobility and transfer efficiency (115-155 cm2·V-1·s-1), large exciton binding energy (60 meV), intrinsic stability, nontoxicity, environmental compatibility and also, simple and not expensive synthesis procedure. A lot of different approaches can be used to modify the bandgap (i.e. optical absorption) of ZnO materials: metal and nonmetal ion doping, hydrogenation, the incorporation of crystalline defects in the form of V and I, modification of particles morphology and surface topology, etc. In this study, eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped ZnO nanoparticles with 5, 10, 15 and 20 at.% of Fe (Zn1-xFeyO(1-x+1.5y)). The influence of different amount of Fe substituted Zn in ZnO on the crystal structure, morphological, textural, and optical properties as well as on functionality of ZnO particles was investigated. The crystal structure and phase purity of the Zn1-xFeyO(1-x+1.5y) particles were determined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Effects of the Fe3+ amount on particles morphology and texture properties were observed with field emission scanning electron microscopy (FE–SEM), transmission electron microscopy (TEM) and nitrogen adsorption–desorption isotherm, respectively. Optical properties were studied using UV-Vis diffuse reflectance and photoluminescence spectroscopy. Functionality of ZnO particles was studied due to their photocatalytic and electrochemical activities. Photocatalytic activity was examined via decolorization of methylene blue under direct sunlight irradiation. Electrochemical behavior of the ZnO samples as anode material was evaluated by linear sweep voltammetry in 0.5 M Na2SO4 electrolyte.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Crystal structure, optical properties and photo/electrocatalytic activity of nanostructured Zn1-xFeyO(1-x+1.5y)
SP  - 34
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11554
ER  - 

@conference{
author = "Rajić, Vladimir and Marković, Smilja and Popović, M. and Novaković, M. and Veselinović, Ljiljana and Stojković Simatović, Ivana and Škapin, Srečo Davor and Stojanović, S. and Rac, Vladislav",
year = "2023",
abstract = "Zink oxide-based materials have a great potential to be applied in photo and electro catalysts, opto-electronic (indoor illumination, LED), etc. Attractiveness of ZnO is attributed to wide bandgap energy at room temperature (3.37 eV), high electron mobility and transfer efficiency (115-155 cm2·V-1·s-1), large exciton binding energy (60 meV), intrinsic stability, nontoxicity, environmental compatibility and also, simple and not expensive synthesis procedure. A lot of different approaches can be used to modify the bandgap (i.e. optical absorption) of ZnO materials: metal and nonmetal ion doping, hydrogenation, the incorporation of crystalline defects in the form of V and I, modification of particles morphology and surface topology, etc. In this study, eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped ZnO nanoparticles with 5, 10, 15 and 20 at.% of Fe (Zn1-xFeyO(1-x+1.5y)). The influence of different amount of Fe substituted Zn in ZnO on the crystal structure, morphological, textural, and optical properties as well as on functionality of ZnO particles was investigated. The crystal structure and phase purity of the Zn1-xFeyO(1-x+1.5y) particles were determined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Effects of the Fe3+ amount on particles morphology and texture properties were observed with field emission scanning electron microscopy (FE–SEM), transmission electron microscopy (TEM) and nitrogen adsorption–desorption isotherm, respectively. Optical properties were studied using UV-Vis diffuse reflectance and photoluminescence spectroscopy. Functionality of ZnO particles was studied due to their photocatalytic and electrochemical activities. Photocatalytic activity was examined via decolorization of methylene blue under direct sunlight irradiation. Electrochemical behavior of the ZnO samples as anode material was evaluated by linear sweep voltammetry in 0.5 M Na2SO4 electrolyte.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Crystal structure, optical properties and photo/electrocatalytic activity of nanostructured Zn1-xFeyO(1-x+1.5y)",
pages = "34",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11554"
}

Rajić, V., Marković, S., Popović, M., Novaković, M., Veselinović, L., Stojković Simatović, I., Škapin, S. D., Stojanović, S.,& Rac, V.. (2023). Crystal structure, optical properties and photo/electrocatalytic activity of nanostructured Zn1-xFeyO(1-x+1.5y). in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 34.
https://hdl.handle.net/21.15107/rcub_vinar_11554

Rajić V, Marković S, Popović M, Novaković M, Veselinović L, Stojković Simatović I, Škapin SD, Stojanović S, Rac V. Crystal structure, optical properties and photo/electrocatalytic activity of nanostructured Zn1-xFeyO(1-x+1.5y). in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:34.
https://hdl.handle.net/21.15107/rcub_vinar_11554 .

Rajić, Vladimir, Marković, Smilja, Popović, M., Novaković, M., Veselinović, Ljiljana, Stojković Simatović, Ivana, Škapin, Srečo Davor, Stojanović, S., Rac, Vladislav, "Crystal structure, optical properties and photo/electrocatalytic activity of nanostructured Zn1-xFeyO(1-x+1.5y)" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):34,
https://hdl.handle.net/21.15107/rcub_vinar_11554 .

TY  - CONF
AU  - Stojanović, S.
AU  - Mitić, Ž.
AU  - Najman, Stevo
AU  - Ignjatović, Nenad L.
AU  - Uskoković, Dragan
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/406
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7422
AB  - In this study we observed the changes in surface of nanoparticles of two different nanomaterials, cobalt-substituted hydroxyapatite (CoHAp) and calcium phosphate/poly-(DLlactide-co-glycolide) (CP/PLGA) that occurred under simulated physiological conditions in vitro. Both nanomaterials were incubated in an appropriate volume of Dulbecco's Modified Eagle Medium (DMEM) for 3 days at 37 0C and then the medium was removed and materials were dried. Surface changes of nanoparticles were studied by scanning electron microscopy (SEM). Results of SEM analysis show that changes in the size and shape of the nanoparticles took place. These changes can be explained by interactions of nanomaterials with DMEM. In the case of CP/PLGA it was probably the result of polymer degradation and changes in CoHAp nanoparticles were probably the result of ion exchange.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Scanning electron microscopy study of changes in nanoparticles surface under in vitro simulated physiological conditions
SP  - 149
EP  - 149
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7422
ER  - 

@conference{
author = "Stojanović, S. and Mitić, Ž. and Najman, Stevo and Ignjatović, Nenad L. and Uskoković, Dragan",
year = "2013",
abstract = "In this study we observed the changes in surface of nanoparticles of two different nanomaterials, cobalt-substituted hydroxyapatite (CoHAp) and calcium phosphate/poly-(DLlactide-co-glycolide) (CP/PLGA) that occurred under simulated physiological conditions in vitro. Both nanomaterials were incubated in an appropriate volume of Dulbecco's Modified Eagle Medium (DMEM) for 3 days at 37 0C and then the medium was removed and materials were dried. Surface changes of nanoparticles were studied by scanning electron microscopy (SEM). Results of SEM analysis show that changes in the size and shape of the nanoparticles took place. These changes can be explained by interactions of nanomaterials with DMEM. In the case of CP/PLGA it was probably the result of polymer degradation and changes in CoHAp nanoparticles were probably the result of ion exchange.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Scanning electron microscopy study of changes in nanoparticles surface under in vitro simulated physiological conditions",
pages = "149-149",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7422"
}

Stojanović, S., Mitić, Ž., Najman, S., Ignjatović, N. L.,& Uskoković, D.. (2013). Scanning electron microscopy study of changes in nanoparticles surface under in vitro simulated physiological conditions. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 149-149.
https://hdl.handle.net/21.15107/rcub_vinar_7422

Stojanović S, Mitić Ž, Najman S, Ignjatović NL, Uskoković D. Scanning electron microscopy study of changes in nanoparticles surface under in vitro simulated physiological conditions. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:149-149.
https://hdl.handle.net/21.15107/rcub_vinar_7422 .

Stojanović, S., Mitić, Ž., Najman, Stevo, Ignjatović, Nenad L., Uskoković, Dragan, "Scanning electron microscopy study of changes in nanoparticles surface under in vitro simulated physiological conditions" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):149-149,
https://hdl.handle.net/21.15107/rcub_vinar_7422 .

TY  - CONF
AU  - Najman, Stevo
AU  - Petrović, Dragan
AU  - Vučković, Ivan
AU  - Živković, J.
AU  - Stojanović, S.
AU  - Ignjatović, Nenad L.
AU  - Uskoković, Dragan
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/400
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7419
AB  - The aim of this study was to investigate the osteogenic potential of freshly isolated adipose tissue-derived mesenchymal stromal/stem cells (ASCs) in bone regeneration of rabbit calvaria defects. ASCs were applied together with calcium phosphate-poly-DL-lactide-co-glycolide (CPPLGA) nanoparticles that are mixed in an appropriately prepared blood clot (BC). Parallelly were analysed defects filled with fragmented adipose tissue (FAT) instead of ASCs, with CP-PLGA in BC, and only with nanoparticles. Bone density in defects was measured after I, III and VI weeks, and histological examination was done after IV and VIII weeks after filling defects. Approach to assisted osteoregeneration which is based on the use of fresh non-induced ASCs has proven to be promising due to the favorable effect on bone regeneration and simplicity of their application.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Osteogenic potential of freshly isolated cells of adiposederived mesenchymal fraction applied with nanoparticles
SP  - 45
EP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7419
ER  - 

@conference{
author = "Najman, Stevo and Petrović, Dragan and Vučković, Ivan and Živković, J. and Stojanović, S. and Ignjatović, Nenad L. and Uskoković, Dragan",
year = "2013",
abstract = "The aim of this study was to investigate the osteogenic potential of freshly isolated adipose tissue-derived mesenchymal stromal/stem cells (ASCs) in bone regeneration of rabbit calvaria defects. ASCs were applied together with calcium phosphate-poly-DL-lactide-co-glycolide (CPPLGA) nanoparticles that are mixed in an appropriately prepared blood clot (BC). Parallelly were analysed defects filled with fragmented adipose tissue (FAT) instead of ASCs, with CP-PLGA in BC, and only with nanoparticles. Bone density in defects was measured after I, III and VI weeks, and histological examination was done after IV and VIII weeks after filling defects. Approach to assisted osteoregeneration which is based on the use of fresh non-induced ASCs has proven to be promising due to the favorable effect on bone regeneration and simplicity of their application.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Osteogenic potential of freshly isolated cells of adiposederived mesenchymal fraction applied with nanoparticles",
pages = "45-45",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7419"
}

Najman, S., Petrović, D., Vučković, I., Živković, J., Stojanović, S., Ignjatović, N. L.,& Uskoković, D.. (2013). Osteogenic potential of freshly isolated cells of adiposederived mesenchymal fraction applied with nanoparticles. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 45-45.
https://hdl.handle.net/21.15107/rcub_vinar_7419

Najman S, Petrović D, Vučković I, Živković J, Stojanović S, Ignjatović NL, Uskoković D. Osteogenic potential of freshly isolated cells of adiposederived mesenchymal fraction applied with nanoparticles. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:45-45.
https://hdl.handle.net/21.15107/rcub_vinar_7419 .

Najman, Stevo, Petrović, Dragan, Vučković, Ivan, Živković, J., Stojanović, S., Ignjatović, Nenad L., Uskoković, Dragan, "Osteogenic potential of freshly isolated cells of adiposederived mesenchymal fraction applied with nanoparticles" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):45-45,
https://hdl.handle.net/21.15107/rcub_vinar_7419 .

TY  - CONF
AU  - Stojanović, S.
AU  - Najman, Stevo
AU  - Ajduković, Zorica
AU  - Ignjatović, Nenad L.
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/458
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7445
AB  - The aim of this study was to compare the effects of two types of nanomaterials, cobalt-exchanged hydroxyapatite (CoHAp) and calcium phosphate/poly-(DL-lactide-co-glycolide) (CP/PLGA), on the viability of Saos-2 osteoblast-like cells, using MTT test. We have examined the suspension of this materials in the following concentrations: 1.6, 8, 40, 200, 1000 and 2500 μg/ml, as well as extracts in concentration range from 2,5% to 100%. Both materials showed cytotoxic effect at higher concentrations of suspension and extract, respectively, but they were not cytotoxic at lower concentrations. CP/PLGA acted stronger cytotoxic compared to CoHAp, regardless of whether it is examined suspension or extract. CoHAp in small concentrations of suspension and extract acted slightly stimulatory on cells. This suggests that CoHAp may have advantage for use in the in vivo systems.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
T1  - Comparative study of the effects of different nanomaterials on the viability of human osteoblast-like cells
SP  - 126
EP  - 126
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7445
ER  - 

@conference{
author = "Stojanović, S. and Najman, Stevo and Ajduković, Zorica and Ignjatović, Nenad L. and Uskoković, Dragan",
year = "2012",
abstract = "The aim of this study was to compare the effects of two types of nanomaterials, cobalt-exchanged hydroxyapatite (CoHAp) and calcium phosphate/poly-(DL-lactide-co-glycolide) (CP/PLGA), on the viability of Saos-2 osteoblast-like cells, using MTT test. We have examined the suspension of this materials in the following concentrations: 1.6, 8, 40, 200, 1000 and 2500 μg/ml, as well as extracts in concentration range from 2,5% to 100%. Both materials showed cytotoxic effect at higher concentrations of suspension and extract, respectively, but they were not cytotoxic at lower concentrations. CP/PLGA acted stronger cytotoxic compared to CoHAp, regardless of whether it is examined suspension or extract. CoHAp in small concentrations of suspension and extract acted slightly stimulatory on cells. This suggests that CoHAp may have advantage for use in the in vivo systems.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts",
title = "Comparative study of the effects of different nanomaterials on the viability of human osteoblast-like cells",
pages = "126-126",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7445"
}

Stojanović, S., Najman, S., Ajduković, Z., Ignjatović, N. L.,& Uskoković, D.. (2012). Comparative study of the effects of different nanomaterials on the viability of human osteoblast-like cells. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 126-126.
https://hdl.handle.net/21.15107/rcub_vinar_7445

Stojanović S, Najman S, Ajduković Z, Ignjatović NL, Uskoković D. Comparative study of the effects of different nanomaterials on the viability of human osteoblast-like cells. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:126-126.
https://hdl.handle.net/21.15107/rcub_vinar_7445 .

Stojanović, S., Najman, Stevo, Ajduković, Zorica, Ignjatović, Nenad L., Uskoković, Dragan, "Comparative study of the effects of different nanomaterials on the viability of human osteoblast-like cells" in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):126-126,
https://hdl.handle.net/21.15107/rcub_vinar_7445 .