TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka
AU  - Uskoković-Marković, Snežana M.
AU  - Bajuk-Bogdanović, Danica
AU  - Pavlović, Vladimir
AU  - Tosić, Dragana
AU  - Milenković, Marina
AU  - Todorović-Marković, Biljana
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4787
AB  - Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coil, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study
EP  - 167
SP  - 157
VL  - 213
DO  - 10.1016/j.matchemphys.2018.04.011
ER  - 

@article{
author = "Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka and Uskoković-Marković, Snežana M. and Bajuk-Bogdanović, Danica and Pavlović, Vladimir and Tosić, Dragana and Milenković, Marina and Todorović-Marković, Biljana",
year = "2018",
abstract = "Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coil, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study",
pages = "167-157",
volume = "213",
doi = "10.1016/j.matchemphys.2018.04.011"
}

Jovanović, S. P., Holclajtner-Antunović, I., Uskoković-Marković, S. M., Bajuk-Bogdanović, D., Pavlović, V., Tosić, D., Milenković, M.,& Todorović-Marković, B.. (2018). Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 213, 157-167.
https://doi.org/10.1016/j.matchemphys.2018.04.011

Jovanović SP, Holclajtner-Antunović I, Uskoković-Marković SM, Bajuk-Bogdanović D, Pavlović V, Tosić D, Milenković M, Todorović-Marković B. Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics. 2018;213:157-167.
doi:10.1016/j.matchemphys.2018.04.011 .

Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka, Uskoković-Marković, Snežana M., Bajuk-Bogdanović, Danica, Pavlović, Vladimir, Tosić, Dragana, Milenković, Marina, Todorović-Marković, Biljana, "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study" in Materials Chemistry and Physics, 213 (2018):157-167,
https://doi.org/10.1016/j.matchemphys.2018.04.011 . .

TY  - CONF
AU  - Prekodravac, J.R.
AU  - Jovanović, S.P.
AU  - Holclajtner-Antunović, Ivanka
AU  - Perusko, Davor
AU  - Pavlović, Vladimir
AU  - Tosić, D.D.
AU  - Todorović-Marković, Biljana
AU  - Marković, Z.M.
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3475
AB  - In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.
PB  - IOP Publishing Ltd, Bristol
C3  - Physica Scripta
T1  - Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014030
ER  - 

@conference{
author = "Prekodravac, J.R. and Jovanović, S.P. and Holclajtner-Antunović, Ivanka and Perusko, Davor and Pavlović, Vladimir and Tosić, D.D. and Todorović-Marković, Biljana and Marković, Z.M.",
year = "2014",
abstract = "In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Physica Scripta",
title = "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014030"
}

Prekodravac, J.R., Jovanović, S.P., Holclajtner-Antunović, I., Perusko, D., Pavlović, V., Tosić, D.D., Todorović-Marković, B.,& Marković, Z.M.. (2014). Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta
IOP Publishing Ltd, Bristol., T162.
https://doi.org/10.1088/0031-8949/2014/T162/014030

Prekodravac J, Jovanović S, Holclajtner-Antunović I, Perusko D, Pavlović V, Tosić D, Todorović-Marković B, Marković Z. Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014030 .

Prekodravac, J.R., Jovanović, S.P., Holclajtner-Antunović, Ivanka, Perusko, Davor, Pavlović, Vladimir, Tosić, D.D., Todorović-Marković, Biljana, Marković, Z.M., "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014030 . .

TY  - JOUR
AU  - Kleut, D.
AU  - Jovanović, S.
AU  - Marković, Z.
AU  - Kepić, Dejan P.
AU  - Tosić, D.
AU  - Romcević, N.
AU  - Marinović-Cincović, Milena
AU  - Dramicanin, Miroslav D.
AU  - Holclajtner-Antunović, Ivanka
AU  - Pavlović, Vladimir
AU  - Drazić, G.
AU  - Milosavljević, M.
AU  - Todorović-Marković, Biljana
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2980
AB  - A systematic study of the gamma irradiation effects on single wall carbon nanotube (SWCNT) structure was conducted. Nanotubes were exposed to different doses of gamma irradiation in three media. Irradiation was carried out in air, water and aqueous ammonia. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and Raman spectroscopy confirmed the changes in the SWCNT structure. TGA measurements showed the highest percentage of introduced groups for the SWCNTs irradiated with 100 kGy. FTIR spectroscopy provided evidence for the attachment of hydroxyl, carboxyl and nitrile functional groups to the SWCNT sidewalls. Those groups were confirmed by EA. All irradiated SWCNTs had hydroxyl and carboxyl groups irrelevant to media used for irradiation, but nitrile functional groups were only identified in SWCNTs irradiated in aqueous ammonia. Raman spectroscopy indicated that the degree of disorder in the carbon nanotube structure correlates with the irradiation dose. For the nanotubes irradiated with the dose of 100 kGy, the Raman I-D/I-G ratio was three times higher than for the pristine ones. Atomic force microscopy showed a 50% decrease in nanotube length at a radiation dose of 100 kGy. Scanning and transmission electron microscopies showed significant changes in the morphology and structure of gamma irradiated SWCNTs.
PB  - Elsevier Science Inc, New York
T2  - Materials Characterization
T1  - Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose
EP  - 45
SP  - 37
VL  - 72
DO  - 10.1016/j.matchar.2012.07.002
ER  - 

@article{
author = "Kleut, D. and Jovanović, S. and Marković, Z. and Kepić, Dejan P. and Tosić, D. and Romcević, N. and Marinović-Cincović, Milena and Dramicanin, Miroslav D. and Holclajtner-Antunović, Ivanka and Pavlović, Vladimir and Drazić, G. and Milosavljević, M. and Todorović-Marković, Biljana",
year = "2012",
abstract = "A systematic study of the gamma irradiation effects on single wall carbon nanotube (SWCNT) structure was conducted. Nanotubes were exposed to different doses of gamma irradiation in three media. Irradiation was carried out in air, water and aqueous ammonia. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and Raman spectroscopy confirmed the changes in the SWCNT structure. TGA measurements showed the highest percentage of introduced groups for the SWCNTs irradiated with 100 kGy. FTIR spectroscopy provided evidence for the attachment of hydroxyl, carboxyl and nitrile functional groups to the SWCNT sidewalls. Those groups were confirmed by EA. All irradiated SWCNTs had hydroxyl and carboxyl groups irrelevant to media used for irradiation, but nitrile functional groups were only identified in SWCNTs irradiated in aqueous ammonia. Raman spectroscopy indicated that the degree of disorder in the carbon nanotube structure correlates with the irradiation dose. For the nanotubes irradiated with the dose of 100 kGy, the Raman I-D/I-G ratio was three times higher than for the pristine ones. Atomic force microscopy showed a 50% decrease in nanotube length at a radiation dose of 100 kGy. Scanning and transmission electron microscopies showed significant changes in the morphology and structure of gamma irradiated SWCNTs.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose",
pages = "45-37",
volume = "72",
doi = "10.1016/j.matchar.2012.07.002"
}

Kleut, D., Jovanović, S., Marković, Z., Kepić, D. P., Tosić, D., Romcević, N., Marinović-Cincović, M., Dramicanin, M. D., Holclajtner-Antunović, I., Pavlović, V., Drazić, G., Milosavljević, M.,& Todorović-Marković, B.. (2012). Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose. in Materials Characterization
Elsevier Science Inc, New York., 72, 37-45.
https://doi.org/10.1016/j.matchar.2012.07.002

Kleut D, Jovanović S, Marković Z, Kepić DP, Tosić D, Romcević N, Marinović-Cincović M, Dramicanin MD, Holclajtner-Antunović I, Pavlović V, Drazić G, Milosavljević M, Todorović-Marković B. Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose. in Materials Characterization. 2012;72:37-45.
doi:10.1016/j.matchar.2012.07.002 .

Kleut, D., Jovanović, S., Marković, Z., Kepić, Dejan P., Tosić, D., Romcević, N., Marinović-Cincović, Milena, Dramicanin, Miroslav D., Holclajtner-Antunović, Ivanka, Pavlović, Vladimir, Drazić, G., Milosavljević, M., Todorović-Marković, Biljana, "Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose" in Materials Characterization, 72 (2012):37-45,
https://doi.org/10.1016/j.matchar.2012.07.002 . .