TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Branković, Dušan
AU  - Milivojević, Dušan
AU  - Jagličić, Zvonko
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9646
AB  - Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 nanoparticles (NPs) with y = 0.93, 1.20 and 1.34 dispersed in an amorphous SiO2 matrix were prepared by a sol-gel method. The average crystallite size DXRD of about 25 nm determined by X-ray diffraction (XRD) agrees well with the average particle size observed in transmission electron microscopy (TEM). Dynamic magnetic susceptibility measurements indicate a spin-glass-like behavior of the nanoparticles below the spin-glass (SG) transition temperature TC < 10 K. Field dependent magnetization exhibits weak ferromagnetism and shift of the magnetic hysteresis loop. On the basis of the observed magnetic properties, we propose a model of the core-shell structure of the Co1+yAl2-yO4 nanoparticles with the spin-glass phase in the core and weak ferromagnetism in the shell. The exchange bias field disappears above the spin-glass transition temperature TC, whereas the weak ferromagnetism persists also at temperatures above TC. The component of weak ferromagnetism is associated with the presence of Co vacancies in the nanoparticle spinel crystal lattice.
T2  - Journal of Alloys and Compounds
T1  - Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites
VL  - 853
SP  - 155933
DO  - 10.1016/j.jallcom.2020.155933
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Branković, Dušan and Milivojević, Dušan and Jagličić, Zvonko",
year = "2021",
abstract = "Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 nanoparticles (NPs) with y = 0.93, 1.20 and 1.34 dispersed in an amorphous SiO2 matrix were prepared by a sol-gel method. The average crystallite size DXRD of about 25 nm determined by X-ray diffraction (XRD) agrees well with the average particle size observed in transmission electron microscopy (TEM). Dynamic magnetic susceptibility measurements indicate a spin-glass-like behavior of the nanoparticles below the spin-glass (SG) transition temperature TC < 10 K. Field dependent magnetization exhibits weak ferromagnetism and shift of the magnetic hysteresis loop. On the basis of the observed magnetic properties, we propose a model of the core-shell structure of the Co1+yAl2-yO4 nanoparticles with the spin-glass phase in the core and weak ferromagnetism in the shell. The exchange bias field disappears above the spin-glass transition temperature TC, whereas the weak ferromagnetism persists also at temperatures above TC. The component of weak ferromagnetism is associated with the presence of Co vacancies in the nanoparticle spinel crystal lattice.",
journal = "Journal of Alloys and Compounds",
title = "Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites",
volume = "853",
pages = "155933",
doi = "10.1016/j.jallcom.2020.155933"
}

Babić-Stojić, B. S., Branković, D., Milivojević, D.,& Jagličić, Z.. (2021). Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites. in Journal of Alloys and Compounds, 853, 155933.
https://doi.org/10.1016/j.jallcom.2020.155933

Babić-Stojić BS, Branković D, Milivojević D, Jagličić Z. Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites. in Journal of Alloys and Compounds. 2021;853:155933.
doi:10.1016/j.jallcom.2020.155933 .

Babić-Stojić, Branka S., Branković, Dušan, Milivojević, Dušan, Jagličić, Zvonko, "Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites" in Journal of Alloys and Compounds, 853 (2021):155933,
https://doi.org/10.1016/j.jallcom.2020.155933 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Milivojević, Dušan
AU  - Pozek, Miroslav
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Jović Orsini, Nataša
AU  - Marković, Mirjana
AU  - Arsikin, Katarina M.
AU  - Paunović, Verica G.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1889
AB  - Ultrasmall iron oxide (USPIO) nanoparticles, with diameter mostly less than 3 nm dispersed in an organic carrier fluid were synthesized by polyol route. The evolution of ZFC-FC magnetization curves with temperature, as well as the shift of the ac susceptibility peaks upon changing the frequency, reveal that the nanoparticles in the fluid are non-interacting and superparamagnetic with the blocking temperature T-B similar to 10 K. The Mossbauer spectra analysis proposed the core/shell structure of the nanoparticles consisting of stoichiometric gamma-Fe2O3 core and non-stoichiometric shell. The nanoparticle surface layer has a great influence on their properties which is principally manifested in significant reduction of the magnetization and in a large increase in magnetic anisotropy. Magnetic moments do not saturate in fields up to 5 T, even at the lowest measured temperature, T = 5 K. The average magnetic particle diameter is changed from 1.3 to 1.8 nm with increasing magnetic field from 0 to 5 T which is noticeably smaller than the particle sizes measured by TEM. The estimated effective magnetic anisotropy constant value, K-eff = 2 x 10(5) J/m(3), is two orders of magnitude higher than in the bulk maghemite. Measurements of the longitudinal and transverse NMR relaxivity parameters on water diluted nanoparticle dispersions at 1.5 T gave the values r(1) = 0.028 mmol(-1) s(-1), r(2) = 0.050 mmol(-1) s(-1) and their ratio r(2)/r(1) = 1.8. Continuous increase of the T-1-weighted MRI signal intensity with increasing Fe concentration in the nanoparticle dispersions was observed which makes this ferrofluid to behave as a positive T-1 contrast agent. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Current Applied Physics
T1  - Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties
VL  - 18
IS  - 2
SP  - 141
EP  - 149
DO  - 10.1016/j.cap.2017.11.017
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Milivojević, Dušan and Pozek, Miroslav and Jagličić, Zvonko and Makovec, Darko and Jović Orsini, Nataša and Marković, Mirjana and Arsikin, Katarina M. and Paunović, Verica G.",
year = "2018",
abstract = "Ultrasmall iron oxide (USPIO) nanoparticles, with diameter mostly less than 3 nm dispersed in an organic carrier fluid were synthesized by polyol route. The evolution of ZFC-FC magnetization curves with temperature, as well as the shift of the ac susceptibility peaks upon changing the frequency, reveal that the nanoparticles in the fluid are non-interacting and superparamagnetic with the blocking temperature T-B similar to 10 K. The Mossbauer spectra analysis proposed the core/shell structure of the nanoparticles consisting of stoichiometric gamma-Fe2O3 core and non-stoichiometric shell. The nanoparticle surface layer has a great influence on their properties which is principally manifested in significant reduction of the magnetization and in a large increase in magnetic anisotropy. Magnetic moments do not saturate in fields up to 5 T, even at the lowest measured temperature, T = 5 K. The average magnetic particle diameter is changed from 1.3 to 1.8 nm with increasing magnetic field from 0 to 5 T which is noticeably smaller than the particle sizes measured by TEM. The estimated effective magnetic anisotropy constant value, K-eff = 2 x 10(5) J/m(3), is two orders of magnitude higher than in the bulk maghemite. Measurements of the longitudinal and transverse NMR relaxivity parameters on water diluted nanoparticle dispersions at 1.5 T gave the values r(1) = 0.028 mmol(-1) s(-1), r(2) = 0.050 mmol(-1) s(-1) and their ratio r(2)/r(1) = 1.8. Continuous increase of the T-1-weighted MRI signal intensity with increasing Fe concentration in the nanoparticle dispersions was observed which makes this ferrofluid to behave as a positive T-1 contrast agent. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Current Applied Physics",
title = "Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties",
volume = "18",
number = "2",
pages = "141-149",
doi = "10.1016/j.cap.2017.11.017"
}

Babić-Stojić, B. S., Jokanović, V. R., Milivojević, D., Pozek, M., Jagličić, Z., Makovec, D., Jović Orsini, N., Marković, M., Arsikin, K. M.,& Paunović, V. G.. (2018). Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties. in Current Applied Physics, 18(2), 141-149.
https://doi.org/10.1016/j.cap.2017.11.017

Babić-Stojić BS, Jokanović VR, Milivojević D, Pozek M, Jagličić Z, Makovec D, Jović Orsini N, Marković M, Arsikin KM, Paunović VG. Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties. in Current Applied Physics. 2018;18(2):141-149.
doi:10.1016/j.cap.2017.11.017 .

Babić-Stojić, Branka S., Jokanović, Vukoman R., Milivojević, Dušan, Pozek, Miroslav, Jagličić, Zvonko, Makovec, Darko, Jović Orsini, Nataša, Marković, Mirjana, Arsikin, Katarina M., Paunović, Verica G., "Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties" in Current Applied Physics, 18, no. 2 (2018):141-149,
https://doi.org/10.1016/j.cap.2017.11.017 . .

TY  - JOUR
AU  - Jović Orsini, Nataša
AU  - Babić-Stojić, Branka S.
AU  - Spasojević, Vojislav
AU  - Calatayud, Maria Pilar
AU  - Cvjetićanin, Nikola
AU  - Goya, Gerardo F.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1835
AB  - Iron oxide magnetic nanoparticles with diameters d, 7 nm LT = d LT = 12 nm, were synthesized by thermal decomposition of Fe(acac)(3). Different experimental conditions, keeping constant concetration of Fe ions in solvent, showed that the heating rates is the most important parameter determining the final particle size. Use of two different solvents, 1-eicosene and 1-octadecene, yielded similar nanoparticle sizes (7.1 nm LT = d LT = 7.5 nm), but different magnetic anisotropies. All samples were superparamagnetic at room temperature. Spin disordering was inferred in samples coated with trioctylphosphine oxide (TOPO) co-ligand in addition to oleic acid and oleyamine. The heating ability of similar to 12 nm-sized nanoparticles dispersed in hexane under alternating magnetic fields (3.98 kA/m LT = H-0 LT = 23.87 kA/m; 229.3 kHz LT = f LT = 828 kHz) has been studied, finding a nearly quadratic dependence upon H-0, as expected from the linear response theory. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic and power absorption measurements on iron oxide nanoparticles synthesized by thermal decomposition of Fe(acac)(3)
VL  - 449
SP  - 286
EP  - 296
DO  - 10.1016/j.jmmm.2017.10.053
ER  - 

@article{
author = "Jović Orsini, Nataša and Babić-Stojić, Branka S. and Spasojević, Vojislav and Calatayud, Maria Pilar and Cvjetićanin, Nikola and Goya, Gerardo F.",
year = "2018",
abstract = "Iron oxide magnetic nanoparticles with diameters d, 7 nm LT = d LT = 12 nm, were synthesized by thermal decomposition of Fe(acac)(3). Different experimental conditions, keeping constant concetration of Fe ions in solvent, showed that the heating rates is the most important parameter determining the final particle size. Use of two different solvents, 1-eicosene and 1-octadecene, yielded similar nanoparticle sizes (7.1 nm LT = d LT = 7.5 nm), but different magnetic anisotropies. All samples were superparamagnetic at room temperature. Spin disordering was inferred in samples coated with trioctylphosphine oxide (TOPO) co-ligand in addition to oleic acid and oleyamine. The heating ability of similar to 12 nm-sized nanoparticles dispersed in hexane under alternating magnetic fields (3.98 kA/m LT = H-0 LT = 23.87 kA/m; 229.3 kHz LT = f LT = 828 kHz) has been studied, finding a nearly quadratic dependence upon H-0, as expected from the linear response theory. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic and power absorption measurements on iron oxide nanoparticles synthesized by thermal decomposition of Fe(acac)(3)",
volume = "449",
pages = "286-296",
doi = "10.1016/j.jmmm.2017.10.053"
}

Jović Orsini, N., Babić-Stojić, B. S., Spasojević, V., Calatayud, M. P., Cvjetićanin, N.,& Goya, G. F.. (2018). Magnetic and power absorption measurements on iron oxide nanoparticles synthesized by thermal decomposition of Fe(acac)(3). in Journal of Magnetism and Magnetic Materials, 449, 286-296.
https://doi.org/10.1016/j.jmmm.2017.10.053

Jović Orsini N, Babić-Stojić BS, Spasojević V, Calatayud MP, Cvjetićanin N, Goya GF. Magnetic and power absorption measurements on iron oxide nanoparticles synthesized by thermal decomposition of Fe(acac)(3). in Journal of Magnetism and Magnetic Materials. 2018;449:286-296.
doi:10.1016/j.jmmm.2017.10.053 .

Jović Orsini, Nataša, Babić-Stojić, Branka S., Spasojević, Vojislav, Calatayud, Maria Pilar, Cvjetićanin, Nikola, Goya, Gerardo F., "Magnetic and power absorption measurements on iron oxide nanoparticles synthesized by thermal decomposition of Fe(acac)(3)" in Journal of Magnetism and Magnetic Materials, 449 (2018):286-296,
https://doi.org/10.1016/j.jmmm.2017.10.053 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Milivojević, Dušan
AU  - Pozek, Miroslav
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Arsikin, Katarina M.
AU  - Paunović, Verica G.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/857
AB  - Gd2O3 nanoparticles of a few nm in size and their agglomerates dispersed in dextrose derived polymer template were synthesized by hydrothermal treatment. The produced nanosized material was investigated by TEM, FTIR spectroscopy, SQUID measurements and NMR relaxometry. Biological evaluation of this material was done by crystal violet and MTT assays to determine the cell viability. Longitudinal and transverse NMR relaxivities of water diluted Gd2O3 nanoparticle dispersions measured at the magnetic field of 1.5 T, estimated to be r(1)(Gd2O3)=9.6 s(-1) mM(-1) in the Gd concentration range 0.1-30 mM and r(2)(Gd2O3)=17.7 s(-1) mM(-1) in the lower concentration range 0.1-0.8 mM, are significantly higher than the corresponding relaxivities measured for the standard contrast agent r1 (Gd-DTPA)=4.1 s(-1) mM(-1) and r(2)(Gd-DTPA)= 5.1 s(-1) mM(-1). The ratio of the two relaxivities for Gd2O3 nanoparticles r(2)/r(1) = 1.8 is suitable for T-1-weighted imaging. Good MRI signal intensities of the water diluted Gd2O3 nanoparticle dispersions were recorded at lower Gd concentrations 0.2-0.8 mM. The Gd2O3 samples did not exert any significant cytotoxic effects at Gd concentrations of 0.2 mM and below. These properties of the produced Gd2O3 nanoparticles in hydrothermally modified dextrose make them promising for potential application in MRI for the design of a positive MRI contrast agent. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Gd2O3 nanoparticles stabilized by hydrothermally modified dextrose for positive contrast magnetic resonance imaging
VL  - 403
SP  - 118
EP  - 126
DO  - 10.1016/j.jmmm.2015.11.075
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Milivojević, Dušan and Pozek, Miroslav and Jagličić, Zvonko and Makovec, Darko and Arsikin, Katarina M. and Paunović, Verica G.",
year = "2016",
abstract = "Gd2O3 nanoparticles of a few nm in size and their agglomerates dispersed in dextrose derived polymer template were synthesized by hydrothermal treatment. The produced nanosized material was investigated by TEM, FTIR spectroscopy, SQUID measurements and NMR relaxometry. Biological evaluation of this material was done by crystal violet and MTT assays to determine the cell viability. Longitudinal and transverse NMR relaxivities of water diluted Gd2O3 nanoparticle dispersions measured at the magnetic field of 1.5 T, estimated to be r(1)(Gd2O3)=9.6 s(-1) mM(-1) in the Gd concentration range 0.1-30 mM and r(2)(Gd2O3)=17.7 s(-1) mM(-1) in the lower concentration range 0.1-0.8 mM, are significantly higher than the corresponding relaxivities measured for the standard contrast agent r1 (Gd-DTPA)=4.1 s(-1) mM(-1) and r(2)(Gd-DTPA)= 5.1 s(-1) mM(-1). The ratio of the two relaxivities for Gd2O3 nanoparticles r(2)/r(1) = 1.8 is suitable for T-1-weighted imaging. Good MRI signal intensities of the water diluted Gd2O3 nanoparticle dispersions were recorded at lower Gd concentrations 0.2-0.8 mM. The Gd2O3 samples did not exert any significant cytotoxic effects at Gd concentrations of 0.2 mM and below. These properties of the produced Gd2O3 nanoparticles in hydrothermally modified dextrose make them promising for potential application in MRI for the design of a positive MRI contrast agent. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Gd2O3 nanoparticles stabilized by hydrothermally modified dextrose for positive contrast magnetic resonance imaging",
volume = "403",
pages = "118-126",
doi = "10.1016/j.jmmm.2015.11.075"
}

Babić-Stojić, B. S., Jokanović, V. R., Milivojević, D., Pozek, M., Jagličić, Z., Makovec, D., Arsikin, K. M.,& Paunović, V. G.. (2016). Gd2O3 nanoparticles stabilized by hydrothermally modified dextrose for positive contrast magnetic resonance imaging. in Journal of Magnetism and Magnetic Materials, 403, 118-126.
https://doi.org/10.1016/j.jmmm.2015.11.075

Babić-Stojić BS, Jokanović VR, Milivojević D, Pozek M, Jagličić Z, Makovec D, Arsikin KM, Paunović VG. Gd2O3 nanoparticles stabilized by hydrothermally modified dextrose for positive contrast magnetic resonance imaging. in Journal of Magnetism and Magnetic Materials. 2016;403:118-126.
doi:10.1016/j.jmmm.2015.11.075 .

Babić-Stojić, Branka S., Jokanović, Vukoman R., Milivojević, Dušan, Pozek, Miroslav, Jagličić, Zvonko, Makovec, Darko, Arsikin, Katarina M., Paunović, Verica G., "Gd2O3 nanoparticles stabilized by hydrothermally modified dextrose for positive contrast magnetic resonance imaging" in Journal of Magnetism and Magnetic Materials, 403 (2016):118-126,
https://doi.org/10.1016/j.jmmm.2015.11.075 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Jović, Nataša G.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5912
AB  - The work presents structural and magnetic properties of ultrasmall magnetic nanoparticles consisting of inorganic iron oxide core and organic ester shell, dispersed in an organic fluid, synthesized via polyol route. The structure analysis shows that nanoparticles are crystalline, less than 3 nm in size, mutually clearly separated. The magnetic properties are in accordance with the size of the nanoparticles and do not indicate interparticle interactions. The particles show pure superparamagnetic behavior with very low blocking temperature. ZFCFC bifurcation and ac susceptibility peaks are at temperatures T-B LT 12 K. The properties of fluid were compared with dried powder sample. Drying of fluid brings about interactions between the magnetic nanoparticles that considerably affect spin dynamics of the particles. The surface of nanoparticles has a significant influence on their behavior. The Mssbauer parameters indicate existence of gamma-Fe2O3 core and non-stoichiometric surface layer. Magnetic field dependent magnetization analysis suggests smaller apparent size of the particles d(0) = 0.56 nm. High magnetic anisotropy due to surface layer anisotropy was measured to be of the order 10(6) erg/cm(3) that is two orders of magnitude higher than that in bulk material. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Magnetic properties of ultrasmall iron-oxide nanoparticles
VL  - 595
SP  - 153
EP  - 157
DO  - 10.1016/j.jallcom.2014.01.112
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Makovec, Darko and Jović, Nataša G.",
year = "2014",
abstract = "The work presents structural and magnetic properties of ultrasmall magnetic nanoparticles consisting of inorganic iron oxide core and organic ester shell, dispersed in an organic fluid, synthesized via polyol route. The structure analysis shows that nanoparticles are crystalline, less than 3 nm in size, mutually clearly separated. The magnetic properties are in accordance with the size of the nanoparticles and do not indicate interparticle interactions. The particles show pure superparamagnetic behavior with very low blocking temperature. ZFCFC bifurcation and ac susceptibility peaks are at temperatures T-B LT 12 K. The properties of fluid were compared with dried powder sample. Drying of fluid brings about interactions between the magnetic nanoparticles that considerably affect spin dynamics of the particles. The surface of nanoparticles has a significant influence on their behavior. The Mssbauer parameters indicate existence of gamma-Fe2O3 core and non-stoichiometric surface layer. Magnetic field dependent magnetization analysis suggests smaller apparent size of the particles d(0) = 0.56 nm. High magnetic anisotropy due to surface layer anisotropy was measured to be of the order 10(6) erg/cm(3) that is two orders of magnitude higher than that in bulk material. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Magnetic properties of ultrasmall iron-oxide nanoparticles",
volume = "595",
pages = "153-157",
doi = "10.1016/j.jallcom.2014.01.112"
}

Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z., Makovec, D.,& Jović, N. G.. (2014). Magnetic properties of ultrasmall iron-oxide nanoparticles. in Journal of Alloys and Compounds, 595, 153-157.
https://doi.org/10.1016/j.jallcom.2014.01.112

Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Makovec D, Jović NG. Magnetic properties of ultrasmall iron-oxide nanoparticles. in Journal of Alloys and Compounds. 2014;595:153-157.
doi:10.1016/j.jallcom.2014.01.112 .

Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Makovec, Darko, Jović, Nataša G., "Magnetic properties of ultrasmall iron-oxide nanoparticles" in Journal of Alloys and Compounds, 595 (2014):153-157,
https://doi.org/10.1016/j.jallcom.2014.01.112 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Milivojević, Dušan
AU  - Pozek, Miroslav
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Arsikin, Katarina M.
AU  - Paunović, Verica G.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/414
AB  - Gd2O3 nanoparticles and their agglomerates from approximately 10 to 80 nm in size suspended in an organic liquid were synthesized via polyol route. The reaction between diethylene glycol and added acetic acid, which occurred simultaneously with the synthesis of Gd2O3 nanoparticles, was catalyzed by sodium bisulfate to transform as much as possible diethylene glycol in corresponding ester at the end of complete reaction. The produced nanosized material of gadolinium oxide was investigated by TEM, DLS, FTIR spectroscopy, and NMR relaxometry. Biological evaluation of this material was done by MTT and crystal violet assays to determine the cell viability. Longitudinal and transverse relaxivities of water-diluted Gd2O3 nanoparticle suspensions estimated to be r(1) = 13.6 and r(2) = 14.7 s(-1) mM(-1) are about three times higher compared to the relaxivities obtained for standard contrast agent Gd-DTPA (Magnevist). Good MRI signal intensities of the water-diluted Gd2O3 nanoparticle suspensions were recorded in the Gd concentration range 0.2-0.3 mM for which the suspensions were not toxic exhibiting simultaneously higher signal intensities than those for Magnevist in the Gd concentration range 0.4-1 mM for which this standard contrast agent was not toxic. These properties make the produced Gd2O3 nanoparticle material promising for potential application as MRI contrast agent.
T2  - Journal of Nanoparticle Research
T1  - NMR relaxometric properties and cytotoxicity of Gd2O3 nanoparticle suspensions in an organic liquid
VL  - 16
IS  - 10
DO  - 10.1007/s11051-014-2663-0
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Milivojević, Dušan and Pozek, Miroslav and Jagličić, Zvonko and Makovec, Darko and Arsikin, Katarina M. and Paunović, Verica G.",
year = "2014",
abstract = "Gd2O3 nanoparticles and their agglomerates from approximately 10 to 80 nm in size suspended in an organic liquid were synthesized via polyol route. The reaction between diethylene glycol and added acetic acid, which occurred simultaneously with the synthesis of Gd2O3 nanoparticles, was catalyzed by sodium bisulfate to transform as much as possible diethylene glycol in corresponding ester at the end of complete reaction. The produced nanosized material of gadolinium oxide was investigated by TEM, DLS, FTIR spectroscopy, and NMR relaxometry. Biological evaluation of this material was done by MTT and crystal violet assays to determine the cell viability. Longitudinal and transverse relaxivities of water-diluted Gd2O3 nanoparticle suspensions estimated to be r(1) = 13.6 and r(2) = 14.7 s(-1) mM(-1) are about three times higher compared to the relaxivities obtained for standard contrast agent Gd-DTPA (Magnevist). Good MRI signal intensities of the water-diluted Gd2O3 nanoparticle suspensions were recorded in the Gd concentration range 0.2-0.3 mM for which the suspensions were not toxic exhibiting simultaneously higher signal intensities than those for Magnevist in the Gd concentration range 0.4-1 mM for which this standard contrast agent was not toxic. These properties make the produced Gd2O3 nanoparticle material promising for potential application as MRI contrast agent.",
journal = "Journal of Nanoparticle Research",
title = "NMR relaxometric properties and cytotoxicity of Gd2O3 nanoparticle suspensions in an organic liquid",
volume = "16",
number = "10",
doi = "10.1007/s11051-014-2663-0"
}

Babić-Stojić, B. S., Jokanović, V. R., Milivojević, D., Pozek, M., Jagličić, Z., Makovec, D., Arsikin, K. M.,& Paunović, V. G.. (2014). NMR relaxometric properties and cytotoxicity of Gd2O3 nanoparticle suspensions in an organic liquid. in Journal of Nanoparticle Research, 16(10).
https://doi.org/10.1007/s11051-014-2663-0

Babić-Stojić BS, Jokanović VR, Milivojević D, Pozek M, Jagličić Z, Makovec D, Arsikin KM, Paunović VG. NMR relaxometric properties and cytotoxicity of Gd2O3 nanoparticle suspensions in an organic liquid. in Journal of Nanoparticle Research. 2014;16(10).
doi:10.1007/s11051-014-2663-0 .

Babić-Stojić, Branka S., Jokanović, Vukoman R., Milivojević, Dušan, Pozek, Miroslav, Jagličić, Zvonko, Makovec, Darko, Arsikin, Katarina M., Paunović, Verica G., "NMR relaxometric properties and cytotoxicity of Gd2O3 nanoparticle suspensions in an organic liquid" in Journal of Nanoparticle Research, 16, no. 10 (2014),
https://doi.org/10.1007/s11051-014-2663-0 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Brankovic, D.
AU  - Jović, Nataša G.
AU  - Čolović, Božana M.
AU  - Čupić, Svetlana D.
AU  - Kojić, Dušan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5471
AB  - The magnetic properties of mesoscopic materials are modified by size and surface effects. We present a sol-gel method used to tailor these effects, and illustrate it on Co1+yAl2-yO4 spinel. Nanocomposites made of spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized. Samples with various mass fractions -x of Co1+yAl2-yO4 in composite, ranging from predominantly SiO2 (x = 10 wt%) to predominantly spinel (x = 95 wt%), and with various Co concentrations in spinel y were studied. The spinel grain sizes were below 100 nm with a large size distribution, for samples with predominant spinel phase. Those samples showed Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta approximate to -100 K). The grain sizes of spinel stays confined in 100 nm range even in the spinel samples diluted with as low as 5 wt% concentration of amorphous SiO2. For the samples with predominant SiO2 the crystalline nanoparticles are well separated and of size of around 100 nm, but with presence of much smaller spinel nanoparticles of about 10 nm. The magnetic properties of the samples with predominant silica phase showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.
T2  - Science of Sintering
T1  - Sol-gel as a Method to Tailor the Magnetic Properties of Co1+yAl2-yO4
VL  - 45
IS  - 1
SP  - 69
EP  - 78
DO  - 10.2298/SOS1301069M
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Brankovic, D. and Jović, Nataša G. and Čolović, Božana M. and Čupić, Svetlana D. and Kojić, Dušan",
year = "2013",
abstract = "The magnetic properties of mesoscopic materials are modified by size and surface effects. We present a sol-gel method used to tailor these effects, and illustrate it on Co1+yAl2-yO4 spinel. Nanocomposites made of spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized. Samples with various mass fractions -x of Co1+yAl2-yO4 in composite, ranging from predominantly SiO2 (x = 10 wt%) to predominantly spinel (x = 95 wt%), and with various Co concentrations in spinel y were studied. The spinel grain sizes were below 100 nm with a large size distribution, for samples with predominant spinel phase. Those samples showed Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta approximate to -100 K). The grain sizes of spinel stays confined in 100 nm range even in the spinel samples diluted with as low as 5 wt% concentration of amorphous SiO2. For the samples with predominant SiO2 the crystalline nanoparticles are well separated and of size of around 100 nm, but with presence of much smaller spinel nanoparticles of about 10 nm. The magnetic properties of the samples with predominant silica phase showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.",
journal = "Science of Sintering",
title = "Sol-gel as a Method to Tailor the Magnetic Properties of Co1+yAl2-yO4",
volume = "45",
number = "1",
pages = "69-78",
doi = "10.2298/SOS1301069M"
}

Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z., Brankovic, D., Jović, N. G., Čolović, B. M., Čupić, S. D.,& Kojić, D.. (2013). Sol-gel as a Method to Tailor the Magnetic Properties of Co1+yAl2-yO4. in Science of Sintering, 45(1), 69-78.
https://doi.org/10.2298/SOS1301069M

Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Brankovic D, Jović NG, Čolović BM, Čupić SD, Kojić D. Sol-gel as a Method to Tailor the Magnetic Properties of Co1+yAl2-yO4. in Science of Sintering. 2013;45(1):69-78.
doi:10.2298/SOS1301069M .

Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Brankovic, D., Jović, Nataša G., Čolović, Božana M., Čupić, Svetlana D., Kojić, Dušan, "Sol-gel as a Method to Tailor the Magnetic Properties of Co1+yAl2-yO4" in Science of Sintering, 45, no. 1 (2013):69-78,
https://doi.org/10.2298/SOS1301069M . .

TY  - JOUR
AU  - Čolović, Božana M.
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5473
AB  - Release kinetics of tigecycline, a potential antibiotic in treatment of osteomyelitis, from calcium hydroxyapatite (CHA), as one of the most important ceramic materials in bone tissue engineering, was investigated in this study. Tigecycline, in solid state, was mixed with CHA powder and the obtained mixture was compressed into tablets using two different pressures. These tablets were immersed in a phosphate-buffered saline solution and tigecycline release was measured by a UV-VIS spectrophotometer. The total release time was 5 or 28 days, depending on the pressure applied during compression. It was shown that there is a close relationship between pore sizes and drug release rate. The drug release kinetics was interpreted on the base of pore sizes and pore size distribution.
T2  - Science of Sintering
T1  - Pore Geometry of Ceramic Device: the Key Factor of Drug Release Kinetics
VL  - 45
IS  - 1
SP  - 107
EP  - 116
DO  - 10.2298/SOS1301107C
ER  - 

@article{
author = "Čolović, Božana M. and Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R.",
year = "2013",
abstract = "Release kinetics of tigecycline, a potential antibiotic in treatment of osteomyelitis, from calcium hydroxyapatite (CHA), as one of the most important ceramic materials in bone tissue engineering, was investigated in this study. Tigecycline, in solid state, was mixed with CHA powder and the obtained mixture was compressed into tablets using two different pressures. These tablets were immersed in a phosphate-buffered saline solution and tigecycline release was measured by a UV-VIS spectrophotometer. The total release time was 5 or 28 days, depending on the pressure applied during compression. It was shown that there is a close relationship between pore sizes and drug release rate. The drug release kinetics was interpreted on the base of pore sizes and pore size distribution.",
journal = "Science of Sintering",
title = "Pore Geometry of Ceramic Device: the Key Factor of Drug Release Kinetics",
volume = "45",
number = "1",
pages = "107-116",
doi = "10.2298/SOS1301107C"
}

Čolović, B. M., Milivojević, D., Babić-Stojić, B. S.,& Jokanović, V. R.. (2013). Pore Geometry of Ceramic Device: the Key Factor of Drug Release Kinetics. in Science of Sintering, 45(1), 107-116.
https://doi.org/10.2298/SOS1301107C

Čolović BM, Milivojević D, Babić-Stojić BS, Jokanović VR. Pore Geometry of Ceramic Device: the Key Factor of Drug Release Kinetics. in Science of Sintering. 2013;45(1):107-116.
doi:10.2298/SOS1301107C .

Čolović, Božana M., Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., "Pore Geometry of Ceramic Device: the Key Factor of Drug Release Kinetics" in Science of Sintering, 45, no. 1 (2013):107-116,
https://doi.org/10.2298/SOS1301107C . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Milivojević, Dušan
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Jović, Nataša G.
AU  - Marinović-Cincović, Milena
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5563
AB  - We present a study of dynamic magnetic properties of superparamagnetic CoFe2O4 nanoparticles of average size 5.9 nm suspended in an organic liquid. The relaxation times of the particle magnetic moments are found to be strongly dependent on the size of the particles, and also considerably dependent on interparticle interactions. Besides the lower frequency peak, an additional much faster relaxation is observed in the frequency dependence of the imaginary part of the ac magnetic susceptibility below the freezing point of the liquid. It is found that a large contribution to the magnetic relaxation of the lower frequency peak originates from the particles of dimensions 6.3-5.1 nm with interparticle interactions in the range 25-82 K, which correspond to nearer-neighbor particles. Much faster relaxation indicates that its significant part arises from the particles of dimensions 5.8-5.0 nm with interactions in the range 1-52 K which include also more distant neighbors. (C) 2013 AIP Publishing LLC.
T2  - Journal of Applied Physics
T1  - Magnetic properties and magnetic relaxation in a suspension of CoFe2O4 nanoparticles
VL  - 113
IS  - 23
DO  - 10.1063/1.4811537
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Milivojević, Dušan and Jagličić, Zvonko and Makovec, Darko and Jović, Nataša G. and Marinović-Cincović, Milena",
year = "2013",
abstract = "We present a study of dynamic magnetic properties of superparamagnetic CoFe2O4 nanoparticles of average size 5.9 nm suspended in an organic liquid. The relaxation times of the particle magnetic moments are found to be strongly dependent on the size of the particles, and also considerably dependent on interparticle interactions. Besides the lower frequency peak, an additional much faster relaxation is observed in the frequency dependence of the imaginary part of the ac magnetic susceptibility below the freezing point of the liquid. It is found that a large contribution to the magnetic relaxation of the lower frequency peak originates from the particles of dimensions 6.3-5.1 nm with interparticle interactions in the range 25-82 K, which correspond to nearer-neighbor particles. Much faster relaxation indicates that its significant part arises from the particles of dimensions 5.8-5.0 nm with interactions in the range 1-52 K which include also more distant neighbors. (C) 2013 AIP Publishing LLC.",
journal = "Journal of Applied Physics",
title = "Magnetic properties and magnetic relaxation in a suspension of CoFe2O4 nanoparticles",
volume = "113",
number = "23",
doi = "10.1063/1.4811537"
}

Babić-Stojić, B. S., Jokanović, V. R., Milivojević, D., Jagličić, Z., Makovec, D., Jović, N. G.,& Marinović-Cincović, M.. (2013). Magnetic properties and magnetic relaxation in a suspension of CoFe2O4 nanoparticles. in Journal of Applied Physics, 113(23).
https://doi.org/10.1063/1.4811537

Babić-Stojić BS, Jokanović VR, Milivojević D, Jagličić Z, Makovec D, Jović NG, Marinović-Cincović M. Magnetic properties and magnetic relaxation in a suspension of CoFe2O4 nanoparticles. in Journal of Applied Physics. 2013;113(23).
doi:10.1063/1.4811537 .

Babić-Stojić, Branka S., Jokanović, Vukoman R., Milivojević, Dušan, Jagličić, Zvonko, Makovec, Darko, Jović, Nataša G., Marinović-Cincović, Milena, "Magnetic properties and magnetic relaxation in a suspension of CoFe2O4 nanoparticles" in Journal of Applied Physics, 113, no. 23 (2013),
https://doi.org/10.1063/1.4811537 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Milivojević, Dušan
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
AU  - Jović, Nataša G.
AU  - Marinović-Cincović, Milena
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5773
AB  - We present a study of magnetic and structural properties of CoFe2O4 nanoparticles suspended in an organic liquid. Transmission electron microscopy shows that the nanoparticles have a narrow size distribution of average particle size 5.9 +/- 1.0 nm. X-ray diffraction shows that the particles are of cubic spinel crystal structure. Dynamic light scattering measurements reveal the existence of an organic shell around the CoFe2O4 nanoparticles with an average hydrodynamic diameter of 14.4 nm. Coercive magnetic field at T = 5 K is found to be 11.8 kOe. Disappearance of the coercive field and remanent magnetization at about 170 K suggests that the CoFe2O4 nanoparticles are superparamagnetic at higher temperatures which is confirmed by the room temperature Mossbauer spectrum analysis. Saturation magnetization of the nanoparticles of 80.8 emu/g(CoFe2O4) at 5 K reaches the value detected in the bulk material and remains very high also at room temperature. The cobalt ferrite nanoparticle system synthesized in this work exhibits magnetic properties which are very suitable for various biomedical applications.
T2  - Journal of Nanomaterials
T1  - Magnetic and Structural Studies of CoFe2O4 Nanoparticles Suspended in an Organic Liquid
SP  - 741036
DO  - 10.1155/2013/741036
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Milivojević, Dušan and Jagličić, Zvonko and Makovec, Darko and Jović, Nataša G. and Marinović-Cincović, Milena",
year = "2013",
abstract = "We present a study of magnetic and structural properties of CoFe2O4 nanoparticles suspended in an organic liquid. Transmission electron microscopy shows that the nanoparticles have a narrow size distribution of average particle size 5.9 +/- 1.0 nm. X-ray diffraction shows that the particles are of cubic spinel crystal structure. Dynamic light scattering measurements reveal the existence of an organic shell around the CoFe2O4 nanoparticles with an average hydrodynamic diameter of 14.4 nm. Coercive magnetic field at T = 5 K is found to be 11.8 kOe. Disappearance of the coercive field and remanent magnetization at about 170 K suggests that the CoFe2O4 nanoparticles are superparamagnetic at higher temperatures which is confirmed by the room temperature Mossbauer spectrum analysis. Saturation magnetization of the nanoparticles of 80.8 emu/g(CoFe2O4) at 5 K reaches the value detected in the bulk material and remains very high also at room temperature. The cobalt ferrite nanoparticle system synthesized in this work exhibits magnetic properties which are very suitable for various biomedical applications.",
journal = "Journal of Nanomaterials",
title = "Magnetic and Structural Studies of CoFe2O4 Nanoparticles Suspended in an Organic Liquid",
pages = "741036",
doi = "10.1155/2013/741036"
}

Babić-Stojić, B. S., Jokanović, V. R., Milivojević, D., Jagličić, Z., Makovec, D., Jović, N. G.,& Marinović-Cincović, M.. (2013). Magnetic and Structural Studies of CoFe2O4 Nanoparticles Suspended in an Organic Liquid. in Journal of Nanomaterials, 741036.
https://doi.org/10.1155/2013/741036

Babić-Stojić BS, Jokanović VR, Milivojević D, Jagličić Z, Makovec D, Jović NG, Marinović-Cincović M. Magnetic and Structural Studies of CoFe2O4 Nanoparticles Suspended in an Organic Liquid. in Journal of Nanomaterials. 2013;:741036.
doi:10.1155/2013/741036 .

Babić-Stojić, Branka S., Jokanović, Vukoman R., Milivojević, Dušan, Jagličić, Zvonko, Makovec, Darko, Jović, Nataša G., Marinović-Cincović, Milena, "Magnetic and Structural Studies of CoFe2O4 Nanoparticles Suspended in an Organic Liquid" in Journal of Nanomaterials (2013):741036,
https://doi.org/10.1155/2013/741036 . .

TY  - JOUR
AU  - Jokanović, Vukoman R.
AU  - Čolović, Božana M.
AU  - Jović, Nataša G.
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Bojan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5737
AB  - Low-temperature synthesis of fluorapatite/fluorohydroxyapatite with precursor mixture previously mechanochemically treated is described in this article. Ethylene vinylacetate/versatate copolymer as a surface active substance was mechanically treated to obtain a core-shell system with strongly controlled grain size. Despite usual behavior of mechanically activated systems, only an amorphous phase formed from precursor ions present in the mixture composed of -Ca2P2O7, CaCO3, CaF2, and unreacted Ca(OH)(2) was obtained during milling for 5min to 8h. The mixture contained depots of labile F- ions conserved in micelles cages, which are useful for teeth protection from carries. For transformation of these amorphous phases into fluorapatite, an additional low thermal treatment was necessary. The mechanism of the precursor mixture transformation into fluorapatite during milling and thermal treatment was investigated using FTIR spectroscopy and X-ray diffraction. The morphology and size distribution of the obtained powders was studied using SEM and TEM.
T2  - International Journal of Applied Ceramic Technology
T1  - Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite
VL  - 10
IS  - 6
SP  - 957
EP  - 969
DO  - 10.1111/j.1744-7402.2012.02821.x
ER  - 

@article{
author = "Jokanović, Vukoman R. and Čolović, Božana M. and Jović, Nataša G. and Babić-Stojić, Branka S. and Jokanović, Bojan",
year = "2013",
abstract = "Low-temperature synthesis of fluorapatite/fluorohydroxyapatite with precursor mixture previously mechanochemically treated is described in this article. Ethylene vinylacetate/versatate copolymer as a surface active substance was mechanically treated to obtain a core-shell system with strongly controlled grain size. Despite usual behavior of mechanically activated systems, only an amorphous phase formed from precursor ions present in the mixture composed of -Ca2P2O7, CaCO3, CaF2, and unreacted Ca(OH)(2) was obtained during milling for 5min to 8h. The mixture contained depots of labile F- ions conserved in micelles cages, which are useful for teeth protection from carries. For transformation of these amorphous phases into fluorapatite, an additional low thermal treatment was necessary. The mechanism of the precursor mixture transformation into fluorapatite during milling and thermal treatment was investigated using FTIR spectroscopy and X-ray diffraction. The morphology and size distribution of the obtained powders was studied using SEM and TEM.",
journal = "International Journal of Applied Ceramic Technology",
title = "Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite",
volume = "10",
number = "6",
pages = "957-969",
doi = "10.1111/j.1744-7402.2012.02821.x"
}

Jokanović, V. R., Čolović, B. M., Jović, N. G., Babić-Stojić, B. S.,& Jokanović, B.. (2013). Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite. in International Journal of Applied Ceramic Technology, 10(6), 957-969.
https://doi.org/10.1111/j.1744-7402.2012.02821.x

Jokanović VR, Čolović BM, Jović NG, Babić-Stojić BS, Jokanović B. Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite. in International Journal of Applied Ceramic Technology. 2013;10(6):957-969.
doi:10.1111/j.1744-7402.2012.02821.x .

Jokanović, Vukoman R., Čolović, Božana M., Jović, Nataša G., Babić-Stojić, Branka S., Jokanović, Bojan, "Mechanochemical and Low-Temperature Synthesis of Nanocrystalline Fluorohydroxyapatite/Fluorapatite" in International Journal of Applied Ceramic Technology, 10, no. 6 (2013):957-969,
https://doi.org/10.1111/j.1744-7402.2012.02821.x . .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Cvjetićanin, Nikola
AU  - Babić-Stojić, Branka S.
AU  - Makovec, Darko
AU  - Jokanović, Vukoman R.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5499
AB  - alpha-Fe2O3 nanospheres with diameters of 20-40 nm and FeOOH nanorods with diameters of 150-200 nm and lengths of 0.5-1.0 mu m were synthesized via hydrolysis of Fe(NO3)(3) and FeCl3 solutions, respectively, in the presence of urea and oleic acid, under reflux at temperature similar to 90 degrees C for 8 h. The molar ratio of Fe3+ ions and urea were changed until pure phases have been obtained. The key parameter of the synthesis which provides pure hematite and beta-FeOOH phases was the pH. The samples were characterized by X-ray powder diffraction, transmission electron microscopy and Mossbauer spectroscopy. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Synthesis of hematite and iron oxyhydroxide nanocrystals by precipitation of Fe3+ ions inside oleic acid micelles
VL  - 39
IS  - 5
SP  - 5659
EP  - 5665
DO  - 10.1016/j.ceramint.2012.12.082
ER  - 

@article{
author = "Jović, Nataša G. and Cvjetićanin, Nikola and Babić-Stojić, Branka S. and Makovec, Darko and Jokanović, Vukoman R.",
year = "2013",
abstract = "alpha-Fe2O3 nanospheres with diameters of 20-40 nm and FeOOH nanorods with diameters of 150-200 nm and lengths of 0.5-1.0 mu m were synthesized via hydrolysis of Fe(NO3)(3) and FeCl3 solutions, respectively, in the presence of urea and oleic acid, under reflux at temperature similar to 90 degrees C for 8 h. The molar ratio of Fe3+ ions and urea were changed until pure phases have been obtained. The key parameter of the synthesis which provides pure hematite and beta-FeOOH phases was the pH. The samples were characterized by X-ray powder diffraction, transmission electron microscopy and Mossbauer spectroscopy. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Synthesis of hematite and iron oxyhydroxide nanocrystals by precipitation of Fe3+ ions inside oleic acid micelles",
volume = "39",
number = "5",
pages = "5659-5665",
doi = "10.1016/j.ceramint.2012.12.082"
}

Jović, N. G., Cvjetićanin, N., Babić-Stojić, B. S., Makovec, D.,& Jokanović, V. R.. (2013). Synthesis of hematite and iron oxyhydroxide nanocrystals by precipitation of Fe3+ ions inside oleic acid micelles. in Ceramics International, 39(5), 5659-5665.
https://doi.org/10.1016/j.ceramint.2012.12.082

Jović NG, Cvjetićanin N, Babić-Stojić BS, Makovec D, Jokanović VR. Synthesis of hematite and iron oxyhydroxide nanocrystals by precipitation of Fe3+ ions inside oleic acid micelles. in Ceramics International. 2013;39(5):5659-5665.
doi:10.1016/j.ceramint.2012.12.082 .

Jović, Nataša G., Cvjetićanin, Nikola, Babić-Stojić, Branka S., Makovec, Darko, Jokanović, Vukoman R., "Synthesis of hematite and iron oxyhydroxide nanocrystals by precipitation of Fe3+ ions inside oleic acid micelles" in Ceramics International, 39, no. 5 (2013):5659-5665,
https://doi.org/10.1016/j.ceramint.2012.12.082 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Branković, Dušan
AU  - Jović, Nataša G.
AU  - Čupić, Svetlana D.
AU  - Kojić, Dušan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4909
AB  - Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized by a sol-gel technique. Samples with various mass fractions of Co1+yAl2-yO4 in composite x, and with various Co concentrations in spinel y were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent ac susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration x of Co1+yAl2-yO4 in SiO2, showed very similar Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta a parts per thousand -100 K). Other samples, with lower x, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.
T2  - Journal of Sol-gel Science and Technology
T1  - Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method
VL  - 63
IS  - 1
SP  - 56
EP  - 64
DO  - 10.1007/s10971-012-2763-1
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Branković, Dušan and Jović, Nataša G. and Čupić, Svetlana D. and Kojić, Dušan",
year = "2012",
abstract = "Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized by a sol-gel technique. Samples with various mass fractions of Co1+yAl2-yO4 in composite x, and with various Co concentrations in spinel y were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent ac susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration x of Co1+yAl2-yO4 in SiO2, showed very similar Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta a parts per thousand -100 K). Other samples, with lower x, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.",
journal = "Journal of Sol-gel Science and Technology",
title = "Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method",
volume = "63",
number = "1",
pages = "56-64",
doi = "10.1007/s10971-012-2763-1"
}

Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z., Branković, D., Jović, N. G., Čupić, S. D.,& Kojić, D.. (2012). Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method. in Journal of Sol-gel Science and Technology, 63(1), 56-64.
https://doi.org/10.1007/s10971-012-2763-1

Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Branković D, Jović NG, Čupić SD, Kojić D. Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method. in Journal of Sol-gel Science and Technology. 2012;63(1):56-64.
doi:10.1007/s10971-012-2763-1 .

Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Branković, Dušan, Jović, Nataša G., Čupić, Svetlana D., Kojić, Dušan, "Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method" in Journal of Sol-gel Science and Technology, 63, no. 1 (2012):56-64,
https://doi.org/10.1007/s10971-012-2763-1 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Blanuša, Jovan
AU  - Kovač, Janez
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6923
AB  - Room temperature ferromagnetic properties of Zn-Mn-O show evident dependence on manganese concentration and preparation conditions. We systematically studied series of samples with manganese concentration ranging from 0 to 10 at.%, prepared in air at thermal treatment temperatures ranging from 400 to 900 degrees tau C. The samples were investigated by X-ray diffraction, TEM, magnetization measurements and XPS spectroscopy. XPS analyses of surface composition, chemical bonding and XPS depth profiling were successfully employed on powder revealing the chemical composition at the surface of the grains and underneath. The study emphasizes important role of the grain surface in observed room temperature ferromagnetism. It seems that the ferromagnetic phase is correlated with oxygen build up at the surface.
T2  - Acta Physica Polonica A
T1  - Room-Temperature Ferromagnetism in Zn-Mn-O, X-Ray Photoemission Surface Study
VL  - 120
IS  - 2
SP  - 311
EP  - 315
DO  - 10.12693/APhysPolA.120.311
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Blanuša, Jovan and Kovač, Janez",
year = "2011",
abstract = "Room temperature ferromagnetic properties of Zn-Mn-O show evident dependence on manganese concentration and preparation conditions. We systematically studied series of samples with manganese concentration ranging from 0 to 10 at.%, prepared in air at thermal treatment temperatures ranging from 400 to 900 degrees tau C. The samples were investigated by X-ray diffraction, TEM, magnetization measurements and XPS spectroscopy. XPS analyses of surface composition, chemical bonding and XPS depth profiling were successfully employed on powder revealing the chemical composition at the surface of the grains and underneath. The study emphasizes important role of the grain surface in observed room temperature ferromagnetism. It seems that the ferromagnetic phase is correlated with oxygen build up at the surface.",
journal = "Acta Physica Polonica A",
title = "Room-Temperature Ferromagnetism in Zn-Mn-O, X-Ray Photoemission Surface Study",
volume = "120",
number = "2",
pages = "311-315",
doi = "10.12693/APhysPolA.120.311"
}

Milivojević, D., Babić-Stojić, B. S., Blanuša, J.,& Kovač, J.. (2011). Room-Temperature Ferromagnetism in Zn-Mn-O, X-Ray Photoemission Surface Study. in Acta Physica Polonica A, 120(2), 311-315.
https://doi.org/10.12693/APhysPolA.120.311

Milivojević D, Babić-Stojić BS, Blanuša J, Kovač J. Room-Temperature Ferromagnetism in Zn-Mn-O, X-Ray Photoemission Surface Study. in Acta Physica Polonica A. 2011;120(2):311-315.
doi:10.12693/APhysPolA.120.311 .

Milivojević, Dušan, Babić-Stojić, Branka S., Blanuša, Jovan, Kovač, Janez, "Room-Temperature Ferromagnetism in Zn-Mn-O, X-Ray Photoemission Surface Study" in Acta Physica Polonica A, 120, no. 2 (2011):311-315,
https://doi.org/10.12693/APhysPolA.120.311 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6924
AB  - Samples of Mn-doped amorphous SiO2 matrix with manganese concentration 0.7 and 3 at.% have been prepared by a sol-gel method. Transmission electron microscopy analysis has shown that the samples contain agglomerates of amorphous silica particles 10 - 20 nm in size. Two types of Mn-rich particles are dispersed in silica matrix, smaller nanoparticles with dimensions between 3 and 10 nm, and larger crystalline areas consisting of aggregates of the smaller nanoparticles. High-temperature magnetic susceptibility reveals that dominant magnetic phase at higher temperatures is lambda-MnO2. At temperatures below T-C = 43 K strong ferrimagnetism originating from the minor Mn3O4 phase masks the relatively weak magnetism of lambda-MnO2. Magnetic field dependence of the maximum in the zero-field-cooled magnetization for both the samples in the vicinity of 40 K, and a frequency shift of the real component of the AC magnetic susceptibility in the sample with 3 at.% Mn suggest that the magnetic moments of the smaller Mn3O4 nanoparticles with dimensions below 10 nm are subject to thermally activated blocking process just below the Curie temperature T-C. The low-temperature maximum in the zero-field-cooled magnetization observed for both the samples below 10 K indicates possible spin glass freezing of the magnetic moments in the geometrically frustrated Mn sublattice of the lambda-MnO2 crystal structure.
T2  - Acta Physica Polonica A
T1  - Magnetic Properties of Mn-Doped Amorphous SiO2 Matrix
VL  - 120
IS  - 2
SP  - 316
EP  - 321
DO  - 10.12693/APhysPolA.120.316
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Makovec, Darko",
year = "2011",
abstract = "Samples of Mn-doped amorphous SiO2 matrix with manganese concentration 0.7 and 3 at.% have been prepared by a sol-gel method. Transmission electron microscopy analysis has shown that the samples contain agglomerates of amorphous silica particles 10 - 20 nm in size. Two types of Mn-rich particles are dispersed in silica matrix, smaller nanoparticles with dimensions between 3 and 10 nm, and larger crystalline areas consisting of aggregates of the smaller nanoparticles. High-temperature magnetic susceptibility reveals that dominant magnetic phase at higher temperatures is lambda-MnO2. At temperatures below T-C = 43 K strong ferrimagnetism originating from the minor Mn3O4 phase masks the relatively weak magnetism of lambda-MnO2. Magnetic field dependence of the maximum in the zero-field-cooled magnetization for both the samples in the vicinity of 40 K, and a frequency shift of the real component of the AC magnetic susceptibility in the sample with 3 at.% Mn suggest that the magnetic moments of the smaller Mn3O4 nanoparticles with dimensions below 10 nm are subject to thermally activated blocking process just below the Curie temperature T-C. The low-temperature maximum in the zero-field-cooled magnetization observed for both the samples below 10 K indicates possible spin glass freezing of the magnetic moments in the geometrically frustrated Mn sublattice of the lambda-MnO2 crystal structure.",
journal = "Acta Physica Polonica A",
title = "Magnetic Properties of Mn-Doped Amorphous SiO2 Matrix",
volume = "120",
number = "2",
pages = "316-321",
doi = "10.12693/APhysPolA.120.316"
}

Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z.,& Makovec, D.. (2011). Magnetic Properties of Mn-Doped Amorphous SiO2 Matrix. in Acta Physica Polonica A, 120(2), 316-321.
https://doi.org/10.12693/APhysPolA.120.316

Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Makovec D. Magnetic Properties of Mn-Doped Amorphous SiO2 Matrix. in Acta Physica Polonica A. 2011;120(2):316-321.
doi:10.12693/APhysPolA.120.316 .

Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Makovec, Darko, "Magnetic Properties of Mn-Doped Amorphous SiO2 Matrix" in Acta Physica Polonica A, 120, no. 2 (2011):316-321,
https://doi.org/10.12693/APhysPolA.120.316 . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Makovec, Darko
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4177
AB  - Samples of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix with manganese concentration 0.7 and 3 at% have been synthesized by a sol-gel method. Transmission electron microscopy analysis has shown that the samples contain agglomerates of amorphous silica particles 10-20 nm in size. Insilica matrix two types of Mn-rich particles are dispersed, smaller nanoparticles with dimensions between 3 and 10 nm, and larger crystalline areas consisting of aggregates of the smaller nanoparticles. High temperature magnetic susceptibility study reveals that dominant magnetic phase at higher temperatures is lambda-MnO2. At temperatures below T-C = 43 K strong ferrimagnetism originating from the minor Mn3O4 phase masks the relatively weak magnetism of lambda-MnO2 with antiferromagnetic interactions. Magnetic field dependence of the maximum in the zero-field-cooled magnetization for both the samples in the vicinity of 40 K, and a frequency shift of the real component of the ac magnetic susceptibility in the sample with 3 at% Mn suggest that the magnetic moments of the smaller Mn3O4 nanoparticles with dimensions below 10 nm are exposed to thermally activated blocking process just below the Curie temperature T-C. Appearance of a maximum in the zero-field-cooled magnetization for both the samples below 10 K indicates possible spin glass freezing of the magnetic moments at low temperatures which might occur in the geometrically frustrated Mn sublattice of the lambda-MnO2 crystal structure. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic properties of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix
VL  - 323
IS  - 6
SP  - 805
EP  - 812
DO  - 10.1016/j.jmmm.2010.11.002
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Makovec, Darko",
year = "2011",
abstract = "Samples of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix with manganese concentration 0.7 and 3 at% have been synthesized by a sol-gel method. Transmission electron microscopy analysis has shown that the samples contain agglomerates of amorphous silica particles 10-20 nm in size. Insilica matrix two types of Mn-rich particles are dispersed, smaller nanoparticles with dimensions between 3 and 10 nm, and larger crystalline areas consisting of aggregates of the smaller nanoparticles. High temperature magnetic susceptibility study reveals that dominant magnetic phase at higher temperatures is lambda-MnO2. At temperatures below T-C = 43 K strong ferrimagnetism originating from the minor Mn3O4 phase masks the relatively weak magnetism of lambda-MnO2 with antiferromagnetic interactions. Magnetic field dependence of the maximum in the zero-field-cooled magnetization for both the samples in the vicinity of 40 K, and a frequency shift of the real component of the ac magnetic susceptibility in the sample with 3 at% Mn suggest that the magnetic moments of the smaller Mn3O4 nanoparticles with dimensions below 10 nm are exposed to thermally activated blocking process just below the Curie temperature T-C. Appearance of a maximum in the zero-field-cooled magnetization for both the samples below 10 K indicates possible spin glass freezing of the magnetic moments at low temperatures which might occur in the geometrically frustrated Mn sublattice of the lambda-MnO2 crystal structure. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic properties of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix",
volume = "323",
number = "6",
pages = "805-812",
doi = "10.1016/j.jmmm.2010.11.002"
}

Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z.,& Makovec, D.. (2011). Magnetic properties of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix. in Journal of Magnetism and Magnetic Materials, 323(6), 805-812.
https://doi.org/10.1016/j.jmmm.2010.11.002

Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Makovec D. Magnetic properties of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix. in Journal of Magnetism and Magnetic Materials. 2011;323(6):805-812.
doi:10.1016/j.jmmm.2010.11.002 .

Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Makovec, Darko, "Magnetic properties of Mn-oxide nanoparticles dispersed in an amorphous SiO2 matrix" in Journal of Magnetism and Magnetic Materials, 323, no. 6 (2011):805-812,
https://doi.org/10.1016/j.jmmm.2010.11.002 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Marković, Zoran M.
AU  - Kleut, Duška
AU  - Trajković, Vladimir S.
AU  - Babić-Stojić, Branka S.
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4115
AB  - In this paper, the results of the synthesis and characterization of higher fullerene-based colloids is presented. The generation of singlet oxygen (1)O2 ((1)Delta g) by fullerenc water-based colloids (nC60, nC70 and nC84) was investigated. It was found by electron paramagnetic resonance spectroscopy that the generation of singlet oxygen was the highest by the nC84 colloid. The amplitude of the electron paramagnetic resonance (EPR) signal was two orders of magnitude higher than the amplitude of the EPR signals which originated from nC60 and nC70. The surface morphology and the structure of the particles of the water-based colloids were investigated by atomic force microscopy (AFM). The AFM study showed that the average size of the nC60, nC70 and nC84 were 200, 80 and 70 nm, respectively. In addition, the particle size distribution of the nC60, nC70 and nC84 colloids was determined by dynamic light scattering (DLS) measurements.
T2  - Journal of the Serbian Chemical Society
T1  - Singlet oxygen generation by higher fullerene-based colloids
VL  - 75
IS  - 7
SP  - 965
EP  - 973
DO  - 10.2298/JSC090617062J
ER  - 

@article{
author = "Jovanović, Svetlana P. and Marković, Zoran M. and Kleut, Duška and Trajković, Vladimir S. and Babić-Stojić, Branka S. and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2010",
abstract = "In this paper, the results of the synthesis and characterization of higher fullerene-based colloids is presented. The generation of singlet oxygen (1)O2 ((1)Delta g) by fullerenc water-based colloids (nC60, nC70 and nC84) was investigated. It was found by electron paramagnetic resonance spectroscopy that the generation of singlet oxygen was the highest by the nC84 colloid. The amplitude of the electron paramagnetic resonance (EPR) signal was two orders of magnitude higher than the amplitude of the EPR signals which originated from nC60 and nC70. The surface morphology and the structure of the particles of the water-based colloids were investigated by atomic force microscopy (AFM). The AFM study showed that the average size of the nC60, nC70 and nC84 were 200, 80 and 70 nm, respectively. In addition, the particle size distribution of the nC60, nC70 and nC84 colloids was determined by dynamic light scattering (DLS) measurements.",
journal = "Journal of the Serbian Chemical Society",
title = "Singlet oxygen generation by higher fullerene-based colloids",
volume = "75",
number = "7",
pages = "965-973",
doi = "10.2298/JSC090617062J"
}

Jovanović, S. P., Marković, Z. M., Kleut, D., Trajković, V. S., Babić-Stojić, B. S., Dramićanin, M.,& Todorović-Marković, B.. (2010). Singlet oxygen generation by higher fullerene-based colloids. in Journal of the Serbian Chemical Society, 75(7), 965-973.
https://doi.org/10.2298/JSC090617062J

Jovanović SP, Marković ZM, Kleut D, Trajković VS, Babić-Stojić BS, Dramićanin M, Todorović-Marković B. Singlet oxygen generation by higher fullerene-based colloids. in Journal of the Serbian Chemical Society. 2010;75(7):965-973.
doi:10.2298/JSC090617062J .

Jovanović, Svetlana P., Marković, Zoran M., Kleut, Duška, Trajković, Vladimir S., Babić-Stojić, Branka S., Dramićanin, Miroslav, Todorović-Marković, Biljana, "Singlet oxygen generation by higher fullerene-based colloids" in Journal of the Serbian Chemical Society, 75, no. 7 (2010):965-973,
https://doi.org/10.2298/JSC090617062J . .

TY  - JOUR
AU  - Milivojević, Dušan
AU  - Babić-Stojić, Branka S.
AU  - Kovač, Janez
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4111
AB  - The existence of ferromagnetism in Zn-Mn-O semiconductor samples and dependence on the preparation condition were investigated. We systematically examined the samples with manganese concentration ranging from 0 to 10 at.%, prepared by a solid state reaction route using (ZnC(2)O(4)center dot 2H(2)O)(1-x) and (MnC(2)O(4)center dot 2H(2)O)(x) as precursors. Thermal treatment was carried out in air at temperatures ranging from 400 to 900 degrees C. The samples were investigated by X-ray diffraction, transmission electron microscopy, magnetization measurements and XPS spectroscopy. XPS surface composition, chemical analysis and depth profiling were successfully employed on powder revealing the chemical composition at the surface of the grains and underneath. The present investigation suggests that physical properties and observed room temperature ferromagnetism might be due to grain surface effects. It seems that the ferromagnetic phase is correlated with oxygen build up at the surface. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Surface of Zn-Mn-O and its role in room temperature ferromagnetism: An XPS analysis
VL  - 257
IS  - 3
SP  - 937
EP  - 943
DO  - 10.1016/j.apsusc.2010.07.096
ER  - 

@article{
author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Kovač, Janez",
year = "2010",
abstract = "The existence of ferromagnetism in Zn-Mn-O semiconductor samples and dependence on the preparation condition were investigated. We systematically examined the samples with manganese concentration ranging from 0 to 10 at.%, prepared by a solid state reaction route using (ZnC(2)O(4)center dot 2H(2)O)(1-x) and (MnC(2)O(4)center dot 2H(2)O)(x) as precursors. Thermal treatment was carried out in air at temperatures ranging from 400 to 900 degrees C. The samples were investigated by X-ray diffraction, transmission electron microscopy, magnetization measurements and XPS spectroscopy. XPS surface composition, chemical analysis and depth profiling were successfully employed on powder revealing the chemical composition at the surface of the grains and underneath. The present investigation suggests that physical properties and observed room temperature ferromagnetism might be due to grain surface effects. It seems that the ferromagnetic phase is correlated with oxygen build up at the surface. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Surface of Zn-Mn-O and its role in room temperature ferromagnetism: An XPS analysis",
volume = "257",
number = "3",
pages = "937-943",
doi = "10.1016/j.apsusc.2010.07.096"
}

Milivojević, D., Babić-Stojić, B. S.,& Kovač, J.. (2010). Surface of Zn-Mn-O and its role in room temperature ferromagnetism: An XPS analysis. in Applied Surface Science, 257(3), 937-943.
https://doi.org/10.1016/j.apsusc.2010.07.096

Milivojević D, Babić-Stojić BS, Kovač J. Surface of Zn-Mn-O and its role in room temperature ferromagnetism: An XPS analysis. in Applied Surface Science. 2010;257(3):937-943.
doi:10.1016/j.apsusc.2010.07.096 .

Milivojević, Dušan, Babić-Stojić, Branka S., Kovač, Janez, "Surface of Zn-Mn-O and its role in room temperature ferromagnetism: An XPS analysis" in Applied Surface Science, 257, no. 3 (2010):937-943,
https://doi.org/10.1016/j.apsusc.2010.07.096 . .

TY  - JOUR
AU  - Zagorac, Jelena B.
AU  - Bošković, Snežana B.
AU  - Matović, Branko
AU  - Babić-Stojić, Branka S.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4106
AB  - Structure and magnetic features of nanostructured materials with general formula Ca1-xYxMnO3 (x = 0; 0.1; 0.2; 0.3) were investigated. Goldschmidt tolerance factor, G, and global instability index, GII were calculated for Ca1-xYxMnO3 (x = 0, 0.25, 0.5, 0.75, 1) using the software SPuDS (Structure Prediction Diagnostic Software) According to these two parameters possibility of forming perovskite structure type for Ca1-xYxMnO3 solid solution was analysed Substitution of Y3+ for Ca2+ provokes reduction of equivalent amount Mn4+ into Mn3+, the presence of which is a reason for many interesting magnetic, transport and structural features of doped CaMnO3 Crystal structure refinement was carried out using Rietveld analysis Ca1-xYxMnO3 (x = 0; 0.1; 0 2; 0.3) has an orthorombic. Pnma space group that, according to Glazers classification belongs to a(-)b(+) a(-) tilt system. Influence of Y amount on Mn-O bond angles and distances, tilting of MnO6 octahedra around all three axes and octahedra deformation were analysed. Bond valence calculations (B VC) were performed to determine Mn valence state. Using EPR (electron paramagnetic resonance) magnetic measurements were performed and magnetic properties of solid solutions, orthorombicity degree of unit cell, as well as Mn4+/Mn3+ cations ratio in position B were analysed. Microstructure size-strain analysis was performed and these results are in nanometric range which is confirmed by TEM images.
T2  - Science of Sintering
T1  - Structure and Magnetic Investigations of Ca1+xYxMnO3 (x=0, 0.1, 0.2, 0.3) and Mn4+/Mn3+ Relation Aanalysis
VL  - 42
IS  - 2
SP  - 221
EP  - 232
DO  - 10.2298/SOS1002221Z
ER  - 

@article{
author = "Zagorac, Jelena B. and Bošković, Snežana B. and Matović, Branko and Babić-Stojić, Branka S.",
year = "2010",
abstract = "Structure and magnetic features of nanostructured materials with general formula Ca1-xYxMnO3 (x = 0; 0.1; 0.2; 0.3) were investigated. Goldschmidt tolerance factor, G, and global instability index, GII were calculated for Ca1-xYxMnO3 (x = 0, 0.25, 0.5, 0.75, 1) using the software SPuDS (Structure Prediction Diagnostic Software) According to these two parameters possibility of forming perovskite structure type for Ca1-xYxMnO3 solid solution was analysed Substitution of Y3+ for Ca2+ provokes reduction of equivalent amount Mn4+ into Mn3+, the presence of which is a reason for many interesting magnetic, transport and structural features of doped CaMnO3 Crystal structure refinement was carried out using Rietveld analysis Ca1-xYxMnO3 (x = 0; 0.1; 0 2; 0.3) has an orthorombic. Pnma space group that, according to Glazers classification belongs to a(-)b(+) a(-) tilt system. Influence of Y amount on Mn-O bond angles and distances, tilting of MnO6 octahedra around all three axes and octahedra deformation were analysed. Bond valence calculations (B VC) were performed to determine Mn valence state. Using EPR (electron paramagnetic resonance) magnetic measurements were performed and magnetic properties of solid solutions, orthorombicity degree of unit cell, as well as Mn4+/Mn3+ cations ratio in position B were analysed. Microstructure size-strain analysis was performed and these results are in nanometric range which is confirmed by TEM images.",
journal = "Science of Sintering",
title = "Structure and Magnetic Investigations of Ca1+xYxMnO3 (x=0, 0.1, 0.2, 0.3) and Mn4+/Mn3+ Relation Aanalysis",
volume = "42",
number = "2",
pages = "221-232",
doi = "10.2298/SOS1002221Z"
}

Zagorac, J. B., Bošković, S. B., Matović, B.,& Babić-Stojić, B. S.. (2010). Structure and Magnetic Investigations of Ca1+xYxMnO3 (x=0, 0.1, 0.2, 0.3) and Mn4+/Mn3+ Relation Aanalysis. in Science of Sintering, 42(2), 221-232.
https://doi.org/10.2298/SOS1002221Z

Zagorac JB, Bošković SB, Matović B, Babić-Stojić BS. Structure and Magnetic Investigations of Ca1+xYxMnO3 (x=0, 0.1, 0.2, 0.3) and Mn4+/Mn3+ Relation Aanalysis. in Science of Sintering. 2010;42(2):221-232.
doi:10.2298/SOS1002221Z .

Zagorac, Jelena B., Bošković, Snežana B., Matović, Branko, Babić-Stojić, Branka S., "Structure and Magnetic Investigations of Ca1+xYxMnO3 (x=0, 0.1, 0.2, 0.3) and Mn4+/Mn3+ Relation Aanalysis" in Science of Sintering, 42, no. 2 (2010):221-232,
https://doi.org/10.2298/SOS1002221Z . .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Jokanović, Vukoman R.
AU  - Jagličić, Zvonko
AU  - Branković, Dušan
AU  - Milosavljević, Momir
AU  - Makovec, Darko
AU  - Babić-Stojić, Branka S.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4081
AB  - Nanocomposite made of 10 wt% of Co2.4Al0.6O4 particles dispersed in an amorphous SiO2 matrix has been synthesized by a solgel method. X-ray diffraction, transmission electron microscopy and magnetic measurements have been used to characterize the properties of nanocomposite. Most of the particles are well crystallized and have an average diameter below 100 nm. Smaller particles with size below 10 nm have also been observed. A large value of the effective magnetic moment per Co2+ ion of 5.08 mu B and negative and the low CurieWeiss paramagnetic temperature Theta similar to -6 K, obtained from the high-temperature susceptibility data, indicate a possible mixing of Co2+ and Co3+ ions between tetrahedral and octahedral sites of the spinel crystal lattice. The measurements of static and dynamic magnetic susceptibilities have shown that Co2.4Al0.6O4 particles in SiO2 matrix display a spin glass behavior at low temperatures. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic properties of Co2.4Al0.6O4/SiO2 nanocomposite obtained via sol-gel method
VL  - 322
IS  - 21
SP  - 3271
EP  - 3277
DO  - 10.1016/j.jmmm.2010.06.006
ER  - 

@article{
author = "Jović, Nataša G. and Jokanović, Vukoman R. and Jagličić, Zvonko and Branković, Dušan and Milosavljević, Momir and Makovec, Darko and Babić-Stojić, Branka S.",
year = "2010",
abstract = "Nanocomposite made of 10 wt% of Co2.4Al0.6O4 particles dispersed in an amorphous SiO2 matrix has been synthesized by a solgel method. X-ray diffraction, transmission electron microscopy and magnetic measurements have been used to characterize the properties of nanocomposite. Most of the particles are well crystallized and have an average diameter below 100 nm. Smaller particles with size below 10 nm have also been observed. A large value of the effective magnetic moment per Co2+ ion of 5.08 mu B and negative and the low CurieWeiss paramagnetic temperature Theta similar to -6 K, obtained from the high-temperature susceptibility data, indicate a possible mixing of Co2+ and Co3+ ions between tetrahedral and octahedral sites of the spinel crystal lattice. The measurements of static and dynamic magnetic susceptibilities have shown that Co2.4Al0.6O4 particles in SiO2 matrix display a spin glass behavior at low temperatures. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic properties of Co2.4Al0.6O4/SiO2 nanocomposite obtained via sol-gel method",
volume = "322",
number = "21",
pages = "3271-3277",
doi = "10.1016/j.jmmm.2010.06.006"
}

Jović, N. G., Jokanović, V. R., Jagličić, Z., Branković, D., Milosavljević, M., Makovec, D.,& Babić-Stojić, B. S.. (2010). Magnetic properties of Co2.4Al0.6O4/SiO2 nanocomposite obtained via sol-gel method. in Journal of Magnetism and Magnetic Materials, 322(21), 3271-3277.
https://doi.org/10.1016/j.jmmm.2010.06.006

Jović NG, Jokanović VR, Jagličić Z, Branković D, Milosavljević M, Makovec D, Babić-Stojić BS. Magnetic properties of Co2.4Al0.6O4/SiO2 nanocomposite obtained via sol-gel method. in Journal of Magnetism and Magnetic Materials. 2010;322(21):3271-3277.
doi:10.1016/j.jmmm.2010.06.006 .

Jović, Nataša G., Jokanović, Vukoman R., Jagličić, Zvonko, Branković, Dušan, Milosavljević, Momir, Makovec, Darko, Babić-Stojić, Branka S., "Magnetic properties of Co2.4Al0.6O4/SiO2 nanocomposite obtained via sol-gel method" in Journal of Magnetism and Magnetic Materials, 322, no. 21 (2010):3271-3277,
https://doi.org/10.1016/j.jmmm.2010.06.006 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Milivojević, Dušan
AU  - Blanuša, Jovan
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3628
AB  - Polycrystalline Zn-Mn-O samples with nominal manganese concentrations x = 0.0 1, 0.04 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4 center dot)2H(2)O)(1-x) and (MnC(2)O(4)-2H(2)O)(x). Thermal treatment of the samples was performed in air at temperatures 673, 773, 873, 973 and 1173 K for x = 0.01 and at the temperature 773 K for x = 0.04 and 0.10. The samples were investigated by X-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. X-Ray diffraction was also performed on MnO(2) thermally treated at temperatures 673, 773, 873, 973, 1073 and 1173 K. Room temperature ferromagnetism was observed in the Zn-Mn-O samples with x = 0.0 1 thermally treated at low temperatures (673 and 773 K) and in the sample with x = 0.04 thermally treated at 773 K. It seems that the ferromagnetic phase could originate from interactions between Mn(2+) and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.
T2  - Journal of the Serbian Chemical Society
T1  - Ferromagnetic behaviour of the Zn-Mn-O system
VL  - 74
IS  - 1
SP  - 71
EP  - 84
DO  - 10.2298/JSC0901071B
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Milivojević, Dušan and Blanuša, Jovan",
year = "2009",
abstract = "Polycrystalline Zn-Mn-O samples with nominal manganese concentrations x = 0.0 1, 0.04 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4 center dot)2H(2)O)(1-x) and (MnC(2)O(4)-2H(2)O)(x). Thermal treatment of the samples was performed in air at temperatures 673, 773, 873, 973 and 1173 K for x = 0.01 and at the temperature 773 K for x = 0.04 and 0.10. The samples were investigated by X-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. X-Ray diffraction was also performed on MnO(2) thermally treated at temperatures 673, 773, 873, 973, 1073 and 1173 K. Room temperature ferromagnetism was observed in the Zn-Mn-O samples with x = 0.0 1 thermally treated at low temperatures (673 and 773 K) and in the sample with x = 0.04 thermally treated at 773 K. It seems that the ferromagnetic phase could originate from interactions between Mn(2+) and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.",
journal = "Journal of the Serbian Chemical Society",
title = "Ferromagnetic behaviour of the Zn-Mn-O system",
volume = "74",
number = "1",
pages = "71-84",
doi = "10.2298/JSC0901071B"
}

Babić-Stojić, B. S., Milivojević, D.,& Blanuša, J.. (2009). Ferromagnetic behaviour of the Zn-Mn-O system. in Journal of the Serbian Chemical Society, 74(1), 71-84.
https://doi.org/10.2298/JSC0901071B

Babić-Stojić BS, Milivojević D, Blanuša J. Ferromagnetic behaviour of the Zn-Mn-O system. in Journal of the Serbian Chemical Society. 2009;74(1):71-84.
doi:10.2298/JSC0901071B .

Babić-Stojić, Branka S., Milivojević, Dušan, Blanuša, Jovan, "Ferromagnetic behaviour of the Zn-Mn-O system" in Journal of the Serbian Chemical Society, 74, no. 1 (2009):71-84,
https://doi.org/10.2298/JSC0901071B . .

TY  - JOUR
AU  - Brankovic, D.
AU  - Jokanović, Vukoman R.
AU  - Babić-Stojić, Branka S.
AU  - Jagličić, Zvonko
AU  - Lisjak, Darja
AU  - Kojić, Dušan
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3635
AB  - An inhomogeneous system of aggregates of Co3O4 nanocrystallites dispersed in an amorphous SiO2 matrix has been studied. X-ray diffraction and atomic force microscopy reveal a bimodal distribution of crystallite sizes, smaller nanocrystallites with dimension below 10 nm and larger nanocrystallites of about 20 nm. The Co3O4 nanocrystallites enter the composition of nanograins with dimension 20-60 nm. The nanograins build aggregates with dimension 200-500 nm. A large value of the effective magnetic moment per Co2+ ion obtained from the high-temperature susceptibility measurements indicates possible disturbance of the normal spinel structure in which a fraction of Co3+ ions also possesses magnetic moment. An analysis based on the temperature dependence of the coercive field has shown that the smaller nanocrystallites behave as superparamagnetic particles with a blocking temperature of about 10 K. Simultaneous existence of two relaxation processes is observed in the frequency dependence of the imaginary part of the ac magnetic susceptibility in the vicinity of T = 15.8 K. The temperature dependence of the width of the distribution function of relaxation times obtained from the Cole-Cole diagrams exhibits behaviour characteristic for spin glass dynamics in a temperature range above 17.6 K and is temperature independent below 15.8 K, which is a property of superparamagnetic particles. The variation of the width of the distribution function between 17.6 and 15.8 K indicates that interference of the superparamagnetic and spin glass dynamics occurs. It has been found that average relaxation time increases with decreasing temperature from tau(c) LT 10(-4) s at 17.6 K to 1.5 x 10(-1) s at 15 K. The increase of the average relaxation time with decreasing temperature, the observed blocking temperature of the superparamagnetic moments at about 10 K and interference appearing between the two spin dynamics suggest that the magnetic moments in the smaller as well as in the larger nanocrystallites are subject to a thermally activated blocking process at low temperatures.
T2  - Journal of Physics: Condensed Matter
T1  - Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites
VL  - 21
IS  - 9
DO  - 10.1088/0953-8984/21/9/095303
ER  - 

@article{
author = "Brankovic, D. and Jokanović, Vukoman R. and Babić-Stojić, Branka S. and Jagličić, Zvonko and Lisjak, Darja and Kojić, Dušan",
year = "2009",
abstract = "An inhomogeneous system of aggregates of Co3O4 nanocrystallites dispersed in an amorphous SiO2 matrix has been studied. X-ray diffraction and atomic force microscopy reveal a bimodal distribution of crystallite sizes, smaller nanocrystallites with dimension below 10 nm and larger nanocrystallites of about 20 nm. The Co3O4 nanocrystallites enter the composition of nanograins with dimension 20-60 nm. The nanograins build aggregates with dimension 200-500 nm. A large value of the effective magnetic moment per Co2+ ion obtained from the high-temperature susceptibility measurements indicates possible disturbance of the normal spinel structure in which a fraction of Co3+ ions also possesses magnetic moment. An analysis based on the temperature dependence of the coercive field has shown that the smaller nanocrystallites behave as superparamagnetic particles with a blocking temperature of about 10 K. Simultaneous existence of two relaxation processes is observed in the frequency dependence of the imaginary part of the ac magnetic susceptibility in the vicinity of T = 15.8 K. The temperature dependence of the width of the distribution function of relaxation times obtained from the Cole-Cole diagrams exhibits behaviour characteristic for spin glass dynamics in a temperature range above 17.6 K and is temperature independent below 15.8 K, which is a property of superparamagnetic particles. The variation of the width of the distribution function between 17.6 and 15.8 K indicates that interference of the superparamagnetic and spin glass dynamics occurs. It has been found that average relaxation time increases with decreasing temperature from tau(c) LT 10(-4) s at 17.6 K to 1.5 x 10(-1) s at 15 K. The increase of the average relaxation time with decreasing temperature, the observed blocking temperature of the superparamagnetic moments at about 10 K and interference appearing between the two spin dynamics suggest that the magnetic moments in the smaller as well as in the larger nanocrystallites are subject to a thermally activated blocking process at low temperatures.",
journal = "Journal of Physics: Condensed Matter",
title = "Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites",
volume = "21",
number = "9",
doi = "10.1088/0953-8984/21/9/095303"
}

Brankovic, D., Jokanović, V. R., Babić-Stojić, B. S., Jagličić, Z., Lisjak, D.,& Kojić, D.. (2009). Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites. in Journal of Physics: Condensed Matter, 21(9).
https://doi.org/10.1088/0953-8984/21/9/095303

Brankovic D, Jokanović VR, Babić-Stojić BS, Jagličić Z, Lisjak D, Kojić D. Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites. in Journal of Physics: Condensed Matter. 2009;21(9).
doi:10.1088/0953-8984/21/9/095303 .

Brankovic, D., Jokanović, Vukoman R., Babić-Stojić, Branka S., Jagličić, Zvonko, Lisjak, Darja, Kojić, Dušan, "Interference effect between superparamagnetic and spin glass correlated moments in a system of dispersed Co3O4 nanocrystallites" in Journal of Physics: Condensed Matter, 21, no. 9 (2009),
https://doi.org/10.1088/0953-8984/21/9/095303 . .

TY  - JOUR
AU  - Babić-Stojić, Branka S.
AU  - Milivojević, Dušan
AU  - Blanuša, Jovan
AU  - Spasojević, Vojislav
AU  - Bibić, Nataša M.
AU  - Simonović, Branislav R.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3455
AB  - Polycrystalline Zn -Mn -O samples with nominal manganese concentration x = 0.01 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4) center dot 2H(2)O)(1-x) and (MnC(2)O(4) center dot 2H(2)O)(x). Thermal treatment of the samples was carried out in air at temperatures of 673, 773 and 1173 K. The samples were investigated by x-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. Room temperature ferromagnetism is observed in Zn -Mn -O samples with x = 0.01 thermally treated at low temperatures (673, 773 K). It seems that the ferromagnetic phase could originate from interactions between Mn(2+) ions and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.
T2  - Journal of Physics: Condensed Matter
T1  - Ferromagnetic properties of the Zn-Mn-Osystem
VL  - 20
IS  - 23
DO  - 10.1088/0953-8984/20/23/235217
ER  - 

@article{
author = "Babić-Stojić, Branka S. and Milivojević, Dušan and Blanuša, Jovan and Spasojević, Vojislav and Bibić, Nataša M. and Simonović, Branislav R.",
year = "2008",
abstract = "Polycrystalline Zn -Mn -O samples with nominal manganese concentration x = 0.01 and 0.10 were synthesized by a solid state reaction route using (ZnC(2)O(4) center dot 2H(2)O)(1-x) and (MnC(2)O(4) center dot 2H(2)O)(x). Thermal treatment of the samples was carried out in air at temperatures of 673, 773 and 1173 K. The samples were investigated by x-ray diffraction, thermogravimetry, differential thermal analysis, transmission electron microscopy, magnetization measurements and electron paramagnetic resonance. Room temperature ferromagnetism is observed in Zn -Mn -O samples with x = 0.01 thermally treated at low temperatures (673, 773 K). It seems that the ferromagnetic phase could originate from interactions between Mn(2+) ions and acceptor defects incorporated in the ZnO crystal lattice during the thermal treatment of the samples.",
journal = "Journal of Physics: Condensed Matter",
title = "Ferromagnetic properties of the Zn-Mn-Osystem",
volume = "20",
number = "23",
doi = "10.1088/0953-8984/20/23/235217"
}

Babić-Stojić, B. S., Milivojević, D., Blanuša, J., Spasojević, V., Bibić, N. M.,& Simonović, B. R.. (2008). Ferromagnetic properties of the Zn-Mn-Osystem. in Journal of Physics: Condensed Matter, 20(23).
https://doi.org/10.1088/0953-8984/20/23/235217

Babić-Stojić BS, Milivojević D, Blanuša J, Spasojević V, Bibić NM, Simonović BR. Ferromagnetic properties of the Zn-Mn-Osystem. in Journal of Physics: Condensed Matter. 2008;20(23).
doi:10.1088/0953-8984/20/23/235217 .

Babić-Stojić, Branka S., Milivojević, Dušan, Blanuša, Jovan, Spasojević, Vojislav, Bibić, Nataša M., Simonović, Branislav R., "Ferromagnetic properties of the Zn-Mn-Osystem" in Journal of Physics: Condensed Matter, 20, no. 23 (2008),
https://doi.org/10.1088/0953-8984/20/23/235217 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Todorović-Marković, Biljana
AU  - Kleut, Duška
AU  - Nikolić, Nadežda S.
AU  - Vranješ-Đurić, Sanja
AU  - Misirkić, Maja
AU  - Vucicevic, Ljubica
AU  - Janjetović, Kristina D.
AU  - Isaković, Aleksandra J.
AU  - Harhaji, Ljubica M.
AU  - Babić-Stojić, Branka S.
AU  - Dramićanin, Miroslav
AU  - Trajković, Vladimir S.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3322
AB  - Because of the ability to induce cell death in certain conditions, the fullerenes (C-60) are potential anticancer and toxic agents. The colloidal suspension of crystalline C-60 (nano-C-60, nC(60)) is extremely toxic, but the mechanisms of its cytotoxicity are not completely understood. By combining experimental analysis and mathematical modelling, we investigate the requirements for the reactive oxygen species (ROS)-mediated cytotoxicity of different nC(60) suspensions, prepared by solvent exchange method in tetrahydrofuran (THF/nC(60)) and ethanol (EtOH/nC(60)), or by extended mixing in water (aqu/nC(60)). With regard to their capacity to generate ROS and cause mitochondrial depolarization followed by necrotic cell death, the nC(60) suspensions are ranked in the following order: THF/nC(60) GT EtOH/nC(60) GT aqu/nC(60). Mathematical modelling of singlet oxygen (O-1(2)) generation indicates that the O-1(2)-quenching power (THF/nC(60) LT EtOH/nC(60) LT aqU/nC(60)) of the solvent intercalated in the fullerene crystals determines their ability to produce ROS and cause cell damage. These data could. have important implications for toxicology and biomedical application of colloidal fullerenes. (C) 2007 Elsevier Ltd. All rights reserved.
T2  - Biomaterials
T1  - The mechanism of cell-damaging reactive oxygen generation by colloidal fullerenes
VL  - 28
IS  - 36
SP  - 5437
EP  - 5448
DO  - 10.1016/j.biomaterials.2007.09.002
ER  - 

@article{
author = "Marković, Zoran M. and Todorović-Marković, Biljana and Kleut, Duška and Nikolić, Nadežda S. and Vranješ-Đurić, Sanja and Misirkić, Maja and Vucicevic, Ljubica and Janjetović, Kristina D. and Isaković, Aleksandra J. and Harhaji, Ljubica M. and Babić-Stojić, Branka S. and Dramićanin, Miroslav and Trajković, Vladimir S.",
year = "2007",
abstract = "Because of the ability to induce cell death in certain conditions, the fullerenes (C-60) are potential anticancer and toxic agents. The colloidal suspension of crystalline C-60 (nano-C-60, nC(60)) is extremely toxic, but the mechanisms of its cytotoxicity are not completely understood. By combining experimental analysis and mathematical modelling, we investigate the requirements for the reactive oxygen species (ROS)-mediated cytotoxicity of different nC(60) suspensions, prepared by solvent exchange method in tetrahydrofuran (THF/nC(60)) and ethanol (EtOH/nC(60)), or by extended mixing in water (aqu/nC(60)). With regard to their capacity to generate ROS and cause mitochondrial depolarization followed by necrotic cell death, the nC(60) suspensions are ranked in the following order: THF/nC(60) GT EtOH/nC(60) GT aqu/nC(60). Mathematical modelling of singlet oxygen (O-1(2)) generation indicates that the O-1(2)-quenching power (THF/nC(60) LT EtOH/nC(60) LT aqU/nC(60)) of the solvent intercalated in the fullerene crystals determines their ability to produce ROS and cause cell damage. These data could. have important implications for toxicology and biomedical application of colloidal fullerenes. (C) 2007 Elsevier Ltd. All rights reserved.",
journal = "Biomaterials",
title = "The mechanism of cell-damaging reactive oxygen generation by colloidal fullerenes",
volume = "28",
number = "36",
pages = "5437-5448",
doi = "10.1016/j.biomaterials.2007.09.002"
}

Marković, Z. M., Todorović-Marković, B., Kleut, D., Nikolić, N. S., Vranješ-Đurić, S., Misirkić, M., Vucicevic, L., Janjetović, K. D., Isaković, A. J., Harhaji, L. M., Babić-Stojić, B. S., Dramićanin, M.,& Trajković, V. S.. (2007). The mechanism of cell-damaging reactive oxygen generation by colloidal fullerenes. in Biomaterials, 28(36), 5437-5448.
https://doi.org/10.1016/j.biomaterials.2007.09.002

Marković ZM, Todorović-Marković B, Kleut D, Nikolić NS, Vranješ-Đurić S, Misirkić M, Vucicevic L, Janjetović KD, Isaković AJ, Harhaji LM, Babić-Stojić BS, Dramićanin M, Trajković VS. The mechanism of cell-damaging reactive oxygen generation by colloidal fullerenes. in Biomaterials. 2007;28(36):5437-5448.
doi:10.1016/j.biomaterials.2007.09.002 .

Marković, Zoran M., Todorović-Marković, Biljana, Kleut, Duška, Nikolić, Nadežda S., Vranješ-Đurić, Sanja, Misirkić, Maja, Vucicevic, Ljubica, Janjetović, Kristina D., Isaković, Aleksandra J., Harhaji, Ljubica M., Babić-Stojić, Branka S., Dramićanin, Miroslav, Trajković, Vladimir S., "The mechanism of cell-damaging reactive oxygen generation by colloidal fullerenes" in Biomaterials, 28, no. 36 (2007):5437-5448,
https://doi.org/10.1016/j.biomaterials.2007.09.002 . .

TY  - CONF
AU  - Milivojević, Dušan
AU  - Blanuša, Jovan
AU  - Spasojević, Vojislav
AU  - Kusigerski, Vladan
AU  - Babić-Stojić, Branka S.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6678
AB  - Zn-Mn-O semiconductor crystallites with nominal manganese concentration x = 0.01, 0.02, 0.04 and 0.10 were synthesized by a solid state reaction route using oxalate precursors. Thermal treatment procedure was carried out in air at different temperatures in the range 400 - 900 degrees C. The samples were investigated by X-ray diffraction, magnetization measurements and electron paramagnetic resonance. X-ray analysis reveals that dominant crystal phase in the Zn-Mn-O system corresponds to the wurtzite structure of ZnO. Room temperature ferromagnetism, is observed in the Zn-Mn-O samples with lower manganese concentration, x LT = 0.04, thermally treated at low temperature (500 degrees C). Saturation magnetization in the sample with x = 0.01 is found to be 0.05 mu(B)/Mn. The ferromagnetic phase seems to be developed by Zn diffusion into Mn-oxide grains.
C3  - Materials Science Forum
T1  - Structural and magnetic properties of the Zn-Mn-O system
VL  - 555
SP  - 95
EP  - +
DO  - 10.4028/www.scientific.net/MSF.555.95
ER  - 

@conference{
author = "Milivojević, Dušan and Blanuša, Jovan and Spasojević, Vojislav and Kusigerski, Vladan and Babić-Stojić, Branka S.",
year = "2007",
abstract = "Zn-Mn-O semiconductor crystallites with nominal manganese concentration x = 0.01, 0.02, 0.04 and 0.10 were synthesized by a solid state reaction route using oxalate precursors. Thermal treatment procedure was carried out in air at different temperatures in the range 400 - 900 degrees C. The samples were investigated by X-ray diffraction, magnetization measurements and electron paramagnetic resonance. X-ray analysis reveals that dominant crystal phase in the Zn-Mn-O system corresponds to the wurtzite structure of ZnO. Room temperature ferromagnetism, is observed in the Zn-Mn-O samples with lower manganese concentration, x LT = 0.04, thermally treated at low temperature (500 degrees C). Saturation magnetization in the sample with x = 0.01 is found to be 0.05 mu(B)/Mn. The ferromagnetic phase seems to be developed by Zn diffusion into Mn-oxide grains.",
journal = "Materials Science Forum",
title = "Structural and magnetic properties of the Zn-Mn-O system",
volume = "555",
pages = "95-+",
doi = "10.4028/www.scientific.net/MSF.555.95"
}

Milivojević, D., Blanuša, J., Spasojević, V., Kusigerski, V.,& Babić-Stojić, B. S.. (2007). Structural and magnetic properties of the Zn-Mn-O system. in Materials Science Forum, 555, 95-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.95

Milivojević D, Blanuša J, Spasojević V, Kusigerski V, Babić-Stojić BS. Structural and magnetic properties of the Zn-Mn-O system. in Materials Science Forum. 2007;555:95-+.
doi:10.4028/www.scientific.net/MSF.555.95 .

Milivojević, Dušan, Blanuša, Jovan, Spasojević, Vojislav, Kusigerski, Vladan, Babić-Stojić, Branka S., "Structural and magnetic properties of the Zn-Mn-O system" in Materials Science Forum, 555 (2007):95-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.95 . .