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  - Bošković, Marko
AU  - Goya, Gerardo F.
AU  - Vranješ-Đurić, Sanja
AU  - Jović, Nataša G.
AU  - Jančar, Boštjan
AU  - Antić, Bratislav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/461
AB  - Herein we present the results of specific loss power (SLP) analysis of polydisperse water based ferrofluids, Fe3O4/PEG200 and Fe3O4/PEG6000, with average Fe3O4 particle size of 9 nm and 11 nm, respectively. Specific loss power was measured in alternating magnetic field of various amplitudes and at fixed frequency of 580.5 kHz. Maximum SLP values acquired were 195 W/g for Fe3O4/PEG200 and 60 W/g for Fe3O4/PEG6000 samples. The samples were labeled as superparamagnetic by magnetization measurements, but SLP field dependence showed deviation from the behavior predicted by the commonly employed linear response theory. The scope of this theory for both samples with wide particle size distribution is discussed. Deviation from the expected behavior is explained by referring to polydisperse nature of the samples and field dependent relaxation rates. (C) 2015 AIP Publishing LLC.
T2  - Journal of Applied Physics
T1  - Influence of size distribution and field amplitude on specific loss power
VL  - 117
IS  - 10
DO  - 10.1063/1.4914074
ER  - 

@article{
author = "Bošković, Marko and Goya, Gerardo F. and Vranješ-Đurić, Sanja and Jović, Nataša G. and Jančar, Boštjan and Antić, Bratislav",
year = "2015",
abstract = "Herein we present the results of specific loss power (SLP) analysis of polydisperse water based ferrofluids, Fe3O4/PEG200 and Fe3O4/PEG6000, with average Fe3O4 particle size of 9 nm and 11 nm, respectively. Specific loss power was measured in alternating magnetic field of various amplitudes and at fixed frequency of 580.5 kHz. Maximum SLP values acquired were 195 W/g for Fe3O4/PEG200 and 60 W/g for Fe3O4/PEG6000 samples. The samples were labeled as superparamagnetic by magnetization measurements, but SLP field dependence showed deviation from the behavior predicted by the commonly employed linear response theory. The scope of this theory for both samples with wide particle size distribution is discussed. Deviation from the expected behavior is explained by referring to polydisperse nature of the samples and field dependent relaxation rates. (C) 2015 AIP Publishing LLC.",
journal = "Journal of Applied Physics",
title = "Influence of size distribution and field amplitude on specific loss power",
volume = "117",
number = "10",
doi = "10.1063/1.4914074"
}

Bošković, M., Goya, G. F., Vranješ-Đurić, S., Jović, N. G., Jančar, B.,& Antić, B.. (2015). Influence of size distribution and field amplitude on specific loss power. in Journal of Applied Physics, 117(10).
https://doi.org/10.1063/1.4914074

Bošković M, Goya GF, Vranješ-Đurić S, Jović NG, Jančar B, Antić B. Influence of size distribution and field amplitude on specific loss power. in Journal of Applied Physics. 2015;117(10).
doi:10.1063/1.4914074 .

Bošković, Marko, Goya, Gerardo F., Vranješ-Đurić, Sanja, Jović, Nataša G., Jančar, Boštjan, Antić, Bratislav, "Influence of size distribution and field amplitude on specific loss power" in Journal of Applied Physics, 117, no. 10 (2015),
https://doi.org/10.1063/1.4914074 . .

TY  - JOUR
AU  - Radović, Magdalena
AU  - Calatayud, Maria Pilar
AU  - Goya, Gerardo F.
AU  - Ricardo Ibarra, Manuel
AU  - Antić, Bratislav
AU  - Spasojević, Vojislav
AU  - Nikolić, Nadežda S.
AU  - Janković, Drina
AU  - Mirković, Marija D.
AU  - Vranješ-Đurić, Sanja
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/234
AB  - Two different types of magnetic nanoparticles (MNPs) were synthesized in order to compare their efficiency as radioactive vectors, Fe3O4-Naked (80 +/- 5 nm) and polyethylene glycol 600 diacid functionalized Fe3O4 (Fe3O4-PEG600) MNPs (46 +/- 0.6 nm). They were characterized based on the external morphology, size distribution, and colloidal and magnetic properties. The obtained specific power absorption value for Fe3O4-PEG600 MNPs was 200 W/g, indicated their potential in hyperthermia based cancer treatments. The labeling yield, in vitro stability and in vivo biodistribution profile of Y-90-MNPs were compared. Both types of MNPs were Y-90-labeled in reproducible high yield ( GT 97%). The stability of the obtained radioactive nanoparticles was evaluated in saline and human serum media in order to optimize the formulations for in vivo use. The biodistribution in Wistar rats showed different pharmacokinetic behaviors of nanoparticles: a large fraction of both injected MNPs ended in the liver (14.58%ID/g for Y-90-Fe3O4-Naked MNPs and 19.61%ID/g for Y-90-Fe3O4-PEG600 MNPs) whereas minor fractions attained in other organs. The main difference between the two types of MNPs was the higher accumulation of Y-90-Fe3O4-Naked MNPs in the lungs (12.14%ID/g vs. 2.00%ID/g for Y-90-Fe3O4-PEG600 MNPs) due to their in vivo agglomeration. The studied radiolabeled magnetic complexes such as Y-90-Fe3O4-PEG600 MNPs constitute a great promise for multiple diagnostic-therapeutic uses combining, for example, MRI-magnetic hyperthermia and regional radiotherapy. (c) 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 103A: 126-134, 2015.
T2  - Journal of Biomedical Materials Research. Part A
T1  - Preparation and in vivo evaluation of multifunctional Y-90-labeled magnetic nanoparticles designed for cancer therapy
VL  - 103
IS  - 1
SP  - 126
EP  - 134
DO  - 10.1002/jbm.a.35160
ER  - 

@article{
author = "Radović, Magdalena and Calatayud, Maria Pilar and Goya, Gerardo F. and Ricardo Ibarra, Manuel and Antić, Bratislav and Spasojević, Vojislav and Nikolić, Nadežda S. and Janković, Drina and Mirković, Marija D. and Vranješ-Đurić, Sanja",
year = "2015",
abstract = "Two different types of magnetic nanoparticles (MNPs) were synthesized in order to compare their efficiency as radioactive vectors, Fe3O4-Naked (80 +/- 5 nm) and polyethylene glycol 600 diacid functionalized Fe3O4 (Fe3O4-PEG600) MNPs (46 +/- 0.6 nm). They were characterized based on the external morphology, size distribution, and colloidal and magnetic properties. The obtained specific power absorption value for Fe3O4-PEG600 MNPs was 200 W/g, indicated their potential in hyperthermia based cancer treatments. The labeling yield, in vitro stability and in vivo biodistribution profile of Y-90-MNPs were compared. Both types of MNPs were Y-90-labeled in reproducible high yield ( GT 97%). The stability of the obtained radioactive nanoparticles was evaluated in saline and human serum media in order to optimize the formulations for in vivo use. The biodistribution in Wistar rats showed different pharmacokinetic behaviors of nanoparticles: a large fraction of both injected MNPs ended in the liver (14.58%ID/g for Y-90-Fe3O4-Naked MNPs and 19.61%ID/g for Y-90-Fe3O4-PEG600 MNPs) whereas minor fractions attained in other organs. The main difference between the two types of MNPs was the higher accumulation of Y-90-Fe3O4-Naked MNPs in the lungs (12.14%ID/g vs. 2.00%ID/g for Y-90-Fe3O4-PEG600 MNPs) due to their in vivo agglomeration. The studied radiolabeled magnetic complexes such as Y-90-Fe3O4-PEG600 MNPs constitute a great promise for multiple diagnostic-therapeutic uses combining, for example, MRI-magnetic hyperthermia and regional radiotherapy. (c) 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 103A: 126-134, 2015.",
journal = "Journal of Biomedical Materials Research. Part A",
title = "Preparation and in vivo evaluation of multifunctional Y-90-labeled magnetic nanoparticles designed for cancer therapy",
volume = "103",
number = "1",
pages = "126-134",
doi = "10.1002/jbm.a.35160"
}

Radović, M., Calatayud, M. P., Goya, G. F., Ricardo Ibarra, M., Antić, B., Spasojević, V., Nikolić, N. S., Janković, D., Mirković, M. D.,& Vranješ-Đurić, S.. (2015). Preparation and in vivo evaluation of multifunctional Y-90-labeled magnetic nanoparticles designed for cancer therapy. in Journal of Biomedical Materials Research. Part A, 103(1), 126-134.
https://doi.org/10.1002/jbm.a.35160

Radović M, Calatayud MP, Goya GF, Ricardo Ibarra M, Antić B, Spasojević V, Nikolić NS, Janković D, Mirković MD, Vranješ-Đurić S. Preparation and in vivo evaluation of multifunctional Y-90-labeled magnetic nanoparticles designed for cancer therapy. in Journal of Biomedical Materials Research. Part A. 2015;103(1):126-134.
doi:10.1002/jbm.a.35160 .

Radović, Magdalena, Calatayud, Maria Pilar, Goya, Gerardo F., Ricardo Ibarra, Manuel, Antić, Bratislav, Spasojević, Vojislav, Nikolić, Nadežda S., Janković, Drina, Mirković, Marija D., Vranješ-Đurić, Sanja, "Preparation and in vivo evaluation of multifunctional Y-90-labeled magnetic nanoparticles designed for cancer therapy" in Journal of Biomedical Materials Research. Part A, 103, no. 1 (2015):126-134,
https://doi.org/10.1002/jbm.a.35160 . .

TY  - CONF
AU  - Radović, Magdalena
AU  - Calatayud, P.
AU  - Janković, Drina
AU  - Antić, Bratislav
AU  - Spasojević, Vojislav
AU  - Goya, Gerardo F.
AU  - Vranješ-Đurić, Sanja
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9228
AB  - The aim of this study is investigation of the potential of two novel types of
multifunctional 90Y-labelled magnetic nanoparticles (MNPs): Fe3O4-Naked
and polyethylene glycol 600 diacid functionalized Fe3O4 (Fe3O4-PEGdiacid)
MNPs as targeting vehicles to localize both radioactivity and magnetic
energy at the tumor site.
The conditions for their synthesis and radiolabelling were optimized. MNPs
were characterized based on the external morphology, size distribution and
magnetic properties. These results were compared to assess the effect of the
coating on the physicochemical characteristics of the particles. 90Y-labelling
of both Fe3O4-Naked and Fe3O4-PEGdiacid MNPs enabled the studies of
biodistribution and biodegradation of magnetite particles in vivo.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Preparation and characterization of 90 Y-labelled magnetic nanoparticles
VL  - G-03-P
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9228
ER  - 

@conference{
author = "Radović, Magdalena and Calatayud, P. and Janković, Drina and Antić, Bratislav and Spasojević, Vojislav and Goya, Gerardo F. and Vranješ-Đurić, Sanja",
year = "2014",
abstract = "The aim of this study is investigation of the potential of two novel types of
multifunctional 90Y-labelled magnetic nanoparticles (MNPs): Fe3O4-Naked
and polyethylene glycol 600 diacid functionalized Fe3O4 (Fe3O4-PEGdiacid)
MNPs as targeting vehicles to localize both radioactivity and magnetic
energy at the tumor site.
The conditions for their synthesis and radiolabelling were optimized. MNPs
were characterized based on the external morphology, size distribution and
magnetic properties. These results were compared to assess the effect of the
coating on the physicochemical characteristics of the particles. 90Y-labelling
of both Fe3O4-Naked and Fe3O4-PEGdiacid MNPs enabled the studies of
biodistribution and biodegradation of magnetite particles in vivo.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Preparation and characterization of 90 Y-labelled magnetic nanoparticles",
volume = "G-03-P",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9228"
}

Radović, M., Calatayud, P., Janković, D., Antić, B., Spasojević, V., Goya, G. F.,& Vranješ-Đurić, S.. (2014). Preparation and characterization of 90 Y-labelled magnetic nanoparticles. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., G-03-P.
https://hdl.handle.net/21.15107/rcub_vinar_9228

Radović M, Calatayud P, Janković D, Antić B, Spasojević V, Goya GF, Vranješ-Đurić S. Preparation and characterization of 90 Y-labelled magnetic nanoparticles. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2014;G-03-P.
https://hdl.handle.net/21.15107/rcub_vinar_9228 .

Radović, Magdalena, Calatayud, P., Janković, Drina, Antić, Bratislav, Spasojević, Vojislav, Goya, Gerardo F., Vranješ-Đurić, Sanja, "Preparation and characterization of 90 Y-labelled magnetic nanoparticles" in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry, G-03-P (2014),
https://hdl.handle.net/21.15107/rcub_vinar_9228 .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Calatayud, Maria Pilar
AU  - Sanz, Beatriz
AU  - Montone, Amelia
AU  - Goya, Gerardo F.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/137
AB  - Hybrid structures composed of exfoliated expanded graphite (EG) and iron oxide nanocrystals were produced by an ex situ process. The iron oxide nanoparticles coated with meso-2,3-dimercaptosuccinic acid (DMSA), or poly(acrylic acid) (PAA) were integrated onto the exfoliated EG flakes by mixing their aqueous suspensions at room temperature under the support of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinnimide (NHS). EG flakes both naked and functionalized with branched polyethylenimine (PEI) were employed. Complete integration of the two constituents was achieved and stability was maintained for more than 12 months. No preferential spatial distribution of anchoring sites for attachment of iron oxide nanoparticles was observed, regardless of whether the EG flakes were used naked or functionalized with PEI molecules. The structural and physicochemical characteristics of the exfoliated expanded graphite and its hybrid nano-structures were investigated by SEM, TEM, FTIR and Raman techniques.
T2  - Journal of the Serbian Chemical Society
T1  - Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension
VL  - 79
IS  - 9
SP  - 1155
EP  - 1167
DO  - 10.2298/JSC131121019J
ER  - 

@article{
author = "Jović, Nataša G. and Calatayud, Maria Pilar and Sanz, Beatriz and Montone, Amelia and Goya, Gerardo F.",
year = "2014",
abstract = "Hybrid structures composed of exfoliated expanded graphite (EG) and iron oxide nanocrystals were produced by an ex situ process. The iron oxide nanoparticles coated with meso-2,3-dimercaptosuccinic acid (DMSA), or poly(acrylic acid) (PAA) were integrated onto the exfoliated EG flakes by mixing their aqueous suspensions at room temperature under the support of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinnimide (NHS). EG flakes both naked and functionalized with branched polyethylenimine (PEI) were employed. Complete integration of the two constituents was achieved and stability was maintained for more than 12 months. No preferential spatial distribution of anchoring sites for attachment of iron oxide nanoparticles was observed, regardless of whether the EG flakes were used naked or functionalized with PEI molecules. The structural and physicochemical characteristics of the exfoliated expanded graphite and its hybrid nano-structures were investigated by SEM, TEM, FTIR and Raman techniques.",
journal = "Journal of the Serbian Chemical Society",
title = "Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension",
volume = "79",
number = "9",
pages = "1155-1167",
doi = "10.2298/JSC131121019J"
}

Jović, N. G., Calatayud, M. P., Sanz, B., Montone, A.,& Goya, G. F.. (2014). Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension. in Journal of the Serbian Chemical Society, 79(9), 1155-1167.
https://doi.org/10.2298/JSC131121019J

Jović NG, Calatayud MP, Sanz B, Montone A, Goya GF. Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension. in Journal of the Serbian Chemical Society. 2014;79(9):1155-1167.
doi:10.2298/JSC131121019J .

Jović, Nataša G., Calatayud, Maria Pilar, Sanz, Beatriz, Montone, Amelia, Goya, Gerardo F., "Ex situ integration of iron oxide nanoparticles onto exfoliated expanded graphite flakes in aqueous suspension" in Journal of the Serbian Chemical Society, 79, no. 9 (2014):1155-1167,
https://doi.org/10.2298/JSC131121019J . .

TY  - JOUR
AU  - Antić, Bratislav
AU  - Kremenović, Aleksandar S.
AU  - Jović, Nataša G.
AU  - Pavlović, Miodrag B.
AU  - Jovalekić, Čedomir
AU  - Nikolić, Aleksandar S.
AU  - Goya, Gerardo F.
AU  - Weidenthaler, C.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6946
AB  - We present a study of the structural and magnetic properties of (Mn,Fe)(3-delta)O-4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)(2) x 2 H2O and Fe(OH)(3) powders as starting compounds. The resulting nanoparticles with a composition of the (Mn,Fe)(3-delta)O-4 type are found to have a core/shell structure with different Mn/Fe ratios in the core and at the surface. XPS analysis points to valences of +2, +3, and +4 for Mn and +3 for Fe at the particle surface. Combined results of XRPD, Mossbauer spectroscopy, and EDX analysis suggest that there is a deviation from stoichiometry in the nanoparticle core compared to the shell, accompanied by creation of cation polyvalence and vacancies. The value of saturation magnetization, M-S, of 73.5 emu/g at room temperature, is among the highest reported so far among nanocrystalline ferrite systems of similar composition. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700228]
T2  - Journal of Applied Physics
T1  - Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles
VL  - 111
IS  - 7
DO  - 10.1063/1.3700228
ER  - 

@article{
author = "Antić, Bratislav and Kremenović, Aleksandar S. and Jović, Nataša G. and Pavlović, Miodrag B. and Jovalekić, Čedomir and Nikolić, Aleksandar S. and Goya, Gerardo F. and Weidenthaler, C.",
year = "2012",
abstract = "We present a study of the structural and magnetic properties of (Mn,Fe)(3-delta)O-4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)(2) x 2 H2O and Fe(OH)(3) powders as starting compounds. The resulting nanoparticles with a composition of the (Mn,Fe)(3-delta)O-4 type are found to have a core/shell structure with different Mn/Fe ratios in the core and at the surface. XPS analysis points to valences of +2, +3, and +4 for Mn and +3 for Fe at the particle surface. Combined results of XRPD, Mossbauer spectroscopy, and EDX analysis suggest that there is a deviation from stoichiometry in the nanoparticle core compared to the shell, accompanied by creation of cation polyvalence and vacancies. The value of saturation magnetization, M-S, of 73.5 emu/g at room temperature, is among the highest reported so far among nanocrystalline ferrite systems of similar composition. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700228]",
journal = "Journal of Applied Physics",
title = "Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles",
volume = "111",
number = "7",
doi = "10.1063/1.3700228"
}

Antić, B., Kremenović, A. S., Jović, N. G., Pavlović, M. B., Jovalekić, Č., Nikolić, A. S., Goya, G. F.,& Weidenthaler, C.. (2012). Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles. in Journal of Applied Physics, 111(7).
https://doi.org/10.1063/1.3700228

Antić B, Kremenović AS, Jović NG, Pavlović MB, Jovalekić Č, Nikolić AS, Goya GF, Weidenthaler C. Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles. in Journal of Applied Physics. 2012;111(7).
doi:10.1063/1.3700228 .

Antić, Bratislav, Kremenović, Aleksandar S., Jović, Nataša G., Pavlović, Miodrag B., Jovalekić, Čedomir, Nikolić, Aleksandar S., Goya, Gerardo F., Weidenthaler, C., "Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles" in Journal of Applied Physics, 111, no. 7 (2012),
https://doi.org/10.1063/1.3700228 . .

TY  - JOUR
AU  - Radović, Magdalena
AU  - Vranješ-Đurić, Sanja
AU  - Nikolić, Nadežda S.
AU  - Janković, Drina
AU  - Goya, Gerardo F.
AU  - Torres, Teobaldo E.
AU  - Calatayud, Maria Pilar
AU  - Bruvera, Ignacio J.
AU  - Ibarra, M. Ricardo
AU  - Spasojević, Vojislav
AU  - Jančar, Boštjan
AU  - Antić, Bratislav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5175
AB  - Radio labeled albumin microspheres with encapsulated citric acid-coated magnetite nanoparticles were developed as a targeting approach to localize both radioactivity and magnetic energy at the tumor site. We present in vitro and in vivo studies of yttrium-90 (Y-90)-labeled human scrum albumin magnetic microspheres (HSAMMS) as a multifunctional agent for possible applications in a bimodal radionuclide-hyperthermia cancer therapy. The HSAMMS were produced using a modified emulsification-heat stabilization technique and contained 11 nm magnetite nanoparticles coated with citric acid, distributed as inhomogeneous clusters within the albumin microspheres. The size, size distribution and the morphology of magnetite nanoparticles and HSAMMS were determined by FESEM, HRTEM and SEM/FIB dual beam. The average particle size of the complete HSAMMS was 20 mu m, and they exhibited superparamagnetic behavior at room temperature. The in vitro experiments (in saline and human serum) revealed the high stability of the labeled HSAMMS in saline and human serum after 72 h. Following the intravenous administration of the Y-90-HSAMMS in rats, 88.81% of the activity localizes in the lungs after 1 h, with 82.67% remaining after 72 h. These data on Y-90-HSAMMS provide good evidence for their potential use in bimodal radionuclide-hyperthermia cancer therapy.
T2  - Journal of Materials Chemistry
T1  - Development and evaluation of Y-90-labeled albumin microspheres loaded with magnetite nanoparticles for possible applications in cancer therapy
VL  - 22
IS  - 45
SP  - 24017
EP  - 24025
DO  - 10.1039/c2jm35593k
ER  - 

@article{
author = "Radović, Magdalena and Vranješ-Đurić, Sanja and Nikolić, Nadežda S. and Janković, Drina and Goya, Gerardo F. and Torres, Teobaldo E. and Calatayud, Maria Pilar and Bruvera, Ignacio J. and Ibarra, M. Ricardo and Spasojević, Vojislav and Jančar, Boštjan and Antić, Bratislav",
year = "2012",
abstract = "Radio labeled albumin microspheres with encapsulated citric acid-coated magnetite nanoparticles were developed as a targeting approach to localize both radioactivity and magnetic energy at the tumor site. We present in vitro and in vivo studies of yttrium-90 (Y-90)-labeled human scrum albumin magnetic microspheres (HSAMMS) as a multifunctional agent for possible applications in a bimodal radionuclide-hyperthermia cancer therapy. The HSAMMS were produced using a modified emulsification-heat stabilization technique and contained 11 nm magnetite nanoparticles coated with citric acid, distributed as inhomogeneous clusters within the albumin microspheres. The size, size distribution and the morphology of magnetite nanoparticles and HSAMMS were determined by FESEM, HRTEM and SEM/FIB dual beam. The average particle size of the complete HSAMMS was 20 mu m, and they exhibited superparamagnetic behavior at room temperature. The in vitro experiments (in saline and human serum) revealed the high stability of the labeled HSAMMS in saline and human serum after 72 h. Following the intravenous administration of the Y-90-HSAMMS in rats, 88.81% of the activity localizes in the lungs after 1 h, with 82.67% remaining after 72 h. These data on Y-90-HSAMMS provide good evidence for their potential use in bimodal radionuclide-hyperthermia cancer therapy.",
journal = "Journal of Materials Chemistry",
title = "Development and evaluation of Y-90-labeled albumin microspheres loaded with magnetite nanoparticles for possible applications in cancer therapy",
volume = "22",
number = "45",
pages = "24017-24025",
doi = "10.1039/c2jm35593k"
}

Radović, M., Vranješ-Đurić, S., Nikolić, N. S., Janković, D., Goya, G. F., Torres, T. E., Calatayud, M. P., Bruvera, I. J., Ibarra, M. R., Spasojević, V., Jančar, B.,& Antić, B.. (2012). Development and evaluation of Y-90-labeled albumin microspheres loaded with magnetite nanoparticles for possible applications in cancer therapy. in Journal of Materials Chemistry, 22(45), 24017-24025.
https://doi.org/10.1039/c2jm35593k

Radović M, Vranješ-Đurić S, Nikolić NS, Janković D, Goya GF, Torres TE, Calatayud MP, Bruvera IJ, Ibarra MR, Spasojević V, Jančar B, Antić B. Development and evaluation of Y-90-labeled albumin microspheres loaded with magnetite nanoparticles for possible applications in cancer therapy. in Journal of Materials Chemistry. 2012;22(45):24017-24025.
doi:10.1039/c2jm35593k .

Radović, Magdalena, Vranješ-Đurić, Sanja, Nikolić, Nadežda S., Janković, Drina, Goya, Gerardo F., Torres, Teobaldo E., Calatayud, Maria Pilar, Bruvera, Ignacio J., Ibarra, M. Ricardo, Spasojević, Vojislav, Jančar, Boštjan, Antić, Bratislav, "Development and evaluation of Y-90-labeled albumin microspheres loaded with magnetite nanoparticles for possible applications in cancer therapy" in Journal of Materials Chemistry, 22, no. 45 (2012):24017-24025,
https://doi.org/10.1039/c2jm35593k . .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Antić, Bratislav
AU  - Goya, Gerardo F.
AU  - Spasojević, Vojislav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5125
AB  - We present a magnetic study of lithium ferrite nanoparticles of composition Li0.5Fe2.5O4, synthesized by a citrate gel decomposition method. The as prepared sample was composed of nearly spherical nanoparticles with an average particle size LT d GT (TEM)similar to 12 nm. Further annealing at 573 K and 673 K for 4 hours did not increase particle size noticeably, while annealing at 973 K led to morphology changes and significant increase in size ranging from 40 to above 200 nm. The magnetic properties of samples have been studied using Mossbauer specroscopy, and static magnetic measurements. The hyperfine parameters obtained from Mossbauer data at T = 10 K are in agreement to the bulk lithium ferrite phase. Annealed samples showed an evolution from monodomain structure to polycrystalline behaviour, what is evident from TEM imagines, as well as the evolution of the coercive filed, H-C, and the saturation magnetization, M-S, with particle size increase. The exchange interactions have been observed in the single-domain nanoparticles, which probably originate from their core-shell structure. At low temperatures and in high enough magnetic fields, the cubic magnetic anisotropy stays preserved and the magnetic moments in the particle core are aligned along LT 111 GT directions of the spinel structure.
T2  - Current Nanoscience
T1  - Magnetic Properties of Lithium Ferrite Nanoparticles with a Core/Shell Structure
VL  - 8
IS  - 5
SP  - 651
EP  - 658
DO  - 10.2174/157341312802884391
ER  - 

@article{
author = "Jović, Nataša G. and Antić, Bratislav and Goya, Gerardo F. and Spasojević, Vojislav",
year = "2012",
abstract = "We present a magnetic study of lithium ferrite nanoparticles of composition Li0.5Fe2.5O4, synthesized by a citrate gel decomposition method. The as prepared sample was composed of nearly spherical nanoparticles with an average particle size LT d GT (TEM)similar to 12 nm. Further annealing at 573 K and 673 K for 4 hours did not increase particle size noticeably, while annealing at 973 K led to morphology changes and significant increase in size ranging from 40 to above 200 nm. The magnetic properties of samples have been studied using Mossbauer specroscopy, and static magnetic measurements. The hyperfine parameters obtained from Mossbauer data at T = 10 K are in agreement to the bulk lithium ferrite phase. Annealed samples showed an evolution from monodomain structure to polycrystalline behaviour, what is evident from TEM imagines, as well as the evolution of the coercive filed, H-C, and the saturation magnetization, M-S, with particle size increase. The exchange interactions have been observed in the single-domain nanoparticles, which probably originate from their core-shell structure. At low temperatures and in high enough magnetic fields, the cubic magnetic anisotropy stays preserved and the magnetic moments in the particle core are aligned along LT 111 GT directions of the spinel structure.",
journal = "Current Nanoscience",
title = "Magnetic Properties of Lithium Ferrite Nanoparticles with a Core/Shell Structure",
volume = "8",
number = "5",
pages = "651-658",
doi = "10.2174/157341312802884391"
}

Jović, N. G., Antić, B., Goya, G. F.,& Spasojević, V.. (2012). Magnetic Properties of Lithium Ferrite Nanoparticles with a Core/Shell Structure. in Current Nanoscience, 8(5), 651-658.
https://doi.org/10.2174/157341312802884391

Jović NG, Antić B, Goya GF, Spasojević V. Magnetic Properties of Lithium Ferrite Nanoparticles with a Core/Shell Structure. in Current Nanoscience. 2012;8(5):651-658.
doi:10.2174/157341312802884391 .

Jović, Nataša G., Antić, Bratislav, Goya, Gerardo F., Spasojević, Vojislav, "Magnetic Properties of Lithium Ferrite Nanoparticles with a Core/Shell Structure" in Current Nanoscience, 8, no. 5 (2012):651-658,
https://doi.org/10.2174/157341312802884391 . .

TY  - JOUR
AU  - Antić, Bratislav
AU  - Rogan, Jelena R.
AU  - Kremenović, Aleksandar S.
AU  - Nikolić, Aleksandar S.
AU  - Vučinić-Vasić, Milica
AU  - Božanić, Dušan K.
AU  - Goya, Gerardo F.
AU  - Colomban, Ph
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4008
AB  - Spherical shaped nanoparticles of series Y2-xEuxO3 (x = 0.06, 0.10, 0.20, and 2) and Gd2-xEuxO3 (x = 0.06, 0.10) were prepared by thermolysis of 2,4-pentanedione complexes of Y, Gd, and Eu. The bixbyite phase of Gd2-xEuxO3 samples was formed at 500 degrees C, whereas the thermal decomposition of Y and Eu complexes mixtures occurred at higher temperatures. Linearity in the concentration dependence on lattice parameter confirmed the formation of solid solutions. The distribution of Eu3+ in Gd2-xEuxO3 was changed with thermal annealing: in the as-prepared sample (x = 0.10) the distribution was preferential at C-3i sites while in the annealed samples, Eu3+ were distributed at both C-2 and C-3i sites. Rietveld refinement of site occupancies as well as emission spectra showed a random distribution of cations in Y2-xEuxO3. The photoluminescence (PL) measurements of the sample showed red emission with the main peak at 614 nm (D-5(0)-F-7(2)). The PL intensity increased with increasing concentration of Eu3+ in both series. Infrared excitation was required to obtain good Raman spectra. The linear dependence of the main Raman peak wavenumber offers a non-destructive method for monitoring the substitution level and its homogeneity at the micron scale.
T2  - Nanotechnology
T1  - Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes
VL  - 21
IS  - 24
DO  - 10.1088/0957-4484/21/24/245702
ER  - 

@article{
author = "Antić, Bratislav and Rogan, Jelena R. and Kremenović, Aleksandar S. and Nikolić, Aleksandar S. and Vučinić-Vasić, Milica and Božanić, Dušan K. and Goya, Gerardo F. and Colomban, Ph",
year = "2010",
abstract = "Spherical shaped nanoparticles of series Y2-xEuxO3 (x = 0.06, 0.10, 0.20, and 2) and Gd2-xEuxO3 (x = 0.06, 0.10) were prepared by thermolysis of 2,4-pentanedione complexes of Y, Gd, and Eu. The bixbyite phase of Gd2-xEuxO3 samples was formed at 500 degrees C, whereas the thermal decomposition of Y and Eu complexes mixtures occurred at higher temperatures. Linearity in the concentration dependence on lattice parameter confirmed the formation of solid solutions. The distribution of Eu3+ in Gd2-xEuxO3 was changed with thermal annealing: in the as-prepared sample (x = 0.10) the distribution was preferential at C-3i sites while in the annealed samples, Eu3+ were distributed at both C-2 and C-3i sites. Rietveld refinement of site occupancies as well as emission spectra showed a random distribution of cations in Y2-xEuxO3. The photoluminescence (PL) measurements of the sample showed red emission with the main peak at 614 nm (D-5(0)-F-7(2)). The PL intensity increased with increasing concentration of Eu3+ in both series. Infrared excitation was required to obtain good Raman spectra. The linear dependence of the main Raman peak wavenumber offers a non-destructive method for monitoring the substitution level and its homogeneity at the micron scale.",
journal = "Nanotechnology",
title = "Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes",
volume = "21",
number = "24",
doi = "10.1088/0957-4484/21/24/245702"
}

Antić, B., Rogan, J. R., Kremenović, A. S., Nikolić, A. S., Vučinić-Vasić, M., Božanić, D. K., Goya, G. F.,& Colomban, P.. (2010). Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes. in Nanotechnology, 21(24).
https://doi.org/10.1088/0957-4484/21/24/245702

Antić B, Rogan JR, Kremenović AS, Nikolić AS, Vučinić-Vasić M, Božanić DK, Goya GF, Colomban P. Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes. in Nanotechnology. 2010;21(24).
doi:10.1088/0957-4484/21/24/245702 .

Antić, Bratislav, Rogan, Jelena R., Kremenović, Aleksandar S., Nikolić, Aleksandar S., Vučinić-Vasić, Milica, Božanić, Dušan K., Goya, Gerardo F., Colomban, Ph, "Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes" in Nanotechnology, 21, no. 24 (2010),
https://doi.org/10.1088/0957-4484/21/24/245702 . .

TY  - JOUR
AU  - Cvejic, Z.
AU  - Antić, Bratislav
AU  - Kremenović, Aleksandar S.
AU  - Rakić, Srđan
AU  - Goya, Gerardo F.
AU  - Rechenberg, H. R.
AU  - Jovalekić, Čedomir
AU  - Spasojević, Vojislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3666
AB  - In this work we report results on the influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite. A series of Fe(2.85)RE(0.15)O(4) (RE = Gd, Dy, Ho, Tm and Yb) samples have been prepared by high energy ball milling. Structure/microstructure investigations of two selected samples Fe(2.85)Gd(0.15)O(4) and Fe(2.85)Tm(0.15)O(4), represent an extension of the previously published results on Fe(3)O(4)/gamma-Fe(2)O(3), Fe(2.85)Y(0.15)O(4) and Fe(2.55)In(0.45)O(4) [Z. Cvejic, S. Rakic, A. Kremenovic, B. Antic, C. Jovalekic. Ph. Colomban, Sol. State Sciences 8 (2006) 908], while magnetic characterization has been done for all the samples. Crystallite/particle size and strain determined by X-ray diffractometry and Transmission electron microscopy (TEM) confirmed the nanostructured nature of the mechanosynthesized materials. X-ray powder diffraction was used to analyze anisotropic line broadening effects through the Rietveld method. The size anisotropy was found to be small while strain anisotropy was large, indicating nonuniform distribution of deffects in the presence of Gd and Tm in the crystal structure. Superparamagnetic(SPM) behavior at room temperature was observed for all samples studied. The Y-substituted Fe(3)O(4) had the largest He and the lowest M(S). We discuss the changes in magnetic properties in relation to their magnetic anisotropy and microstructure. High field irreversibility (H GT 20kOe) in ZFC/FC magnetization versus temperature indicates the existence of high magnetocrystalline and/or strain induced anisotropy. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite
VL  - 472
IS  - 1-2
SP  - 571
EP  - 575
DO  - 10.1016/j.jallcom.2008.05.026
ER  - 

@article{
author = "Cvejic, Z. and Antić, Bratislav and Kremenović, Aleksandar S. and Rakić, Srđan and Goya, Gerardo F. and Rechenberg, H. R. and Jovalekić, Čedomir and Spasojević, Vojislav",
year = "2009",
abstract = "In this work we report results on the influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite. A series of Fe(2.85)RE(0.15)O(4) (RE = Gd, Dy, Ho, Tm and Yb) samples have been prepared by high energy ball milling. Structure/microstructure investigations of two selected samples Fe(2.85)Gd(0.15)O(4) and Fe(2.85)Tm(0.15)O(4), represent an extension of the previously published results on Fe(3)O(4)/gamma-Fe(2)O(3), Fe(2.85)Y(0.15)O(4) and Fe(2.55)In(0.45)O(4) [Z. Cvejic, S. Rakic, A. Kremenovic, B. Antic, C. Jovalekic. Ph. Colomban, Sol. State Sciences 8 (2006) 908], while magnetic characterization has been done for all the samples. Crystallite/particle size and strain determined by X-ray diffractometry and Transmission electron microscopy (TEM) confirmed the nanostructured nature of the mechanosynthesized materials. X-ray powder diffraction was used to analyze anisotropic line broadening effects through the Rietveld method. The size anisotropy was found to be small while strain anisotropy was large, indicating nonuniform distribution of deffects in the presence of Gd and Tm in the crystal structure. Superparamagnetic(SPM) behavior at room temperature was observed for all samples studied. The Y-substituted Fe(3)O(4) had the largest He and the lowest M(S). We discuss the changes in magnetic properties in relation to their magnetic anisotropy and microstructure. High field irreversibility (H GT 20kOe) in ZFC/FC magnetization versus temperature indicates the existence of high magnetocrystalline and/or strain induced anisotropy. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite",
volume = "472",
number = "1-2",
pages = "571-575",
doi = "10.1016/j.jallcom.2008.05.026"
}

Cvejic, Z., Antić, B., Kremenović, A. S., Rakić, S., Goya, G. F., Rechenberg, H. R., Jovalekić, Č.,& Spasojević, V.. (2009). Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite. in Journal of Alloys and Compounds, 472(1-2), 571-575.
https://doi.org/10.1016/j.jallcom.2008.05.026

Cvejic Z, Antić B, Kremenović AS, Rakić S, Goya GF, Rechenberg HR, Jovalekić Č, Spasojević V. Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite. in Journal of Alloys and Compounds. 2009;472(1-2):571-575.
doi:10.1016/j.jallcom.2008.05.026 .

Cvejic, Z., Antić, Bratislav, Kremenović, Aleksandar S., Rakić, Srđan, Goya, Gerardo F., Rechenberg, H. R., Jovalekić, Čedomir, Spasojević, Vojislav, "Influence of heavy rare earth ions substitution on microstructure and magnetism of nanocrystalline magnetite" in Journal of Alloys and Compounds, 472, no. 1-2 (2009):571-575,
https://doi.org/10.1016/j.jallcom.2008.05.026 . .

TY  - JOUR
AU  - Jović, Nataša G.
AU  - Masadeh, Ahmad S.
AU  - Kremenović, Aleksandar S.
AU  - Antić, Bratislav
AU  - Blanuša, Jovan
AU  - Cvjetićanin, Nikola
AU  - Goya, Gerardo F.
AU  - Antisari, Marco Vittori
AU  - Božin, Emil S.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3829
AB  - Pure, crystalline, similar to 10 nm lithium ferrite phase (Li0.5Fe2.5O4), was Successfully synthesized at very low temperature using a modified combustion method. The crystal structure and microstructure evolution of this system upon annealing were monitored by a careful investigation of X-ray diffractograms collected on a synchrotron source. Comparative analysis of the results obtained from the full profile Rietveld method (in reciprocal space) and the pair distribution function method (in direct space) was carried Out. Nanocrystalline samples exhibit similar crystal structure, on average, with a partial ordering of Li+ and Fe3+ ions between octahedral 4b and 12d sites on the spinel crystal lattice (space group P4(3)32). After annealing at 973 K, cation distribution changes to a completely ordered, resembling that which is seen in the bulk lithium ferrite. The PDF analysis reveals abnormally high values of oxygen atomic displacement parameters in tetrahedral 8c sites (OI) indicating a significant disordering of the OI network and suggests migration of lithium ions from 4b sites to the outer layers of nanoparticles. Analysis of room temperature Mossbauer spectra has shown that the hyperfine field for Fe3+ ions in tetrahedral 8c sites is the most sensitive on increasing the particle size and improving the crystallinity. From the differential thermal analysis, it was found that a lower driving force is required to induce an order-disorder phase transition in nanocrysalline samples, compared to the bulk-like sample, presumably due to the higher crystal disordering in these samples.
T2  - Journal of Physical Chemistry. C
T1  - Effects of Thermal Annealing on Structural and Magnetic Properties of Lithium Ferrite Nanoparticles
VL  - 113
IS  - 48
SP  - 20559
EP  - 20567
DO  - 10.1021/jp907559y
ER  - 

@article{
author = "Jović, Nataša G. and Masadeh, Ahmad S. and Kremenović, Aleksandar S. and Antić, Bratislav and Blanuša, Jovan and Cvjetićanin, Nikola and Goya, Gerardo F. and Antisari, Marco Vittori and Božin, Emil S.",
year = "2009",
abstract = "Pure, crystalline, similar to 10 nm lithium ferrite phase (Li0.5Fe2.5O4), was Successfully synthesized at very low temperature using a modified combustion method. The crystal structure and microstructure evolution of this system upon annealing were monitored by a careful investigation of X-ray diffractograms collected on a synchrotron source. Comparative analysis of the results obtained from the full profile Rietveld method (in reciprocal space) and the pair distribution function method (in direct space) was carried Out. Nanocrystalline samples exhibit similar crystal structure, on average, with a partial ordering of Li+ and Fe3+ ions between octahedral 4b and 12d sites on the spinel crystal lattice (space group P4(3)32). After annealing at 973 K, cation distribution changes to a completely ordered, resembling that which is seen in the bulk lithium ferrite. The PDF analysis reveals abnormally high values of oxygen atomic displacement parameters in tetrahedral 8c sites (OI) indicating a significant disordering of the OI network and suggests migration of lithium ions from 4b sites to the outer layers of nanoparticles. Analysis of room temperature Mossbauer spectra has shown that the hyperfine field for Fe3+ ions in tetrahedral 8c sites is the most sensitive on increasing the particle size and improving the crystallinity. From the differential thermal analysis, it was found that a lower driving force is required to induce an order-disorder phase transition in nanocrysalline samples, compared to the bulk-like sample, presumably due to the higher crystal disordering in these samples.",
journal = "Journal of Physical Chemistry. C",
title = "Effects of Thermal Annealing on Structural and Magnetic Properties of Lithium Ferrite Nanoparticles",
volume = "113",
number = "48",
pages = "20559-20567",
doi = "10.1021/jp907559y"
}

Jović, N. G., Masadeh, A. S., Kremenović, A. S., Antić, B., Blanuša, J., Cvjetićanin, N., Goya, G. F., Antisari, M. V.,& Božin, E. S.. (2009). Effects of Thermal Annealing on Structural and Magnetic Properties of Lithium Ferrite Nanoparticles. in Journal of Physical Chemistry. C, 113(48), 20559-20567.
https://doi.org/10.1021/jp907559y

Jović NG, Masadeh AS, Kremenović AS, Antić B, Blanuša J, Cvjetićanin N, Goya GF, Antisari MV, Božin ES. Effects of Thermal Annealing on Structural and Magnetic Properties of Lithium Ferrite Nanoparticles. in Journal of Physical Chemistry. C. 2009;113(48):20559-20567.
doi:10.1021/jp907559y .

Jović, Nataša G., Masadeh, Ahmad S., Kremenović, Aleksandar S., Antić, Bratislav, Blanuša, Jovan, Cvjetićanin, Nikola, Goya, Gerardo F., Antisari, Marco Vittori, Božin, Emil S., "Effects of Thermal Annealing on Structural and Magnetic Properties of Lithium Ferrite Nanoparticles" in Journal of Physical Chemistry. C, 113, no. 48 (2009):20559-20567,
https://doi.org/10.1021/jp907559y . .

TY  - JOUR
AU  - Antić, Bratislav
AU  - Goya, Gerardo F.
AU  - Rechenberg, HR
AU  - Kusigerski, Vladan
AU  - Jović, Nataša G.
AU  - Mitrić, Miodrag
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2713
AB  - DC magnetization and AC susceptibility measurements point to the formation of a spin glass state in the ternary spinel-type compounds Li1.33xCo2-2xTi1+0.67xO4. The dynamics of spin freezing was analysed with both the critical slowing down and the thermally activated dynamics models. The parameter values obtained, as well as the behaviour of the zero- field-cooled and field-cooled magnetization as a function of temperature, indicate the existence of a cluster glass state in disordered spinel samples with x = 0.25 and 0.40, and probably also in the ordered spinel with x = 0.50. Ordered spinel samples with x = 0.75 and 0.875 were found to be paramagnetic down to the temperature of 1.7 K with a random distribution of Co2+ ions.
T2  - Journal of Physics: Condensed Matter
T1  - Spin glass formation in Li-substituted Co2TiO4 spinel
VL  - 16
IS  - 4
SP  - 651
EP  - 659
DO  - 10.1088/0953-8984/16/4/014
ER  - 

@article{
author = "Antić, Bratislav and Goya, Gerardo F. and Rechenberg, HR and Kusigerski, Vladan and Jović, Nataša G. and Mitrić, Miodrag",
year = "2004",
abstract = "DC magnetization and AC susceptibility measurements point to the formation of a spin glass state in the ternary spinel-type compounds Li1.33xCo2-2xTi1+0.67xO4. The dynamics of spin freezing was analysed with both the critical slowing down and the thermally activated dynamics models. The parameter values obtained, as well as the behaviour of the zero- field-cooled and field-cooled magnetization as a function of temperature, indicate the existence of a cluster glass state in disordered spinel samples with x = 0.25 and 0.40, and probably also in the ordered spinel with x = 0.50. Ordered spinel samples with x = 0.75 and 0.875 were found to be paramagnetic down to the temperature of 1.7 K with a random distribution of Co2+ ions.",
journal = "Journal of Physics: Condensed Matter",
title = "Spin glass formation in Li-substituted Co2TiO4 spinel",
volume = "16",
number = "4",
pages = "651-659",
doi = "10.1088/0953-8984/16/4/014"
}

Antić, B., Goya, G. F., Rechenberg, H., Kusigerski, V., Jović, N. G.,& Mitrić, M.. (2004). Spin glass formation in Li-substituted Co2TiO4 spinel. in Journal of Physics: Condensed Matter, 16(4), 651-659.
https://doi.org/10.1088/0953-8984/16/4/014

Antić B, Goya GF, Rechenberg H, Kusigerski V, Jović NG, Mitrić M. Spin glass formation in Li-substituted Co2TiO4 spinel. in Journal of Physics: Condensed Matter. 2004;16(4):651-659.
doi:10.1088/0953-8984/16/4/014 .

Antić, Bratislav, Goya, Gerardo F., Rechenberg, HR, Kusigerski, Vladan, Jović, Nataša G., Mitrić, Miodrag, "Spin glass formation in Li-substituted Co2TiO4 spinel" in Journal of Physics: Condensed Matter, 16, no. 4 (2004):651-659,
https://doi.org/10.1088/0953-8984/16/4/014 . .