TY  - CONF
AU  - Jovanović, Sonja
AU  - Grujičić, Marija
AU  - Jelić, Marko
AU  - Vukomanović, Marija
AU  - Spreitzer, Matjaž
AU  - Maček-Kržmanc, Marjeta
AU  - Peddis, Davide
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12297
AB  - In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). In order to isolate the contribution of heteroatoms, the synthesis condition were optimized to allow preparation of nonagglomerated particles with the narrow particle size and shape distribution, including the constant amount of capping agent. The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis, is 22-28 %, which indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behavior at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties that can be tuned for different applications.
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
T1  - Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12297
ER  - 

@conference{
author = "Jovanović, Sonja and Grujičić, Marija and Jelić, Marko and Vukomanović, Marija and Spreitzer, Matjaž and Maček-Kržmanc, Marjeta and Peddis, Davide",
year = "2022",
abstract = "In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). In order to isolate the contribution of heteroatoms, the synthesis condition were optimized to allow preparation of nonagglomerated particles with the narrow particle size and shape distribution, including the constant amount of capping agent. The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis, is 22-28 %, which indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behavior at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties that can be tuned for different applications.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts",
title = "Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12297"
}

Jovanović, S., Grujičić, M., Jelić, M., Vukomanović, M., Spreitzer, M., Maček-Kržmanc, M.,& Peddis, D.. (2022). Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 57-57.
https://hdl.handle.net/21.15107/rcub_vinar_12297

Jovanović S, Grujičić M, Jelić M, Vukomanović M, Spreitzer M, Maček-Kržmanc M, Peddis D. Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts. 2022;:57-57.
https://hdl.handle.net/21.15107/rcub_vinar_12297 .

Jovanović, Sonja, Grujičić, Marija, Jelić, Marko, Vukomanović, Marija, Spreitzer, Matjaž, Maček-Kržmanc, Marjeta, Peddis, Davide, "Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles" in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts (2022):57-57,
https://hdl.handle.net/21.15107/rcub_vinar_12297 .

TY  - CONF
AU  - Jovanović, Sonja
AU  - Vukomanović, Marija
AU  - Spreitzer, Matjaž
AU  - Jovanović, Zoran
AU  - Maček- Kržmanc, Marjeta
AU  - Grujičić, Marija
AU  - Peddis, Davide
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12532
AB  - In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behaviour at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
T1  - The influence of heteroatoms on physicochemical properties of cobalt ferrite nanoparticles
SP  - 107
EP  - 107
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12532
ER  - 

@conference{
author = "Jovanović, Sonja and Vukomanović, Marija and Spreitzer, Matjaž and Jovanović, Zoran and Maček- Kržmanc, Marjeta and Grujičić, Marija and Peddis, Davide",
year = "2021",
abstract = "In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behaviour at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts",
title = "The influence of heteroatoms on physicochemical properties of cobalt ferrite nanoparticles",
pages = "107-107",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12532"
}

Jovanović, S., Vukomanović, M., Spreitzer, M., Jovanović, Z., Maček- Kržmanc, M., Grujičić, M.,& Peddis, D.. (2021). The influence of heteroatoms on physicochemical properties of cobalt ferrite nanoparticles. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., 107-107.
https://hdl.handle.net/21.15107/rcub_vinar_12532

Jovanović S, Vukomanović M, Spreitzer M, Jovanović Z, Maček- Kržmanc M, Grujičić M, Peddis D. The influence of heteroatoms on physicochemical properties of cobalt ferrite nanoparticles. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts. 2021;:107-107.
https://hdl.handle.net/21.15107/rcub_vinar_12532 .

Jovanović, Sonja, Vukomanović, Marija, Spreitzer, Matjaž, Jovanović, Zoran, Maček- Kržmanc, Marjeta, Grujičić, Marija, Peddis, Davide, "The influence of heteroatoms on physicochemical properties of cobalt ferrite nanoparticles" in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts (2021):107-107,
https://hdl.handle.net/21.15107/rcub_vinar_12532 .

TY  - JOUR
AU  - Lukić, Miodrag
AU  - Veselinović, Ljiljana M.
AU  - Stojanović, Zoran S.
AU  - Maček Kržmanc, Marjeta
AU  - Bračko, Ines
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/476
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7447
AB  - We report unusual sintering behavior of Ca-deficient hydroxyapatite processed with different heating rates; particularly, faster heating resulted in higher densification. We hypothesize that faster heating delays formation of β-tricalcium phosphate which yields to unobstructed densification in intermediate sintering stage, allowing further tailoring of both microstructure and phase composition (hydroxyapatite/tricalcium phosphate).
PB  - Elsevier
T2  - Materials Letters
T1  - Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders
SP  - 331
EP  - 335
DO  - 10.1016/j.matlet.2011.10.085
ER  - 

@article{
author = "Lukić, Miodrag and Veselinović, Ljiljana M. and Stojanović, Zoran S. and Maček Kržmanc, Marjeta and Bračko, Ines and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
abstract = "We report unusual sintering behavior of Ca-deficient hydroxyapatite processed with different heating rates; particularly, faster heating resulted in higher densification. We hypothesize that faster heating delays formation of β-tricalcium phosphate which yields to unobstructed densification in intermediate sintering stage, allowing further tailoring of both microstructure and phase composition (hydroxyapatite/tricalcium phosphate).",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders",
pages = "331-335",
doi = "10.1016/j.matlet.2011.10.085"
}

Lukić, M., Veselinović, L. M., Stojanović, Z. S., Maček Kržmanc, M., Bračko, I., Škapin, S. D., Marković, S.,& Uskoković, D.. (2012). Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders. in Materials Letters
Elsevier., 331-335.
https://doi.org/10.1016/j.matlet.2011.10.085

Lukić M, Veselinović LM, Stojanović ZS, Maček Kržmanc M, Bračko I, Škapin SD, Marković S, Uskoković D. Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders. in Materials Letters. 2012;:331-335.
doi:10.1016/j.matlet.2011.10.085 .

Lukić, Miodrag, Veselinović, Ljiljana M., Stojanović, Zoran S., Maček Kržmanc, Marjeta, Bračko, Ines, Škapin, Srečo Davor, Marković, Smilja, Uskoković, Dragan, "Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders" in Materials Letters (2012):331-335,
https://doi.org/10.1016/j.matlet.2011.10.085 . .