TY  - JOUR
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Bibić, Nataša M.
PY  - 2011
UR  - https://doaj.org/article/e0d5a6877a4c44e58de76121026415e7
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7703
AB  - This paper presents a study of microstructural changes induced in CrN layers by irradiation with 120 keV argon ions. The layers were deposited on (100) Si wafers, at different nitrogen partial pressures (2×10^-4, 3.5×10^-4 and 5×10^-4 mbar), to a total thickness of 260–280 nm. During deposition the substrates were held at 150°C. After deposition the samples were irradiated with argon ions to the fluences of 1×10^15 and 1×10^16 ions/cm2, under the vacuum of 7×10^-6 mbar. Characterisation of the samples structure and morphology were performed by X-ray diffraction (XRD) analysis and cross-sectional transmission electron microscopy (XTEM), and the concentration profiles were determined by Rutheford backscattering (RBS) spectrometry. It was found that the layer composition strongly depends on the nitrogen partial pressure during deposition. A pure stoichiometric CrN phase was achieved for the highest nitrogen partial pressure (5×10^-4 mbar). Argon ions irradiation induces microstructural changes in the CrN layers such as variation of the lattice constants, micro-strain and mean grain size.
T2  - Processing and Application of Ceramics
T1  - Ion-beam irradiation effects on reactively sputtered CrN layers
VL  - 5
IS  - 1
SP  - 25
EP  - 29
DO  - 10.2298/PAC1101025N
ER  - 

@article{
author = "Novaković, Mirjana M. and Popović, Maja and Bibić, Nataša M.",
year = "2011",
abstract = "This paper presents a study of microstructural changes induced in CrN layers by irradiation with 120 keV argon ions. The layers were deposited on (100) Si wafers, at different nitrogen partial pressures (2×10^-4, 3.5×10^-4 and 5×10^-4 mbar), to a total thickness of 260–280 nm. During deposition the substrates were held at 150°C. After deposition the samples were irradiated with argon ions to the fluences of 1×10^15 and 1×10^16 ions/cm2, under the vacuum of 7×10^-6 mbar. Characterisation of the samples structure and morphology were performed by X-ray diffraction (XRD) analysis and cross-sectional transmission electron microscopy (XTEM), and the concentration profiles were determined by Rutheford backscattering (RBS) spectrometry. It was found that the layer composition strongly depends on the nitrogen partial pressure during deposition. A pure stoichiometric CrN phase was achieved for the highest nitrogen partial pressure (5×10^-4 mbar). Argon ions irradiation induces microstructural changes in the CrN layers such as variation of the lattice constants, micro-strain and mean grain size.",
journal = "Processing and Application of Ceramics",
title = "Ion-beam irradiation effects on reactively sputtered CrN layers",
volume = "5",
number = "1",
pages = "25-29",
doi = "10.2298/PAC1101025N"
}

Novaković, M. M., Popović, M.,& Bibić, N. M.. (2011). Ion-beam irradiation effects on reactively sputtered CrN layers. in Processing and Application of Ceramics, 5(1), 25-29.
https://doi.org/10.2298/PAC1101025N

Novaković MM, Popović M, Bibić NM. Ion-beam irradiation effects on reactively sputtered CrN layers. in Processing and Application of Ceramics. 2011;5(1):25-29.
doi:10.2298/PAC1101025N .

Novaković, Mirjana M., Popović, Maja, Bibić, Nataša M., "Ion-beam irradiation effects on reactively sputtered CrN layers" in Processing and Application of Ceramics, 5, no. 1 (2011):25-29,
https://doi.org/10.2298/PAC1101025N . .

TY  - JOUR
AU  - Popović, Maja
AU  - Novaković, Mirjana M.
AU  - Rakočević, Zlatko Lj.
AU  - Bibić, Nataša M.
PY  - 2011
UR  - https://doaj.org/article/dc9f3939725e4c5f8759a8d53940e662
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7704
AB  - In this work, the effects of 120 keV Ar+ ion implantation on the structural properties of TiN thin films were investigated. TiN layers were deposited by d.c. reactive sputtering on Si(100) wafers at room temperature or at 150°C. The thickness of TiN layers was ~240 nm. After deposition the samples were irradiated with 120 keV argon ions to the fluencies of 1×10^15 and 1×10^16 ions/cm2. Structural characterisation was performed with Rutherford backscattering spectroscopy (RBS), cross-sectional transmission electron microscopy (XTEM), grazing angle X-ray diffraction (XRD) and atomic force microscopy (AFM). It was found that the argon ion irradiation induced the changes in the lattice constant, mean grain size, micro-strain and surface morphology of the TiN layers. The observed micro-structural changes are due to the formation of the high density damage region in the TiN thin film structure.
T2  - Processing and Application of Ceramics
T1  - Structural changes induced by argon ion irradiation in TiN thin films
VL  - 5
IS  - 1
SP  - 19
EP  - 23
DO  - 10.2298/PAC1101019P
ER  - 

@article{
author = "Popović, Maja and Novaković, Mirjana M. and Rakočević, Zlatko Lj. and Bibić, Nataša M.",
year = "2011",
abstract = "In this work, the effects of 120 keV Ar+ ion implantation on the structural properties of TiN thin films were investigated. TiN layers were deposited by d.c. reactive sputtering on Si(100) wafers at room temperature or at 150°C. The thickness of TiN layers was ~240 nm. After deposition the samples were irradiated with 120 keV argon ions to the fluencies of 1×10^15 and 1×10^16 ions/cm2. Structural characterisation was performed with Rutherford backscattering spectroscopy (RBS), cross-sectional transmission electron microscopy (XTEM), grazing angle X-ray diffraction (XRD) and atomic force microscopy (AFM). It was found that the argon ion irradiation induced the changes in the lattice constant, mean grain size, micro-strain and surface morphology of the TiN layers. The observed micro-structural changes are due to the formation of the high density damage region in the TiN thin film structure.",
journal = "Processing and Application of Ceramics",
title = "Structural changes induced by argon ion irradiation in TiN thin films",
volume = "5",
number = "1",
pages = "19-23",
doi = "10.2298/PAC1101019P"
}

Popović, M., Novaković, M. M., Rakočević, Z. Lj.,& Bibić, N. M.. (2011). Structural changes induced by argon ion irradiation in TiN thin films. in Processing and Application of Ceramics, 5(1), 19-23.
https://doi.org/10.2298/PAC1101019P

Popović M, Novaković MM, Rakočević ZL, Bibić NM. Structural changes induced by argon ion irradiation in TiN thin films. in Processing and Application of Ceramics. 2011;5(1):19-23.
doi:10.2298/PAC1101019P .

Popović, Maja, Novaković, Mirjana M., Rakočević, Zlatko Lj., Bibić, Nataša M., "Structural changes induced by argon ion irradiation in TiN thin films" in Processing and Application of Ceramics, 5, no. 1 (2011):19-23,
https://doi.org/10.2298/PAC1101019P . .

TY  - JOUR
AU  - Nešić, Mioljub V.
AU  - Popović, Marica N.
AU  - Galović, Slobodanka
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4574
AB  - In this work, the thermoelastic component of the photoacoustic response is derived, including the thermal memory of the material. The comparison between this model and the classic one, which does not account for the influence of thermal memory is made. It has been noticed that the two models tend to overlap at very high and very low frequencies of the light modulation spectrum, while in the middle range some deviations become more apparent, which proves that thermal memory must be taken into account. It has also been shown that the limits of this range are the function of heat propagation velocity and thickness of the sample. Based upon the processing of obtained data, it has been concluded that the characteristics of the output signal, in the range of the interest, are highly influenced by thermal dynamic qualities, like heat diffusivity and thermal relaxation time, as well as the sample thickness.
T2  - Hemijska industrija
T1  - Influence of Thermal Memory on the Thermoelastic Bending Component of Photoacoustic Response
VL  - 65
IS  - 3
SP  - 219
EP  - 227
DO  - 10.2298/HEMIND110209021N
ER  - 

@article{
author = "Nešić, Mioljub V. and Popović, Marica N. and Galović, Slobodanka",
year = "2011",
abstract = "In this work, the thermoelastic component of the photoacoustic response is derived, including the thermal memory of the material. The comparison between this model and the classic one, which does not account for the influence of thermal memory is made. It has been noticed that the two models tend to overlap at very high and very low frequencies of the light modulation spectrum, while in the middle range some deviations become more apparent, which proves that thermal memory must be taken into account. It has also been shown that the limits of this range are the function of heat propagation velocity and thickness of the sample. Based upon the processing of obtained data, it has been concluded that the characteristics of the output signal, in the range of the interest, are highly influenced by thermal dynamic qualities, like heat diffusivity and thermal relaxation time, as well as the sample thickness.",
journal = "Hemijska industrija",
title = "Influence of Thermal Memory on the Thermoelastic Bending Component of Photoacoustic Response",
volume = "65",
number = "3",
pages = "219-227",
doi = "10.2298/HEMIND110209021N"
}

Nešić, M. V., Popović, M. N.,& Galović, S.. (2011). Influence of Thermal Memory on the Thermoelastic Bending Component of Photoacoustic Response. in Hemijska industrija, 65(3), 219-227.
https://doi.org/10.2298/HEMIND110209021N

Nešić MV, Popović MN, Galović S. Influence of Thermal Memory on the Thermoelastic Bending Component of Photoacoustic Response. in Hemijska industrija. 2011;65(3):219-227.
doi:10.2298/HEMIND110209021N .

Nešić, Mioljub V., Popović, Marica N., Galović, Slobodanka, "Influence of Thermal Memory on the Thermoelastic Bending Component of Photoacoustic Response" in Hemijska industrija, 65, no. 3 (2011):219-227,
https://doi.org/10.2298/HEMIND110209021N . .

TY  - CONF
AU  - Radović, Ivan
AU  - Borka Jovanović, Vesna
AU  - Mišković, Zoran
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12642
AB  - We use a quantum hydrodynamic (QHD) model to describe the high-frequency plasmon excitations of the carbon valence electrons responding to fast ions which move parallel to a single sheet of graphene supported by an insulating substrate. We calculate the stopping and the image forces on ions. Numerical results are obtained showing the effects of variation in size of the gap between graphene and the SiO2 substrate, as well as the effects of a finite frictional coefficient, on these quantities
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Interactions of fast ions with supported graphene: Quantum hydrodynamic model
IS  - 89
SP  - 117
EP  - 220
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12642
ER  - 

@conference{
author = "Radović, Ivan and Borka Jovanović, Vesna and Mišković, Zoran",
year = "2010",
abstract = "We use a quantum hydrodynamic (QHD) model to describe the high-frequency plasmon excitations of the carbon valence electrons responding to fast ions which move parallel to a single sheet of graphene supported by an insulating substrate. We calculate the stopping and the image forces on ions. Numerical results are obtained showing the effects of variation in size of the gap between graphene and the SiO2 substrate, as well as the effects of a finite frictional coefficient, on these quantities",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Interactions of fast ions with supported graphene: Quantum hydrodynamic model",
number = "89",
pages = "117-220",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12642"
}

Radović, I., Borka Jovanović, V.,& Mišković, Z.. (2010). Interactions of fast ions with supported graphene: Quantum hydrodynamic model. in Publications of the Astronomical Observatory of Belgrade(89), 117-220.
https://hdl.handle.net/21.15107/rcub_vinar_12642

Radović I, Borka Jovanović V, Mišković Z. Interactions of fast ions with supported graphene: Quantum hydrodynamic model. in Publications of the Astronomical Observatory of Belgrade. 2010;(89):117-220.
https://hdl.handle.net/21.15107/rcub_vinar_12642 .

Radović, Ivan, Borka Jovanović, Vesna, Mišković, Zoran, "Interactions of fast ions with supported graphene: Quantum hydrodynamic model" in Publications of the Astronomical Observatory of Belgrade, no. 89 (2010):117-220,
https://hdl.handle.net/21.15107/rcub_vinar_12642 .

TY  - CONF
AU  - Radović, Ivan
AU  - Bibić, Nataša M.
AU  - Mišković, Zoran L.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6908
AB  - We evaluate the stopping and image forces on a charged particle moving parallel to a single sheet of graphene supported by an insulating substrate under the gating conditions. The forces are presented as functions of the particle speed and the particle distance for a broad range of charge-carrier densities in graphene. We also consider the effects of a finite gap between graphene and a supporting substrate, as well as the effects of a finite damping rate that is included through the use of Mermins procedure. The damping rate is estimated from a tentative comparison of the Mermin loss function with a high-resolution reflection electron energy loss spectroscopy experiment.
C3  - Journal of Physics: Conference Series
T1  - Interactions of ions with graphene
VL  - 257
DO  - 10.1088/1742-6596/257/1/012011
ER  - 

@conference{
author = "Radović, Ivan and Bibić, Nataša M. and Mišković, Zoran L.",
year = "2010",
abstract = "We evaluate the stopping and image forces on a charged particle moving parallel to a single sheet of graphene supported by an insulating substrate under the gating conditions. The forces are presented as functions of the particle speed and the particle distance for a broad range of charge-carrier densities in graphene. We also consider the effects of a finite gap between graphene and a supporting substrate, as well as the effects of a finite damping rate that is included through the use of Mermins procedure. The damping rate is estimated from a tentative comparison of the Mermin loss function with a high-resolution reflection electron energy loss spectroscopy experiment.",
journal = "Journal of Physics: Conference Series",
title = "Interactions of ions with graphene",
volume = "257",
doi = "10.1088/1742-6596/257/1/012011"
}

Radović, I., Bibić, N. M.,& Mišković, Z. L.. (2010). Interactions of ions with graphene. in Journal of Physics: Conference Series, 257.
https://doi.org/10.1088/1742-6596/257/1/012011

Radović I, Bibić NM, Mišković ZL. Interactions of ions with graphene. in Journal of Physics: Conference Series. 2010;257.
doi:10.1088/1742-6596/257/1/012011 .

Radović, Ivan, Bibić, Nataša M., Mišković, Zoran L., "Interactions of ions with graphene" in Journal of Physics: Conference Series, 257 (2010),
https://doi.org/10.1088/1742-6596/257/1/012011 . .

TY  - JOUR
AU  - Radović, Ivan
AU  - Borka, Duško
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3969
AB  - We investigate the interactions of fast charged particles with a two-dimensional (2D) electron gas (2DEG) supported by an insulating substrate, describing its collective or plasmon excitations by a one-fluid hydrodynamic model with the parameters characteristic of graphene. By linearizing the hydrodynamic equations, we derive general expressions for the induced potential, stopping force and the image force on a particle moving parallel to the 2DEG, as well as for the induced number density per unit area of electrons in the 2DEG. Numerical results are obtained showing the effects of variation in size of the gap between the 2DEG and the SiO(2) substrate on these quantities. It is also found that, when the particle speed exceeds a threshold value for the collective excitations, the oscillatory wake effect develops in the induced number density trailing the particle. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Physics Letters A
T1  - Interactions of fast charged particles with supported two-dimensional electron gas: One-fluid model
VL  - 374
IS  - 13-14
SP  - 1527
EP  - 1533
DO  - 10.1016/j.physleta.2010.01.056
ER  - 

@article{
author = "Radović, Ivan and Borka, Duško",
year = "2010",
abstract = "We investigate the interactions of fast charged particles with a two-dimensional (2D) electron gas (2DEG) supported by an insulating substrate, describing its collective or plasmon excitations by a one-fluid hydrodynamic model with the parameters characteristic of graphene. By linearizing the hydrodynamic equations, we derive general expressions for the induced potential, stopping force and the image force on a particle moving parallel to the 2DEG, as well as for the induced number density per unit area of electrons in the 2DEG. Numerical results are obtained showing the effects of variation in size of the gap between the 2DEG and the SiO(2) substrate on these quantities. It is also found that, when the particle speed exceeds a threshold value for the collective excitations, the oscillatory wake effect develops in the induced number density trailing the particle. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Physics Letters A",
title = "Interactions of fast charged particles with supported two-dimensional electron gas: One-fluid model",
volume = "374",
number = "13-14",
pages = "1527-1533",
doi = "10.1016/j.physleta.2010.01.056"
}

Radović, I.,& Borka, D.. (2010). Interactions of fast charged particles with supported two-dimensional electron gas: One-fluid model. in Physics Letters A, 374(13-14), 1527-1533.
https://doi.org/10.1016/j.physleta.2010.01.056

Radović I, Borka D. Interactions of fast charged particles with supported two-dimensional electron gas: One-fluid model. in Physics Letters A. 2010;374(13-14):1527-1533.
doi:10.1016/j.physleta.2010.01.056 .

Radović, Ivan, Borka, Duško, "Interactions of fast charged particles with supported two-dimensional electron gas: One-fluid model" in Physics Letters A, 374, no. 13-14 (2010):1527-1533,
https://doi.org/10.1016/j.physleta.2010.01.056 . .

TY  - JOUR
AU  - Radović, Ivan
AU  - Borka, Duško
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4095
AB  - We study the interactions of fast charged particles with a two-dimensional electron gas supported by an insulating substrate, describing its high-frequency plasmon excitations by a two-fluid hydrodynamic model with the parameters characteristic of graphene. The induced number density per unit area of electrons in the two-dimensional electron gas and the total electric potential in its plane are derived as functions of the projectile velocity and the particle position We show that, when the speed of the particle moving parallel to the two-dimensional electron gas exceeds a threshold value for the collective excitations of a and pi electrons, the oscillatory wake effect develops both in the induced number density and in the total electric potential trailing the particle When the particle speed matches the phase velocity of the quasiacoustic pi plasmon, the induced number density shows usual wake oscillations, in contrast to the single-walled carbon nanotubes where oscillations precede the position of the particle (C) 2010 Elsevier B.V All rights reserved
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Wake effect in interactions of fast ions with supported two-dimensional electron gas
VL  - 268
IS  - 17-18
SP  - 2649
EP  - 2654
DO  - 10.1016/j.nimb.2010.06.043
ER  - 

@article{
author = "Radović, Ivan and Borka, Duško",
year = "2010",
abstract = "We study the interactions of fast charged particles with a two-dimensional electron gas supported by an insulating substrate, describing its high-frequency plasmon excitations by a two-fluid hydrodynamic model with the parameters characteristic of graphene. The induced number density per unit area of electrons in the two-dimensional electron gas and the total electric potential in its plane are derived as functions of the projectile velocity and the particle position We show that, when the speed of the particle moving parallel to the two-dimensional electron gas exceeds a threshold value for the collective excitations of a and pi electrons, the oscillatory wake effect develops both in the induced number density and in the total electric potential trailing the particle When the particle speed matches the phase velocity of the quasiacoustic pi plasmon, the induced number density shows usual wake oscillations, in contrast to the single-walled carbon nanotubes where oscillations precede the position of the particle (C) 2010 Elsevier B.V All rights reserved",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Wake effect in interactions of fast ions with supported two-dimensional electron gas",
volume = "268",
number = "17-18",
pages = "2649-2654",
doi = "10.1016/j.nimb.2010.06.043"
}

Radović, I.,& Borka, D.. (2010). Wake effect in interactions of fast ions with supported two-dimensional electron gas. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268(17-18), 2649-2654.
https://doi.org/10.1016/j.nimb.2010.06.043

Radović I, Borka D. Wake effect in interactions of fast ions with supported two-dimensional electron gas. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2010;268(17-18):2649-2654.
doi:10.1016/j.nimb.2010.06.043 .

Radović, Ivan, Borka, Duško, "Wake effect in interactions of fast ions with supported two-dimensional electron gas" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268, no. 17-18 (2010):2649-2654,
https://doi.org/10.1016/j.nimb.2010.06.043 . .

TY  - JOUR
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Bibić, Nataša M.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6886
AB  - The present study deals with CrN/Si bilayers irradiated at room temperature (RI) with 120 keV Ar ions. The CrN layers were deposited by d.c. reactive sputtering on Si(1 0 0) wafers, at different nitrogen partial pressures (2 x 10(-4), 3.5 x 10(-4) and 5 x 10(-4) mbar), to a total thickness of 240-280 nm. The substrates were held at room temperature (RI) or 150 degrees C during deposition. After deposition the CrN/Si bilayers were irradiated up to fluences of 1 x 10(15) and 1 x 10(16) ions/cm(2). Structural characterization was performed with Rutherford backscattering spectroscopy (RBS), cross-sectional transmission electron microscopy (XTEM) and grazing angle X-ray diffraction (XRD). For the highest nitrogen pressure (5 x 10(-4) mbar) a pure stoichiometric CrN phase was achieved. The results showed that Ar ion irradiation resulted in the variation of the lattice constants, micro-strain and mean grain size of the CrN layers. The observed microstructural changes are due to the formation of the high density damage region in the CrN thin film structure. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Ion-beam irradiation effects on reactively sputtered CrN thin films
VL  - 268
IS  - 19
SP  - 2883
EP  - 2887
DO  - 10.1016/j.nimb.2010.03.027
ER  - 

@article{
author = "Novaković, Mirjana M. and Popović, Maja and Bibić, Nataša M.",
year = "2010",
abstract = "The present study deals with CrN/Si bilayers irradiated at room temperature (RI) with 120 keV Ar ions. The CrN layers were deposited by d.c. reactive sputtering on Si(1 0 0) wafers, at different nitrogen partial pressures (2 x 10(-4), 3.5 x 10(-4) and 5 x 10(-4) mbar), to a total thickness of 240-280 nm. The substrates were held at room temperature (RI) or 150 degrees C during deposition. After deposition the CrN/Si bilayers were irradiated up to fluences of 1 x 10(15) and 1 x 10(16) ions/cm(2). Structural characterization was performed with Rutherford backscattering spectroscopy (RBS), cross-sectional transmission electron microscopy (XTEM) and grazing angle X-ray diffraction (XRD). For the highest nitrogen pressure (5 x 10(-4) mbar) a pure stoichiometric CrN phase was achieved. The results showed that Ar ion irradiation resulted in the variation of the lattice constants, micro-strain and mean grain size of the CrN layers. The observed microstructural changes are due to the formation of the high density damage region in the CrN thin film structure. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Ion-beam irradiation effects on reactively sputtered CrN thin films",
volume = "268",
number = "19",
pages = "2883-2887",
doi = "10.1016/j.nimb.2010.03.027"
}

Novaković, M. M., Popović, M.,& Bibić, N. M.. (2010). Ion-beam irradiation effects on reactively sputtered CrN thin films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268(19), 2883-2887.
https://doi.org/10.1016/j.nimb.2010.03.027

Novaković MM, Popović M, Bibić NM. Ion-beam irradiation effects on reactively sputtered CrN thin films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2010;268(19):2883-2887.
doi:10.1016/j.nimb.2010.03.027 .

Novaković, Mirjana M., Popović, Maja, Bibić, Nataša M., "Ion-beam irradiation effects on reactively sputtered CrN thin films" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 268, no. 19 (2010):2883-2887,
https://doi.org/10.1016/j.nimb.2010.03.027 . .

TY  - JOUR
AU  - Tomić, Simonida Lj.
AU  - Mićić, Maja M.
AU  - Dobić, Sava N.
AU  - Filipović, Jovanka M.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3961
AB  - pH- and temperature-sensitive hydrogels, based on 2-hydroxyethyl methacrylate (HEMA) and itaconic acid (IA) copolymers, were prepared by gamma-irradiation and characterized in order to examine their potential use in biomedical applications. The influence of comonomer ratio in these smart copolymers on their morphology, mechanical and thermal properties, biocompatibility and microbe penetration capability was investigated. The mechanical properties of copolymers were investigated using the dynamic mechanical analysis (DMA), while their thermal properties and morphology were examined by thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The morphology, mechanical and thermal properties of these hydrogels were found to be suitable for most requirements of biomedical applications. The in vitro study of P(HEMA/IA) biocompatibility showed no evidence of cell toxicity nor any considerable hemolytic activity. Furthermore, the microbe penetration test showed that neither Staphylococcus aureus nor Escherichia coli passed through the hydogel dressing; thus the P(HEMA/IA) dressing could be considered a good barrier against microbes. All results indicate that stimuli-responsive P(HEMA/IA) hydrogels have great potential for biomedical applications, especially for skin treatment and wound dressings. (C) 2009 Elsevier Ltd. All rights reserved.
T2  - Radiation Physics and Chemistry
T1  - Smart poly(2-hydroxyethyl methacrylate/itaconic acid) hydrogels for biomedical application
VL  - 79
IS  - 5
SP  - 643
EP  - 649
DO  - 10.1016/j.radphyschem.2009.11.015
ER  - 

@article{
author = "Tomić, Simonida Lj. and Mićić, Maja M. and Dobić, Sava N. and Filipović, Jovanka M. and Suljovrujić, Edin H.",
year = "2010",
abstract = "pH- and temperature-sensitive hydrogels, based on 2-hydroxyethyl methacrylate (HEMA) and itaconic acid (IA) copolymers, were prepared by gamma-irradiation and characterized in order to examine their potential use in biomedical applications. The influence of comonomer ratio in these smart copolymers on their morphology, mechanical and thermal properties, biocompatibility and microbe penetration capability was investigated. The mechanical properties of copolymers were investigated using the dynamic mechanical analysis (DMA), while their thermal properties and morphology were examined by thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The morphology, mechanical and thermal properties of these hydrogels were found to be suitable for most requirements of biomedical applications. The in vitro study of P(HEMA/IA) biocompatibility showed no evidence of cell toxicity nor any considerable hemolytic activity. Furthermore, the microbe penetration test showed that neither Staphylococcus aureus nor Escherichia coli passed through the hydogel dressing; thus the P(HEMA/IA) dressing could be considered a good barrier against microbes. All results indicate that stimuli-responsive P(HEMA/IA) hydrogels have great potential for biomedical applications, especially for skin treatment and wound dressings. (C) 2009 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Smart poly(2-hydroxyethyl methacrylate/itaconic acid) hydrogels for biomedical application",
volume = "79",
number = "5",
pages = "643-649",
doi = "10.1016/j.radphyschem.2009.11.015"
}

Tomić, S. Lj., Mićić, M. M., Dobić, S. N., Filipović, J. M.,& Suljovrujić, E. H.. (2010). Smart poly(2-hydroxyethyl methacrylate/itaconic acid) hydrogels for biomedical application. in Radiation Physics and Chemistry, 79(5), 643-649.
https://doi.org/10.1016/j.radphyschem.2009.11.015

Tomić SL, Mićić MM, Dobić SN, Filipović JM, Suljovrujić EH. Smart poly(2-hydroxyethyl methacrylate/itaconic acid) hydrogels for biomedical application. in Radiation Physics and Chemistry. 2010;79(5):643-649.
doi:10.1016/j.radphyschem.2009.11.015 .

Tomić, Simonida Lj., Mićić, Maja M., Dobić, Sava N., Filipović, Jovanka M., Suljovrujić, Edin H., "Smart poly(2-hydroxyethyl methacrylate/itaconic acid) hydrogels for biomedical application" in Radiation Physics and Chemistry, 79, no. 5 (2010):643-649,
https://doi.org/10.1016/j.radphyschem.2009.11.015 . .

TY  - JOUR
AU  - Tomić, Simonida Lj.
AU  - Mićić, Maja M.
AU  - Filipović, Jovanka M.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4026
AB  - In this work, novel hydrogels based on 2-hydroxyethyl methacrylate (HEMA) and different poly(alkylene glycol)(meth)acrylates (BIS) were prepared by radiation-induced copolymerization. The influence of different BIS types with variation in chain length, based on ethylene glycol (EG) and/or propylene glycol (PG) pendant units, on the nature and inherent properties of P(HEMA/BIS) copolymeric hydrogels was the main idea of this paper. Swelling studies were conducted for all types of P(HEMA/BIS) copolymeric hydrogels in a wide pH and temperature range. Additional characterization of structure, morphology and thermal behaviour of the obtained hydrogels was conducted by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric (TG) analysis. The modelling of drug release and diffusion characteristics was tested using cephalexin (CEX). The results indicate that P(HEMA/BIS) hydrogels properties are significantly dependent on the type of BIS. The hydrogels with ethylene glycol (EG) pendant chains show a noticeable pH and/or temperature sensitivity and can be considered smart hydrogels. The introduction of propylene glycol (PG) units, pure and mixed with ethylene glycol (EG) pendant chains, can additionally tune the characteristics of such gels. Furthermore, drug release studies indicate that these types of P(HEMA/BIS) copolymeric hydrogels are suitable candidates for controlled drug release systems. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Synthesis, characterization and controlled release of cephalexin drug from smart poly(2-hydroxyethyl methacrylate/poly(alkylene glycol)(meth)acrylates hydrogels
VL  - 160
IS  - 2
SP  - 801
EP  - 809
DO  - 10.1016/j.cej.2010.03.089
ER  - 

@article{
author = "Tomić, Simonida Lj. and Mićić, Maja M. and Filipović, Jovanka M. and Suljovrujić, Edin H.",
year = "2010",
abstract = "In this work, novel hydrogels based on 2-hydroxyethyl methacrylate (HEMA) and different poly(alkylene glycol)(meth)acrylates (BIS) were prepared by radiation-induced copolymerization. The influence of different BIS types with variation in chain length, based on ethylene glycol (EG) and/or propylene glycol (PG) pendant units, on the nature and inherent properties of P(HEMA/BIS) copolymeric hydrogels was the main idea of this paper. Swelling studies were conducted for all types of P(HEMA/BIS) copolymeric hydrogels in a wide pH and temperature range. Additional characterization of structure, morphology and thermal behaviour of the obtained hydrogels was conducted by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric (TG) analysis. The modelling of drug release and diffusion characteristics was tested using cephalexin (CEX). The results indicate that P(HEMA/BIS) hydrogels properties are significantly dependent on the type of BIS. The hydrogels with ethylene glycol (EG) pendant chains show a noticeable pH and/or temperature sensitivity and can be considered smart hydrogels. The introduction of propylene glycol (PG) units, pure and mixed with ethylene glycol (EG) pendant chains, can additionally tune the characteristics of such gels. Furthermore, drug release studies indicate that these types of P(HEMA/BIS) copolymeric hydrogels are suitable candidates for controlled drug release systems. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Synthesis, characterization and controlled release of cephalexin drug from smart poly(2-hydroxyethyl methacrylate/poly(alkylene glycol)(meth)acrylates hydrogels",
volume = "160",
number = "2",
pages = "801-809",
doi = "10.1016/j.cej.2010.03.089"
}

Tomić, S. Lj., Mićić, M. M., Filipović, J. M.,& Suljovrujić, E. H.. (2010). Synthesis, characterization and controlled release of cephalexin drug from smart poly(2-hydroxyethyl methacrylate/poly(alkylene glycol)(meth)acrylates hydrogels. in Chemical Engineering Journal, 160(2), 801-809.
https://doi.org/10.1016/j.cej.2010.03.089

Tomić SL, Mićić MM, Filipović JM, Suljovrujić EH. Synthesis, characterization and controlled release of cephalexin drug from smart poly(2-hydroxyethyl methacrylate/poly(alkylene glycol)(meth)acrylates hydrogels. in Chemical Engineering Journal. 2010;160(2):801-809.
doi:10.1016/j.cej.2010.03.089 .

Tomić, Simonida Lj., Mićić, Maja M., Filipović, Jovanka M., Suljovrujić, Edin H., "Synthesis, characterization and controlled release of cephalexin drug from smart poly(2-hydroxyethyl methacrylate/poly(alkylene glycol)(meth)acrylates hydrogels" in Chemical Engineering Journal, 160, no. 2 (2010):801-809,
https://doi.org/10.1016/j.cej.2010.03.089 . .

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  - Miličević, Dejan S.
AU  - Trifunovic, Sasa B.
AU  - Mudrinic, Tihana M.
AU  - Leskovac, Andreja
AU  - Ignjatović, Nenad L.
AU  - Dojčilović, Jablan R.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4121
AB  - The influence of gamma radiation on the structure and glass transition behaviour of poly-L-lactide (PLLA) has been studied. Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by the gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC). The apparent activation energy, Delta H*, for the glass transition was determined on the basis of the heating rate dependence of the glass transition temperature, T(g). Our findings support the fact that chain scission is the main reason for the decrease of Tg and Delta H* with the absorbed dose. At low doses, despite large changes in molecular weight, only small alterations are observed in the glass transition temperature and apparent activation energy. Further increase in the absorbed dose introduces not only significant changes in the molecular weight but also in the glass transition temperature and the activation energy. Such glass transition behaviour is a manifestation of a well-known effect of molecular weight on Tg, postulated by the Fox-Flory equation. However, all the observed alterations are small and tolerable at absorbed doses required for sterilization (up to 25 kGy in most circumstances). Furthermore, this study reveals that the radiation-induced changes in the molecular weight and the glass transition temperature occur in a predictable and fairly accurate manner. Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of PLLA based implants.
T2  - Hemijska industrija
T1  - The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation
VL  - 64
IS  - 4
SP  - 275
EP  - 281
DO  - 10.2298/HEMIND100329020M
ER  - 

@article{
author = "Miličević, Dejan S. and Trifunovic, Sasa B. and Mudrinic, Tihana M. and Leskovac, Andreja and Ignjatović, Nenad L. and Dojčilović, Jablan R. and Suljovrujić, Edin H.",
year = "2010",
abstract = "The influence of gamma radiation on the structure and glass transition behaviour of poly-L-lactide (PLLA) has been studied. Since PLLA exposed to high-energy radiation in the presence of air is prone to chain scission reactions and large degradation, changes in molecular weight were obtained by the gel permeation chromatography (GPC). Alterations in the glass transition behaviour were investigated by differential scanning calorimetry (DSC). The apparent activation energy, Delta H*, for the glass transition was determined on the basis of the heating rate dependence of the glass transition temperature, T(g). Our findings support the fact that chain scission is the main reason for the decrease of Tg and Delta H* with the absorbed dose. At low doses, despite large changes in molecular weight, only small alterations are observed in the glass transition temperature and apparent activation energy. Further increase in the absorbed dose introduces not only significant changes in the molecular weight but also in the glass transition temperature and the activation energy. Such glass transition behaviour is a manifestation of a well-known effect of molecular weight on Tg, postulated by the Fox-Flory equation. However, all the observed alterations are small and tolerable at absorbed doses required for sterilization (up to 25 kGy in most circumstances). Furthermore, this study reveals that the radiation-induced changes in the molecular weight and the glass transition temperature occur in a predictable and fairly accurate manner. Therefore, gamma radiation can be used not only for sterilization but also for tailoring desirable end-use properties of PLLA based implants.",
journal = "Hemijska industrija",
title = "The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation",
volume = "64",
number = "4",
pages = "275-281",
doi = "10.2298/HEMIND100329020M"
}

Miličević, D. S., Trifunovic, S. B., Mudrinic, T. M., Leskovac, A., Ignjatović, N. L., Dojčilović, J. R.,& Suljovrujić, E. H.. (2010). The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation. in Hemijska industrija, 64(4), 275-281.
https://doi.org/10.2298/HEMIND100329020M

Miličević DS, Trifunovic SB, Mudrinic TM, Leskovac A, Ignjatović NL, Dojčilović JR, Suljovrujić EH. The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation. in Hemijska industrija. 2010;64(4):275-281.
doi:10.2298/HEMIND100329020M .

Miličević, Dejan S., Trifunovic, Sasa B., Mudrinic, Tihana M., Leskovac, Andreja, Ignjatović, Nenad L., Dojčilović, Jablan R., Suljovrujić, Edin H., "The Structure and Glass Transition Behaviour of Plla under the Influence of Gamma Radiation" in Hemijska industrija, 64, no. 4 (2010):275-281,
https://doi.org/10.2298/HEMIND100329020M . .

TY  - JOUR
AU  - Miličević, Dejan S.
AU  - Suljovrujić, Edin H.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4051
AB  - In this paper, changes in structure and physical properties of stabilized isotactic polypropylene (iPP) were created by gamma irradiation, up to a dose of 700 kGy, in different media: air, deionized distilled (DD) water and acetylene. Two main effects occur when polyolefins, such as iPP, are subjected to ionizing radiation: crosslinking and scission of macromolecules. The domination of one or the other of these competitive processes is determined by both the structural peculiarities of the polymers and the experimental irradiation conditions. Gel and infrared (IR) spectroscopy measurements were used to determine the changes in the degree of network formation and oxidative degradation, respectively. Sol gel analysis was studied in detail using the Charlesby-Pinner (C-P) equation. The radiation-induced changes in the structure and evolution of oxygen-containing species were also studied through dielectric loss (tan delta) analysis in a wide temperature and/or frequency range. Evolution of low temperature dielectric relaxations with gamma irradiation was investigated. The results showed that degradation was the major reaction in the initial step of irradiation, no matter what the atmosphere was. The C-P equation seemed applicable when stabilized iPP was irradiated within a certain dose range in various atmospheres. The iPP irradiated in acetylene/air had the lowest/highest values for oxidation level, dielectric losses, D(g) and G(s)/G(x) values. The calculated D(g) values are 1.5 and 5 times larger for the irradiation in DD water and air than for the acetylene. Furthermore, our data confirm that oxidation strongly affects the gel point but has a much lower effect on the G(s)/G(x) ratio. In the case of dielectric relaxation measurements, the connection between the oxidative degradation and dielectric properties is well established and is in good agreement with IR spectroscopy measurements. The amount of carbonyl, hydroperoxide and other polar groups is much higher for the irradiation in air than in other media, leading to higher dielectric losses. Disappearance of low temperature (delta and gamma) relaxations with gamma radiation confirmed great sensitivity of iPP structure to radiation-induced changes. Complete vanishing of the gamma relaxation in iPP samples irradiated in air is connected with a large radiation-induced oxidative degradation in this medium. Similar crosslinking, oxidation and dielectric behaviour was observed for the samples irradiated in water and acetylene, indicating DD water as a good crosslinking medium.
T2  - Hemijska industrija
T1  - Properties of Isotactic Polypropylene Irradiated in Various Atmospheres
VL  - 64
IS  - 3
SP  - 201
EP  - 208
DO  - 10.2298/HEMIND091221029M
ER  - 

@article{
author = "Miličević, Dejan S. and Suljovrujić, Edin H.",
year = "2010",
abstract = "In this paper, changes in structure and physical properties of stabilized isotactic polypropylene (iPP) were created by gamma irradiation, up to a dose of 700 kGy, in different media: air, deionized distilled (DD) water and acetylene. Two main effects occur when polyolefins, such as iPP, are subjected to ionizing radiation: crosslinking and scission of macromolecules. The domination of one or the other of these competitive processes is determined by both the structural peculiarities of the polymers and the experimental irradiation conditions. Gel and infrared (IR) spectroscopy measurements were used to determine the changes in the degree of network formation and oxidative degradation, respectively. Sol gel analysis was studied in detail using the Charlesby-Pinner (C-P) equation. The radiation-induced changes in the structure and evolution of oxygen-containing species were also studied through dielectric loss (tan delta) analysis in a wide temperature and/or frequency range. Evolution of low temperature dielectric relaxations with gamma irradiation was investigated. The results showed that degradation was the major reaction in the initial step of irradiation, no matter what the atmosphere was. The C-P equation seemed applicable when stabilized iPP was irradiated within a certain dose range in various atmospheres. The iPP irradiated in acetylene/air had the lowest/highest values for oxidation level, dielectric losses, D(g) and G(s)/G(x) values. The calculated D(g) values are 1.5 and 5 times larger for the irradiation in DD water and air than for the acetylene. Furthermore, our data confirm that oxidation strongly affects the gel point but has a much lower effect on the G(s)/G(x) ratio. In the case of dielectric relaxation measurements, the connection between the oxidative degradation and dielectric properties is well established and is in good agreement with IR spectroscopy measurements. The amount of carbonyl, hydroperoxide and other polar groups is much higher for the irradiation in air than in other media, leading to higher dielectric losses. Disappearance of low temperature (delta and gamma) relaxations with gamma radiation confirmed great sensitivity of iPP structure to radiation-induced changes. Complete vanishing of the gamma relaxation in iPP samples irradiated in air is connected with a large radiation-induced oxidative degradation in this medium. Similar crosslinking, oxidation and dielectric behaviour was observed for the samples irradiated in water and acetylene, indicating DD water as a good crosslinking medium.",
journal = "Hemijska industrija",
title = "Properties of Isotactic Polypropylene Irradiated in Various Atmospheres",
volume = "64",
number = "3",
pages = "201-208",
doi = "10.2298/HEMIND091221029M"
}

Miličević, D. S.,& Suljovrujić, E. H.. (2010). Properties of Isotactic Polypropylene Irradiated in Various Atmospheres. in Hemijska industrija, 64(3), 201-208.
https://doi.org/10.2298/HEMIND091221029M

Miličević DS, Suljovrujić EH. Properties of Isotactic Polypropylene Irradiated in Various Atmospheres. in Hemijska industrija. 2010;64(3):201-208.
doi:10.2298/HEMIND091221029M .

Miličević, Dejan S., Suljovrujić, Edin H., "Properties of Isotactic Polypropylene Irradiated in Various Atmospheres" in Hemijska industrija, 64, no. 3 (2010):201-208,
https://doi.org/10.2298/HEMIND091221029M . .

TY  - JOUR
AU  - Radović, Ivan
AU  - Hadžievski, Ljupčo
AU  - Bibić, Nataša M.
AU  - Mišković, Zoran L.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6852
AB  - In this work, we study the interactions of fast ions with graphene describing the excitations of the electron gas in graphene by a two-dimensional (2D) hydrodynamic model (one-fluid and two-fluid model). The two-fluid model reproduces qualitatively the split of plasmon dispersions into the low-frequency pi-electron branch and the high-frequency sigma+pi-electron branch. We calculate the stopping force and the image force on an ion moving parallel to a single sheet of graphene. Numerical results show that the presence of the low-energy, quasiacoustic plasmon in the two-fluid model gives rise to resonant features at low velocities around its acoustic speed, which are not seen in the one-fluid model. The two models give virtually indistinguishable results for both forces at high speeds. Marked differences between the two models in the values of image forces at low speeds can be seen. Numerical results show that the magnitudes of both the stopping and image forces exhibit typical resonance-shaped velocity dependencies, with the peak positions moving to higher velocities for higher distances and with the overall magnitudes decreasing sharply with increasing distances. The second order corrections are found to be small, as expected for fast ions outside the electron gas, but their relative magnitudes should be easily discernible in experiments on ion grazing scattering from graphene. One notices effects which are similar to those obtained earlier for proton channeling in carbon nanotubes.
T2  - Hemijska industrija
T1  - Interactions of Fast Ions with Graphene
VL  - 63
IS  - 3
SP  - 151
EP  - 157
DO  - 10.2298/HEMIND0903151R
ER  - 

@article{
author = "Radović, Ivan and Hadžievski, Ljupčo and Bibić, Nataša M. and Mišković, Zoran L.",
year = "2009",
abstract = "In this work, we study the interactions of fast ions with graphene describing the excitations of the electron gas in graphene by a two-dimensional (2D) hydrodynamic model (one-fluid and two-fluid model). The two-fluid model reproduces qualitatively the split of plasmon dispersions into the low-frequency pi-electron branch and the high-frequency sigma+pi-electron branch. We calculate the stopping force and the image force on an ion moving parallel to a single sheet of graphene. Numerical results show that the presence of the low-energy, quasiacoustic plasmon in the two-fluid model gives rise to resonant features at low velocities around its acoustic speed, which are not seen in the one-fluid model. The two models give virtually indistinguishable results for both forces at high speeds. Marked differences between the two models in the values of image forces at low speeds can be seen. Numerical results show that the magnitudes of both the stopping and image forces exhibit typical resonance-shaped velocity dependencies, with the peak positions moving to higher velocities for higher distances and with the overall magnitudes decreasing sharply with increasing distances. The second order corrections are found to be small, as expected for fast ions outside the electron gas, but their relative magnitudes should be easily discernible in experiments on ion grazing scattering from graphene. One notices effects which are similar to those obtained earlier for proton channeling in carbon nanotubes.",
journal = "Hemijska industrija",
title = "Interactions of Fast Ions with Graphene",
volume = "63",
number = "3",
pages = "151-157",
doi = "10.2298/HEMIND0903151R"
}

Radović, I., Hadžievski, L., Bibić, N. M.,& Mišković, Z. L.. (2009). Interactions of Fast Ions with Graphene. in Hemijska industrija, 63(3), 151-157.
https://doi.org/10.2298/HEMIND0903151R

Radović I, Hadžievski L, Bibić NM, Mišković ZL. Interactions of Fast Ions with Graphene. in Hemijska industrija. 2009;63(3):151-157.
doi:10.2298/HEMIND0903151R .

Radović, Ivan, Hadžievski, Ljupčo, Bibić, Nataša M., Mišković, Zoran L., "Interactions of Fast Ions with Graphene" in Hemijska industrija, 63, no. 3 (2009):151-157,
https://doi.org/10.2298/HEMIND0903151R . .

TY  - JOUR
AU  - Radović, Ivan
AU  - Hadžievski, Ljupčo
AU  - Bibić, Nataša M.
AU  - Mišković, Zoran L.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3825
AB  - We study the interactions of fast charged particles with a two-dimensional electron gas describing its collective or plasmon excitations by a hydrodynamic model with the parameters characteristic of graphene. We solve the sets of first and second order equations in a perturbational treatment of the hydrodynamic model, and obtain numerical results for the stopping force and the image force on a particle moving parallel to the electron gas. Although the second order effects in these forces are relatively small, they could be observed in experiments on grazing scattering of, e.g., fast protons and antiprotons from the surface of graphene. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Non-linear effects in the forces acting on fast charged particles passing over two-dimensional electron gas
VL  - 118
IS  - 2-3
SP  - 293
EP  - 297
DO  - 10.1016/j.matchemphys.2009.07.059
ER  - 

@article{
author = "Radović, Ivan and Hadžievski, Ljupčo and Bibić, Nataša M. and Mišković, Zoran L.",
year = "2009",
abstract = "We study the interactions of fast charged particles with a two-dimensional electron gas describing its collective or plasmon excitations by a hydrodynamic model with the parameters characteristic of graphene. We solve the sets of first and second order equations in a perturbational treatment of the hydrodynamic model, and obtain numerical results for the stopping force and the image force on a particle moving parallel to the electron gas. Although the second order effects in these forces are relatively small, they could be observed in experiments on grazing scattering of, e.g., fast protons and antiprotons from the surface of graphene. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Non-linear effects in the forces acting on fast charged particles passing over two-dimensional electron gas",
volume = "118",
number = "2-3",
pages = "293-297",
doi = "10.1016/j.matchemphys.2009.07.059"
}

Radović, I., Hadžievski, L., Bibić, N. M.,& Mišković, Z. L.. (2009). Non-linear effects in the forces acting on fast charged particles passing over two-dimensional electron gas. in Materials Chemistry and Physics, 118(2-3), 293-297.
https://doi.org/10.1016/j.matchemphys.2009.07.059

Radović I, Hadžievski L, Bibić NM, Mišković ZL. Non-linear effects in the forces acting on fast charged particles passing over two-dimensional electron gas. in Materials Chemistry and Physics. 2009;118(2-3):293-297.
doi:10.1016/j.matchemphys.2009.07.059 .

Radović, Ivan, Hadžievski, Ljupčo, Bibić, Nataša M., Mišković, Zoran L., "Non-linear effects in the forces acting on fast charged particles passing over two-dimensional electron gas" in Materials Chemistry and Physics, 118, no. 2-3 (2009):293-297,
https://doi.org/10.1016/j.matchemphys.2009.07.059 . .

TY  - JOUR
AU  - Tomić, Simonida Lj.
AU  - Mićić, Maja M.
AU  - Krezović, Bojana D.
AU  - Dobić, Sava N.
AU  - Suljovrujić, Edin H.
AU  - Filipović, Jovanka M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3967
AB  - pH and temperature sensitive hydrogels, based on 2-hydroxyethyl methacrylate (HEMA) and itaconic acid (IA) copolymers, were prepared by gamma irradiation and characterized in order to examine their potential use in biomedical applications. The influence of comonomer ratio in these smart copolymers on their morphology, mechanical properties, biocompatibility and microbe penetration capability was investigated. The mechanical properties of copolymers were investigated using the dynamic mechanical analysis (DMA), while their morphology was examined by scanning electron microscopy (SEM). The morphology and mechanical properties of these hydrogels were found to be suitable for most requirements of biomedical applications. The in vitro study of P(HEMA/IA) biocompatibility showed no evidence of cell toxicity nor any considerable hemolytic activity. Furthermore, the microbe penetration test showed that neither Staphylococcus aureus nor Escherichia coli passed through the hydogel dressing; thus the P(HEMA/IA) dressing could be considered a good barrier against microbes. All results indicate that stimuli-responsive P(HEMA/IA) hydrogels have great potential for biomedical applications, especially for skin treatment and wound dressings.
T2  - Hemijska industrija
T1  - Smart Hydrogels Based on Itaconic Acid for Biomedical Application
VL  - 63
IS  - 6
SP  - 603
EP  - 610
DO  - 10.2298/HEMIND0906603T
ER  - 

@article{
author = "Tomić, Simonida Lj. and Mićić, Maja M. and Krezović, Bojana D. and Dobić, Sava N. and Suljovrujić, Edin H. and Filipović, Jovanka M.",
year = "2009",
abstract = "pH and temperature sensitive hydrogels, based on 2-hydroxyethyl methacrylate (HEMA) and itaconic acid (IA) copolymers, were prepared by gamma irradiation and characterized in order to examine their potential use in biomedical applications. The influence of comonomer ratio in these smart copolymers on their morphology, mechanical properties, biocompatibility and microbe penetration capability was investigated. The mechanical properties of copolymers were investigated using the dynamic mechanical analysis (DMA), while their morphology was examined by scanning electron microscopy (SEM). The morphology and mechanical properties of these hydrogels were found to be suitable for most requirements of biomedical applications. The in vitro study of P(HEMA/IA) biocompatibility showed no evidence of cell toxicity nor any considerable hemolytic activity. Furthermore, the microbe penetration test showed that neither Staphylococcus aureus nor Escherichia coli passed through the hydogel dressing; thus the P(HEMA/IA) dressing could be considered a good barrier against microbes. All results indicate that stimuli-responsive P(HEMA/IA) hydrogels have great potential for biomedical applications, especially for skin treatment and wound dressings.",
journal = "Hemijska industrija",
title = "Smart Hydrogels Based on Itaconic Acid for Biomedical Application",
volume = "63",
number = "6",
pages = "603-610",
doi = "10.2298/HEMIND0906603T"
}

Tomić, S. Lj., Mićić, M. M., Krezović, B. D., Dobić, S. N., Suljovrujić, E. H.,& Filipović, J. M.. (2009). Smart Hydrogels Based on Itaconic Acid for Biomedical Application. in Hemijska industrija, 63(6), 603-610.
https://doi.org/10.2298/HEMIND0906603T

Tomić SL, Mićić MM, Krezović BD, Dobić SN, Suljovrujić EH, Filipović JM. Smart Hydrogels Based on Itaconic Acid for Biomedical Application. in Hemijska industrija. 2009;63(6):603-610.
doi:10.2298/HEMIND0906603T .

Tomić, Simonida Lj., Mićić, Maja M., Krezović, Bojana D., Dobić, Sava N., Suljovrujić, Edin H., Filipović, Jovanka M., "Smart Hydrogels Based on Itaconic Acid for Biomedical Application" in Hemijska industrija, 63, no. 6 (2009):603-610,
https://doi.org/10.2298/HEMIND0906603T . .

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  - Popović, Maja
AU  - Stojanović, Milan
AU  - Peruško, Davor
AU  - Novaković, Mirjana M.
AU  - Radović, Ivan
AU  - Milinović, Velimir
AU  - Timotijević, B.
AU  - Mitrić, Miodrag
AU  - Milosavljević, Momir
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6769
AB  - A study of ion beam modification of structural and electrical properties of TiN thin films is presented. The layers were deposited by reactive ion sputtering on (100) Si and glass slide substrates to a thickness of similar to 240 nm. After deposition the structures were implanted with argon ions at 120 keV, to the fluences from 1 x 10(15) to 1 x 10(16) ions/cm(2). The ion energy was chosen to give the projected ion range within the deposited layers, to minimize the influence of the substrate on the induced structural changes. Structural analysis of the samples was performed by cross-sectional transmission electron microscopy, X-ray diffraction and Rutherford backscattering spectrometry. Electrical characterization included sheet resistivity measurements with a four point probe. It was found that the as-deposited layers have columnar structure, individual columns stretching from the substrate to the surface and being a few tens of nanometers wide.Ion irradiation rearranges their crystalline structure, which remains polycrystalline, but the columns are broken, and nanocrystals of the same phase are formed. The structural changes can be nicely correlated to the measured electrical resistivity. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Ion beam modification of structural and electrical properties of TiN thin films
VL  - 266
IS  - 10
SP  - 2507
EP  - 2510
DO  - 10.1016/j.nimb.2008.03.032
ER  - 

@article{
author = "Popović, Maja and Stojanović, Milan and Peruško, Davor and Novaković, Mirjana M. and Radović, Ivan and Milinović, Velimir and Timotijević, B. and Mitrić, Miodrag and Milosavljević, Momir",
year = "2008",
abstract = "A study of ion beam modification of structural and electrical properties of TiN thin films is presented. The layers were deposited by reactive ion sputtering on (100) Si and glass slide substrates to a thickness of similar to 240 nm. After deposition the structures were implanted with argon ions at 120 keV, to the fluences from 1 x 10(15) to 1 x 10(16) ions/cm(2). The ion energy was chosen to give the projected ion range within the deposited layers, to minimize the influence of the substrate on the induced structural changes. Structural analysis of the samples was performed by cross-sectional transmission electron microscopy, X-ray diffraction and Rutherford backscattering spectrometry. Electrical characterization included sheet resistivity measurements with a four point probe. It was found that the as-deposited layers have columnar structure, individual columns stretching from the substrate to the surface and being a few tens of nanometers wide.Ion irradiation rearranges their crystalline structure, which remains polycrystalline, but the columns are broken, and nanocrystals of the same phase are formed. The structural changes can be nicely correlated to the measured electrical resistivity. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Ion beam modification of structural and electrical properties of TiN thin films",
volume = "266",
number = "10",
pages = "2507-2510",
doi = "10.1016/j.nimb.2008.03.032"
}

Popović, M., Stojanović, M., Peruško, D., Novaković, M. M., Radović, I., Milinović, V., Timotijević, B., Mitrić, M.,& Milosavljević, M.. (2008). Ion beam modification of structural and electrical properties of TiN thin films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 266(10), 2507-2510.
https://doi.org/10.1016/j.nimb.2008.03.032

Popović M, Stojanović M, Peruško D, Novaković MM, Radović I, Milinović V, Timotijević B, Mitrić M, Milosavljević M. Ion beam modification of structural and electrical properties of TiN thin films. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2008;266(10):2507-2510.
doi:10.1016/j.nimb.2008.03.032 .

Popović, Maja, Stojanović, Milan, Peruško, Davor, Novaković, Mirjana M., Radović, Ivan, Milinović, Velimir, Timotijević, B., Mitrić, Miodrag, Milosavljević, Momir, "Ion beam modification of structural and electrical properties of TiN thin films" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 266, no. 10 (2008):2507-2510,
https://doi.org/10.1016/j.nimb.2008.03.032 . .

TY  - CONF
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Milosavljević, Momir
AU  - Peruško, Davor
AU  - Milinović, Velimir
AU  - Radović, Ivan
AU  - Bibić, Nataša M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6827
AB  - This paper presents a study of the structure and composition of Cr-N thin films as a function of deposition parameters and ion irradiation. Thin films were deposited by reactive ion sputtering on (100) Si substrates, to a thickness of 240-280 nm, at different nitrogen partial pressures. After deposition the samples were irradiated with 120 keV argon ions, to the fluences of 1 x 10(15) and 1 x 10(16) ions/cm(2). Structural characterization of the samples was performed by Rutherford backscattering spectrometry, x-ray diffraction and cross-sectional transmission electron microscopy. It was found that the film composition, Cr2N or CrN, strongly depends on the nitrogen partial pressure during deposition. Ion irradiation induces local microstructural changes, formation of nanoparticles mid defects.
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Microstructural Changes of Chromium-Nitride Thin Films Induced By Argon Ion Implantation
IS  - 84
SP  - 201
EP  - 204
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6827
ER  - 

@conference{
author = "Novaković, Mirjana M. and Popović, Maja and Milosavljević, Momir and Peruško, Davor and Milinović, Velimir and Radović, Ivan and Bibić, Nataša M.",
year = "2008",
abstract = "This paper presents a study of the structure and composition of Cr-N thin films as a function of deposition parameters and ion irradiation. Thin films were deposited by reactive ion sputtering on (100) Si substrates, to a thickness of 240-280 nm, at different nitrogen partial pressures. After deposition the samples were irradiated with 120 keV argon ions, to the fluences of 1 x 10(15) and 1 x 10(16) ions/cm(2). Structural characterization of the samples was performed by Rutherford backscattering spectrometry, x-ray diffraction and cross-sectional transmission electron microscopy. It was found that the film composition, Cr2N or CrN, strongly depends on the nitrogen partial pressure during deposition. Ion irradiation induces local microstructural changes, formation of nanoparticles mid defects.",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Microstructural Changes of Chromium-Nitride Thin Films Induced By Argon Ion Implantation",
number = "84",
pages = "201-204",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6827"
}

Novaković, M. M., Popović, M., Milosavljević, M., Peruško, D., Milinović, V., Radović, I.,& Bibić, N. M.. (2008). Microstructural Changes of Chromium-Nitride Thin Films Induced By Argon Ion Implantation. in Publications of the Astronomical Observatory of Belgrade(84), 201-204.
https://hdl.handle.net/21.15107/rcub_vinar_6827

Novaković MM, Popović M, Milosavljević M, Peruško D, Milinović V, Radović I, Bibić NM. Microstructural Changes of Chromium-Nitride Thin Films Induced By Argon Ion Implantation. in Publications of the Astronomical Observatory of Belgrade. 2008;(84):201-204.
https://hdl.handle.net/21.15107/rcub_vinar_6827 .

Novaković, Mirjana M., Popović, Maja, Milosavljević, Momir, Peruško, Davor, Milinović, Velimir, Radović, Ivan, Bibić, Nataša M., "Microstructural Changes of Chromium-Nitride Thin Films Induced By Argon Ion Implantation" in Publications of the Astronomical Observatory of Belgrade, no. 84 (2008):201-204,
https://hdl.handle.net/21.15107/rcub_vinar_6827 .

TY  - CONF
AU  - Popović, Maja
AU  - Novaković, Mirjana
AU  - Milosavljević, Momir
AU  - Peruško, Davor
AU  - Milinović, Velimir
AU  - Radović, Ivan
AU  - Bibić, Nataša M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6828
AB  - A study of ion beam modification of structural and electrical properties of TiN thin films is presented. The layers, were deposited by reactive ion sputtering on (100) Si substrates to a thickness of similar to 240 nm. After deposition the structures were implanted with argon ions at 120 keV, to the fluences from 1 x 10(15) - 1 x 10(16) ions/cm(2). Structural analysis of the samples was performed by cross-sectional transmission electron microscopy, x-ray diffraction and Rutherford backscattering spectrometry. It was found that the as-deposited layers have a columnar structure, individual columns stretching from the substrate to the surface and being a few tells of nanometers wide. Ion irradiation rearranges their crystalline structure, which remains polycrystalline, but the columns are broken, and nanocrystals of the same phase are formed.
C3  - Publications of the Astronomical Observatory of Belgrade
T1  - Ion Beam Modification of Reactively Sputtered TiN Thin Films
IS  - 84
SP  - 205
EP  - 208
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6828
ER  - 

@conference{
author = "Popović, Maja and Novaković, Mirjana and Milosavljević, Momir and Peruško, Davor and Milinović, Velimir and Radović, Ivan and Bibić, Nataša M.",
year = "2008",
abstract = "A study of ion beam modification of structural and electrical properties of TiN thin films is presented. The layers, were deposited by reactive ion sputtering on (100) Si substrates to a thickness of similar to 240 nm. After deposition the structures were implanted with argon ions at 120 keV, to the fluences from 1 x 10(15) - 1 x 10(16) ions/cm(2). Structural analysis of the samples was performed by cross-sectional transmission electron microscopy, x-ray diffraction and Rutherford backscattering spectrometry. It was found that the as-deposited layers have a columnar structure, individual columns stretching from the substrate to the surface and being a few tells of nanometers wide. Ion irradiation rearranges their crystalline structure, which remains polycrystalline, but the columns are broken, and nanocrystals of the same phase are formed.",
journal = "Publications of the Astronomical Observatory of Belgrade",
title = "Ion Beam Modification of Reactively Sputtered TiN Thin Films",
number = "84",
pages = "205-208",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6828"
}

Popović, M., Novaković, M., Milosavljević, M., Peruško, D., Milinović, V., Radović, I.,& Bibić, N. M.. (2008). Ion Beam Modification of Reactively Sputtered TiN Thin Films. in Publications of the Astronomical Observatory of Belgrade(84), 205-208.
https://hdl.handle.net/21.15107/rcub_vinar_6828

Popović M, Novaković M, Milosavljević M, Peruško D, Milinović V, Radović I, Bibić NM. Ion Beam Modification of Reactively Sputtered TiN Thin Films. in Publications of the Astronomical Observatory of Belgrade. 2008;(84):205-208.
https://hdl.handle.net/21.15107/rcub_vinar_6828 .

Popović, Maja, Novaković, Mirjana, Milosavljević, Momir, Peruško, Davor, Milinović, Velimir, Radović, Ivan, Bibić, Nataša M., "Ion Beam Modification of Reactively Sputtered TiN Thin Films" in Publications of the Astronomical Observatory of Belgrade, no. 84 (2008):205-208,
https://hdl.handle.net/21.15107/rcub_vinar_6828 .

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  - CONF
AU  - Popović, Maja
AU  - Novaković, Mirjana
AU  - Peruško, Davor
AU  - Radović, Ivan
AU  - Mitrić, M.
AU  - Milosavljević, M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12891
PB  - Belgrade : Serbian Society for Microscopy : Vinča Institute of Nuclear Sciences : Faculty of Biology
PB  - Novi Sad : Faculty of Technical Sciences
C3  - 3SCM-2007 : 3rd Serbian Congress for Microscopy : Proceedings
T1  - Effects of ion implantation on properties of TiN layers
SP  - 125
EP  - 126
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12891
ER  - 

@conference{
author = "Popović, Maja and Novaković, Mirjana and Peruško, Davor and Radović, Ivan and Mitrić, M. and Milosavljević, M.",
year = "2007",
publisher = "Belgrade : Serbian Society for Microscopy : Vinča Institute of Nuclear Sciences : Faculty of Biology, Novi Sad : Faculty of Technical Sciences",
journal = "3SCM-2007 : 3rd Serbian Congress for Microscopy : Proceedings",
title = "Effects of ion implantation on properties of TiN layers",
pages = "125-126",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12891"
}

Popović, M., Novaković, M., Peruško, D., Radović, I., Mitrić, M.,& Milosavljević, M.. (2007). Effects of ion implantation on properties of TiN layers. in 3SCM-2007 : 3rd Serbian Congress for Microscopy : Proceedings
Belgrade : Serbian Society for Microscopy : Vinča Institute of Nuclear Sciences : Faculty of Biology., 125-126.
https://hdl.handle.net/21.15107/rcub_vinar_12891

Popović M, Novaković M, Peruško D, Radović I, Mitrić M, Milosavljević M. Effects of ion implantation on properties of TiN layers. in 3SCM-2007 : 3rd Serbian Congress for Microscopy : Proceedings. 2007;:125-126.
https://hdl.handle.net/21.15107/rcub_vinar_12891 .

Popović, Maja, Novaković, Mirjana, Peruško, Davor, Radović, Ivan, Mitrić, M., Milosavljević, M., "Effects of ion implantation on properties of TiN layers" in 3SCM-2007 : 3rd Serbian Congress for Microscopy : Proceedings (2007):125-126,
https://hdl.handle.net/21.15107/rcub_vinar_12891 .

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 . .

TY  - JOUR
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/123456789/6745
AB  - Semiconductor Zn-Mn-O crystallites were synthesized by a solid state reaction method starting from the thermal decomposition of the appropriate oxalates. Samples were thermally treated in air at temperatures ranging from 400 to 900 degrees C. The nominal concentrations of manganese were x = 0.01, 0.02, 0.04 and 0.10. The samples were investigated by the X-ray powder diffraction method, magnetization measurements and by electron paramagnetic resonance. X-ray diffractgrams show a dominant wurtzite structure of Zn-Mn-O. Room temperature ferromagnelism was observed in Zn-Mn-O samples with manganese concentrations x:! 0.04, thermally treated at low temperature (500 degrees C). The saturation magnetization for the sample with x = 0.01 was 0.05 mu(B)/Mn. The room temperature ferromagnetism seems to be due to the diffusion of Zn into the Mn-oxides gains.
AB  - Ispitivani su poluprovodnički Zn-Mn-O kristali dobijeni metodom sinteze u čvrstom stanju - termičkom dekompozicijom odgovarajućih oksalata i termičkim tretmanom. Termički tretman je izvršen u vazduhu na različitim temperaturama u intervalu od 400 do 900 °C. Nominalne koncentracije mangana su x = 0,01; 0,02; 0,04 i 0,10. Uzorci su ispitivani metodom difrakcije X-zraka na prahu, merenjem magnetizacije i metodom elektronske paramagnetne rezonance. Analiza difraktograma ukazuje na dominantnu vurcitnu kristalnu strukturu sintetisanog Zn-Mn-O materijala. Feromagnetizam na sobnoj temperaturi je uočen na uzorcima Zn-Mn-O sa koncentracijom mangana x ≤ 0,04 termički tretiranim na nižim temperaturama (500 °C). Magnetizacija zasićenja u uzorku x = 0,01 iznosi 0,05 μB/Mn. Ferromagnetna faza je verovatno posledica difuzije Zn u neki manganov oksid.
T2  - Hemijska industrija
T1  - Zn-Mn-O: Ferromagnet at room temperature
T1  - Zn-Mn-O - feromagnetik na sobnoj temperaturi
VL  - 61
IS  - 3
SP  - 147
EP  - 151
DO  - 10.2298/HEMIND0703147M
ER  - 

@article{
author = "Milivojević, Dušan and Blanuša, Jovan and Spasojević, Vojislav and Kusigerski, Vladan and Babić-Stojić, Branka S.",
year = "2007",
abstract = "Semiconductor Zn-Mn-O crystallites were synthesized by a solid state reaction method starting from the thermal decomposition of the appropriate oxalates. Samples were thermally treated in air at temperatures ranging from 400 to 900 degrees C. The nominal concentrations of manganese were x = 0.01, 0.02, 0.04 and 0.10. The samples were investigated by the X-ray powder diffraction method, magnetization measurements and by electron paramagnetic resonance. X-ray diffractgrams show a dominant wurtzite structure of Zn-Mn-O. Room temperature ferromagnelism was observed in Zn-Mn-O samples with manganese concentrations x:! 0.04, thermally treated at low temperature (500 degrees C). The saturation magnetization for the sample with x = 0.01 was 0.05 mu(B)/Mn. The room temperature ferromagnetism seems to be due to the diffusion of Zn into the Mn-oxides gains., Ispitivani su poluprovodnički Zn-Mn-O kristali dobijeni metodom sinteze u čvrstom stanju - termičkom dekompozicijom odgovarajućih oksalata i termičkim tretmanom. Termički tretman je izvršen u vazduhu na različitim temperaturama u intervalu od 400 do 900 °C. Nominalne koncentracije mangana su x = 0,01; 0,02; 0,04 i 0,10. Uzorci su ispitivani metodom difrakcije X-zraka na prahu, merenjem magnetizacije i metodom elektronske paramagnetne rezonance. Analiza difraktograma ukazuje na dominantnu vurcitnu kristalnu strukturu sintetisanog Zn-Mn-O materijala. Feromagnetizam na sobnoj temperaturi je uočen na uzorcima Zn-Mn-O sa koncentracijom mangana x ≤ 0,04 termički tretiranim na nižim temperaturama (500 °C). Magnetizacija zasićenja u uzorku x = 0,01 iznosi 0,05 μB/Mn. Ferromagnetna faza je verovatno posledica difuzije Zn u neki manganov oksid.",
journal = "Hemijska industrija",
title = "Zn-Mn-O: Ferromagnet at room temperature, Zn-Mn-O - feromagnetik na sobnoj temperaturi",
volume = "61",
number = "3",
pages = "147-151",
doi = "10.2298/HEMIND0703147M"
}

Milivojević, D., Blanuša, J., Spasojević, V., Kusigerski, V.,& Babić-Stojić, B. S.. (2007). Zn-Mn-O: Ferromagnet at room temperature. in Hemijska industrija, 61(3), 147-151.
https://doi.org/10.2298/HEMIND0703147M

Milivojević D, Blanuša J, Spasojević V, Kusigerski V, Babić-Stojić BS. Zn-Mn-O: Ferromagnet at room temperature. in Hemijska industrija. 2007;61(3):147-151.
doi:10.2298/HEMIND0703147M .

Milivojević, Dušan, Blanuša, Jovan, Spasojević, Vojislav, Kusigerski, Vladan, Babić-Stojić, Branka S., "Zn-Mn-O: Ferromagnet at room temperature" in Hemijska industrija, 61, no. 3 (2007):147-151,
https://doi.org/10.2298/HEMIND0703147M . .

TY  - JOUR
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Peruško, Davor
AU  - Radović, Ivan
AU  - Milinović, Velimir
AU  - Milosavljević, Momir
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6582
AB  - We present a study of the micro-structural changes induced in Cr-N layers by irradiation with argon ions. The layers were deposited by reactive ion sputtering on (100) Si wafers, to a thickness of 240-280 nm, at different nitrogen partial pressures and different substrate temperatures. The samples were subsequently irradiated with 120 keV Ar+, to 1x10(15) and 1x10(16) ions/cm(2). Structural characterization was performed with Rutherford backscattering spectroscopy, x-ray diffraction analysis and transmission electron microscopy, and we also did electrical resistivity measurements on the samples. It has been found that the layers grow in the form of a polycrystalline columnar structure, with a columnar width of a few tens of nm. The layer composition, Cr2N or CrN, strongly depends on the nitrogen partial pressure during deposition. Ion irradiation induces local micro-structural changes, formation of nano-particles and defects, though the structures retain their polycrystalline nature. The induced crystalline defects yield an increase of electrical resistivity after ion irradiation.
T2  - Materials Science Forum
T1  - Ion Implantation Induced Modifications in Reactively Sputtered Cr-N Layers on Si Substrates
VL  - 555
SP  - 35
EP  - 40
DO  - 10.4028/www.scientific.net/MSF.555.35
ER  - 

@article{
author = "Novaković, Mirjana M. and Popović, Maja and Peruško, Davor and Radović, Ivan and Milinović, Velimir and Milosavljević, Momir",
year = "2007",
abstract = "We present a study of the micro-structural changes induced in Cr-N layers by irradiation with argon ions. The layers were deposited by reactive ion sputtering on (100) Si wafers, to a thickness of 240-280 nm, at different nitrogen partial pressures and different substrate temperatures. The samples were subsequently irradiated with 120 keV Ar+, to 1x10(15) and 1x10(16) ions/cm(2). Structural characterization was performed with Rutherford backscattering spectroscopy, x-ray diffraction analysis and transmission electron microscopy, and we also did electrical resistivity measurements on the samples. It has been found that the layers grow in the form of a polycrystalline columnar structure, with a columnar width of a few tens of nm. The layer composition, Cr2N or CrN, strongly depends on the nitrogen partial pressure during deposition. Ion irradiation induces local micro-structural changes, formation of nano-particles and defects, though the structures retain their polycrystalline nature. The induced crystalline defects yield an increase of electrical resistivity after ion irradiation.",
journal = "Materials Science Forum",
title = "Ion Implantation Induced Modifications in Reactively Sputtered Cr-N Layers on Si Substrates",
volume = "555",
pages = "35-40",
doi = "10.4028/www.scientific.net/MSF.555.35"
}

Novaković, M. M., Popović, M., Peruško, D., Radović, I., Milinović, V.,& Milosavljević, M.. (2007). Ion Implantation Induced Modifications in Reactively Sputtered Cr-N Layers on Si Substrates. in Materials Science Forum, 555, 35-40.
https://doi.org/10.4028/www.scientific.net/MSF.555.35

Novaković MM, Popović M, Peruško D, Radović I, Milinović V, Milosavljević M. Ion Implantation Induced Modifications in Reactively Sputtered Cr-N Layers on Si Substrates. in Materials Science Forum. 2007;555:35-40.
doi:10.4028/www.scientific.net/MSF.555.35 .

Novaković, Mirjana M., Popović, Maja, Peruško, Davor, Radović, Ivan, Milinović, Velimir, Milosavljević, Momir, "Ion Implantation Induced Modifications in Reactively Sputtered Cr-N Layers on Si Substrates" in Materials Science Forum, 555 (2007):35-40,
https://doi.org/10.4028/www.scientific.net/MSF.555.35 . .