TY  - JOUR
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković-Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Savić, Slavica M.
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Podlogar, Matejka
AU  - Kocen, Matej
AU  - Rapljenović, Željko
AU  - Ivek, Tomislav
AU  - Lazović, Vladimir
AU  - Dojčinović, Biljana
AU  - Branković, Goran
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4403
AB  - Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics
EP  - 5575
IS  - 15
SP  - 5566
VL  - 40
DO  - 10.1016/j.jeurceramsoc.2020.06.062
ER  - 

@article{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković-Golić, Danijela and Ribić, Vesna and Branković, Zorica and Savić, Slavica M. and Dapčević, Aleksandra and Bernik, Slavko and Podlogar, Matejka and Kocen, Matej and Rapljenović, Željko and Ivek, Tomislav and Lazović, Vladimir and Dojčinović, Biljana and Branković, Goran",
year = "2020",
abstract = "Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics",
pages = "5575-5566",
number = "15",
volume = "40",
doi = "10.1016/j.jeurceramsoc.2020.06.062"
}

Vukašinović, J., Počuča-Nešić, M., Luković-Golić, D., Ribić, V., Branković, Z., Savić, S. M., Dapčević, A., Bernik, S., Podlogar, M., Kocen, M., Rapljenović, Ž., Ivek, T., Lazović, V., Dojčinović, B.,& Branković, G.. (2020). The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 40(15), 5566-5575.
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062

Vukašinović J, Počuča-Nešić M, Luković-Golić D, Ribić V, Branković Z, Savić SM, Dapčević A, Bernik S, Podlogar M, Kocen M, Rapljenović Ž, Ivek T, Lazović V, Dojčinović B, Branković G. The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society. 2020;40(15):5566-5575.
doi:10.1016/j.jeurceramsoc.2020.06.062 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković-Golić, Danijela, Ribić, Vesna, Branković, Zorica, Savić, Slavica M., Dapčević, Aleksandra, Bernik, Slavko, Podlogar, Matejka, Kocen, Matej, Rapljenović, Željko, Ivek, Tomislav, Lazović, Vladimir, Dojčinović, Biljana, Branković, Goran, "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics" in Journal of the European Ceramic Society, 40, no. 15 (2020):5566-5575,
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062 . .

TY  - JOUR
AU  - Luković-Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Dragović, Jure
AU  - Torić, Filip
AU  - Ćirković, Jovana
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4079
AB  - Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium
EP  - 19165
IS  - 15
SP  - 19158
VL  - 45
DO  - 10.1016/j.ceramint.2019.06.162
ER  - 

@article{
author = "Luković-Golić, Danijela and Radojković, Aleksandar and Dapčević, Aleksandra and Pajić, Damir and Dragović, Jure and Torić, Filip and Ćirković, Jovana and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium",
pages = "19165-19158",
number = "15",
volume = "45",
doi = "10.1016/j.ceramint.2019.06.162"
}

Luković-Golić, D., Radojković, A., Dapčević, A., Pajić, D., Dragović, J., Torić, F., Ćirković, J., Branković, G.,& Branković, Z.. (2019). Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(15), 19158-19165.
https://doi.org/10.1016/j.ceramint.2019.06.162

Luković-Golić D, Radojković A, Dapčević A, Pajić D, Dragović J, Torić F, Ćirković J, Branković G, Branković Z. Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International. 2019;45(15):19158-19165.
doi:10.1016/j.ceramint.2019.06.162 .

Luković-Golić, Danijela, Radojković, Aleksandar, Dapčević, Aleksandra, Pajić, Damir, Dragović, Jure, Torić, Filip, Ćirković, Jovana, Branković, Goran, Branković, Zorica, "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium" in Ceramics International, 45, no. 15 (2019):19158-19165,
https://doi.org/10.1016/j.ceramint.2019.06.162 . .

TY  - JOUR
AU  - Radojković, Aleksandar
AU  - Luković-Golić, Danijela
AU  - Ćirković, Jovana
AU  - Marinković-Stanojević, Zorica
AU  - Pajić, Damir
AU  - Torić, Filip
AU  - Dapčević, Aleksandra
AU  - Vulić, Predrag
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3856
AB  - Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Tuning of BiFeO3 multiferroic properties by light doping with Nb
EP  - 16744
IS  - 14
SP  - 16739
VL  - 44
DO  - 10.1016/j.ceramint.2018.06.103
ER  - 

@article{
author = "Radojković, Aleksandar and Luković-Golić, Danijela and Ćirković, Jovana and Marinković-Stanojević, Zorica and Pajić, Damir and Torić, Filip and Dapčević, Aleksandra and Vulić, Predrag and Branković, Zorica and Branković, Goran",
year = "2018",
abstract = "Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Tuning of BiFeO3 multiferroic properties by light doping with Nb",
pages = "16744-16739",
number = "14",
volume = "44",
doi = "10.1016/j.ceramint.2018.06.103"
}

Radojković, A., Luković-Golić, D., Ćirković, J., Marinković-Stanojević, Z., Pajić, D., Torić, F., Dapčević, A., Vulić, P., Branković, Z.,& Branković, G.. (2018). Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(14), 16739-16744.
https://doi.org/10.1016/j.ceramint.2018.06.103

Radojković A, Luković-Golić D, Ćirković J, Marinković-Stanojević Z, Pajić D, Torić F, Dapčević A, Vulić P, Branković Z, Branković G. Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International. 2018;44(14):16739-16744.
doi:10.1016/j.ceramint.2018.06.103 .

Radojković, Aleksandar, Luković-Golić, Danijela, Ćirković, Jovana, Marinković-Stanojević, Zorica, Pajić, Damir, Torić, Filip, Dapčević, Aleksandra, Vulić, Predrag, Branković, Zorica, Branković, Goran, "Tuning of BiFeO3 multiferroic properties by light doping with Nb" in Ceramics International, 44, no. 14 (2018):16739-16744,
https://doi.org/10.1016/j.ceramint.2018.06.103 . .

TY  - JOUR
AU  - Luković-Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Ćirković, Jovana
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Tasić, Nikola
AU  - Savić, Slavica M.
AU  - Počuča Nešić, Milica
AU  - Marković, Smilja
AU  - Branković, Goran
AU  - Marinković-Stanojević, Zorica
AU  - Branković, Zorica
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3473
AB  - BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods
EP  - 1631
IS  - 7
SP  - 1623
VL  - 36
DO  - 10.1016/j.jeurceramsoc.2016.01.031
ER  - 

@article{
author = "Luković-Golić, Danijela and Radojković, Aleksandar and Ćirković, Jovana and Dapčević, Aleksandra and Pajić, Damir and Tasić, Nikola and Savić, Slavica M. and Počuča Nešić, Milica and Marković, Smilja and Branković, Goran and Marinković-Stanojević, Zorica and Branković, Zorica",
year = "2016",
abstract = "BiFeO3 powders were synthesized by sonochemically assisted hydrothermal and hydro-evaporation methods. The X-ray diffraction confirmed the presence of secondary phases, Bi25FeO39 and Bi2Fe4O9, in as prepared BiFeO3 powders. Optimization of sintering conditions indicated that temperature of 800 degrees C and time of 2 h after pressing at 9 t/cm(2) provided ceramics samples with"the highest density (up to 96% of theoretical density) and the lowest content of secondary phases. Ferroelectric and magnetic characterization was performed on two selected ceramics samples with the highest densities. Ceramics obtained from the powder synthesized by the hydrothermal method showed greater lattice distortion along [1 1 1] axis and smaller grains, which resulted in larger values of electric polarization at room temperature. It also exhibited less Fe(3d)-O(2p) orbital overlapping due to a larger Fe-O-Fe bond angle, causing lower antiferromagnetic ordering and weak ferromagnetic behavior at low temperatures.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods",
pages = "1631-1623",
number = "7",
volume = "36",
doi = "10.1016/j.jeurceramsoc.2016.01.031"
}

Luković-Golić, D., Radojković, A., Ćirković, J., Dapčević, A., Pajić, D., Tasić, N., Savić, S. M., Počuča Nešić, M., Marković, S., Branković, G., Marinković-Stanojević, Z.,& Branković, Z.. (2016). Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 36(7), 1623-1631.
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031

Luković-Golić D, Radojković A, Ćirković J, Dapčević A, Pajić D, Tasić N, Savić SM, Počuča Nešić M, Marković S, Branković G, Marinković-Stanojević Z, Branković Z. Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods. in Journal of the European Ceramic Society. 2016;36(7):1623-1631.
doi:10.1016/j.jeurceramsoc.2016.01.031 .

Luković-Golić, Danijela, Radojković, Aleksandar, Ćirković, Jovana, Dapčević, Aleksandra, Pajić, Damir, Tasić, Nikola, Savić, Slavica M., Počuča Nešić, Milica, Marković, Smilja, Branković, Goran, Marinković-Stanojević, Zorica, Branković, Zorica, "Structural, ferroelectric and magnetic properties of BiFeO3 synthesized by sonochemically assisted hydrothermal and hydro-evaporation chemical methods" in Journal of the European Ceramic Society, 36, no. 7 (2016):1623-1631,
https://doi.org/10.1016/j.jeurceramsoc.2016.01.031 . .

TY  - JOUR
AU  - Luković Golić, Danijela
AU  - Branković, Goran
AU  - Počuča-Nešić, Milica
AU  - Vojisavljević, Katarina
AU  - Recnik, Aleksander
AU  - Daneu, Nina
AU  - Bernik, Slavko
AU  - Šćepanović, Maja
AU  - Poleti, Dejan
AU  - Branković, Zorica
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5657
AB  - Zinc oxide nanopowders were synthesized by the sol-gel method from an ethanol solution of zinc acetate dihydrate. Detailed structural and microstructural investigations were carried out using x-ray diffraction, Raman spectroscopy, thermogravimetric and differential thermal analyses, as well as high-resolution transmission electron microscopy (TEM) and field-emission scanning electron microscopy. The intermediate compound of the reaction was layered zinc hydroxide acetate that further transforms into hexagonally shaped ZnO crystalline nanoplates (d(m) = 4 nm), which aggregate into larger spherical particles. According to the TEM analysis the ZnO nanoparticles were self-assembled into larger particles with the same orientation, i.e. aligned lattice planes of the particles. A further solvothermal treatment resulted in hexagonal, prismatic ZnO mesocrystals.
PB  - IOP Publishing Ltd, Bristol
T2  - Nanotechnology
T1  - Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O
IS  - 39
VL  - 22
DO  - 10.1088/0957-4484/22/39/395603
ER  - 

@article{
author = "Luković Golić, Danijela and Branković, Goran and Počuča-Nešić, Milica and Vojisavljević, Katarina and Recnik, Aleksander and Daneu, Nina and Bernik, Slavko and Šćepanović, Maja and Poleti, Dejan and Branković, Zorica",
year = "2011",
abstract = "Zinc oxide nanopowders were synthesized by the sol-gel method from an ethanol solution of zinc acetate dihydrate. Detailed structural and microstructural investigations were carried out using x-ray diffraction, Raman spectroscopy, thermogravimetric and differential thermal analyses, as well as high-resolution transmission electron microscopy (TEM) and field-emission scanning electron microscopy. The intermediate compound of the reaction was layered zinc hydroxide acetate that further transforms into hexagonally shaped ZnO crystalline nanoplates (d(m) = 4 nm), which aggregate into larger spherical particles. According to the TEM analysis the ZnO nanoparticles were self-assembled into larger particles with the same orientation, i.e. aligned lattice planes of the particles. A further solvothermal treatment resulted in hexagonal, prismatic ZnO mesocrystals.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Nanotechnology",
title = "Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O",
number = "39",
volume = "22",
doi = "10.1088/0957-4484/22/39/395603"
}

Luković Golić, D., Branković, G., Počuča-Nešić, M., Vojisavljević, K., Recnik, A., Daneu, N., Bernik, S., Šćepanović, M., Poleti, D.,& Branković, Z.. (2011). Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O. in Nanotechnology
IOP Publishing Ltd, Bristol., 22(39).
https://doi.org/10.1088/0957-4484/22/39/395603

Luković Golić D, Branković G, Počuča-Nešić M, Vojisavljević K, Recnik A, Daneu N, Bernik S, Šćepanović M, Poleti D, Branković Z. Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O. in Nanotechnology. 2011;22(39).
doi:10.1088/0957-4484/22/39/395603 .

Luković Golić, Danijela, Branković, Goran, Počuča-Nešić, Milica, Vojisavljević, Katarina, Recnik, Aleksander, Daneu, Nina, Bernik, Slavko, Šćepanović, Maja, Poleti, Dejan, Branković, Zorica, "Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O" in Nanotechnology, 22, no. 39 (2011),
https://doi.org/10.1088/0957-4484/22/39/395603 . .