TY  - JOUR
AU  - Tomović, Aleksandar
AU  - Savić, J. J.
AU  - Bakic, N. Lj.
AU  - Bortel, G.
AU  - Faigel, G.
AU  - Žikić, Radomir
AU  - Jovanović, Vladimir
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5851
AB  - Prolonged annealing of pentacene thin films in air leads to the formation of nano- and micro-scale rod-shaped structures at temperatures equal to or higher than 130 degrees C. Scanning electron microscopy measurements indicated their crystalline structure, while UV-vis absorption spectra revealed presence of different species of oxidized pentacene, including 6,13-pentacenequinone. The mechanism of growth of microcrystals from oxidized pentacene molecules is discussed. Raman and UV-vis absorption spectra dependences on film thickness (in 30-300 nm range) and on thermal annealing conditions (in air and nitrogen at ambient pressure at 100 and 150 degrees C) were also studied. These spectra are not largely affected by annealing if it is performed in nitrogen at any of studied temperatures and annealing times (few hours to few days). However, if annealing is performed in air, at temperatures 130 degrees C and higher, changes in spectral features are significant due to film oxidation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Vacuum
T1  - Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air
EP  - 42
SP  - 36
VL  - 144
DO  - 10.1016/j.vacuum.2017.07.012
ER  - 

@article{
author = "Tomović, Aleksandar and Savić, J. J. and Bakic, N. Lj. and Bortel, G. and Faigel, G. and Žikić, Radomir and Jovanović, Vladimir",
year = "2017",
abstract = "Prolonged annealing of pentacene thin films in air leads to the formation of nano- and micro-scale rod-shaped structures at temperatures equal to or higher than 130 degrees C. Scanning electron microscopy measurements indicated their crystalline structure, while UV-vis absorption spectra revealed presence of different species of oxidized pentacene, including 6,13-pentacenequinone. The mechanism of growth of microcrystals from oxidized pentacene molecules is discussed. Raman and UV-vis absorption spectra dependences on film thickness (in 30-300 nm range) and on thermal annealing conditions (in air and nitrogen at ambient pressure at 100 and 150 degrees C) were also studied. These spectra are not largely affected by annealing if it is performed in nitrogen at any of studied temperatures and annealing times (few hours to few days). However, if annealing is performed in air, at temperatures 130 degrees C and higher, changes in spectral features are significant due to film oxidation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Vacuum",
title = "Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air",
pages = "42-36",
volume = "144",
doi = "10.1016/j.vacuum.2017.07.012"
}

Tomović, A., Savić, J. J., Bakic, N. Lj., Bortel, G., Faigel, G., Žikić, R.,& Jovanović, V.. (2017). Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air. in Vacuum
Pergamon-Elsevier Science Ltd, Oxford., 144, 36-42.
https://doi.org/10.1016/j.vacuum.2017.07.012

Tomović A, Savić JJ, Bakic NL, Bortel G, Faigel G, Žikić R, Jovanović V. Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air. in Vacuum. 2017;144:36-42.
doi:10.1016/j.vacuum.2017.07.012 .

Tomović, Aleksandar, Savić, J. J., Bakic, N. Lj., Bortel, G., Faigel, G., Žikić, Radomir, Jovanović, Vladimir, "Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air" in Vacuum, 144 (2017):36-42,
https://doi.org/10.1016/j.vacuum.2017.07.012 . .

TY  - JOUR
AU  - Nikolić, Vesna
AU  - Kamberović, Željko
AU  - Korać, Marija
AU  - Sokić, Miroslav
AU  - Anđić, Zoran
AU  - Tomović, Aleksandar
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2902
AB  - In the present study, Ni-Pd/Al2O3 catalyst supported on alpha-Al2O3 based foam was prepared and evaluated in the dry methane reforming process. Corresponding metal chlorides were deposited to the foam surface by impregnation of the foam with ultrasonically aerosolized salt solutions at 473 K and drying at that temperature. Calcination step was excluded and the catalyst was reduced at very low temperature 533 K. The reforming experiment lasted for 3 h, with standing time of 1 h at the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were reached on the basis of CO and H-2 yields.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Ni-pd/al(2)o(3) catalyst supported on reticulated ceramic foam for dry methane reforming
EP  - 63
IS  - 1
SP  - 57
VL  - 21
DO  - 10.30544/133
ER  - 

@article{
author = "Nikolić, Vesna and Kamberović, Željko and Korać, Marija and Sokić, Miroslav and Anđić, Zoran and Tomović, Aleksandar",
year = "2015",
abstract = "In the present study, Ni-Pd/Al2O3 catalyst supported on alpha-Al2O3 based foam was prepared and evaluated in the dry methane reforming process. Corresponding metal chlorides were deposited to the foam surface by impregnation of the foam with ultrasonically aerosolized salt solutions at 473 K and drying at that temperature. Calcination step was excluded and the catalyst was reduced at very low temperature 533 K. The reforming experiment lasted for 3 h, with standing time of 1 h at the following temperatures: 873, 973 and 1023 K. Conclusions on selectivity, catalytic activity and stability were reached on the basis of CO and H-2 yields.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Ni-pd/al(2)o(3) catalyst supported on reticulated ceramic foam for dry methane reforming",
pages = "63-57",
number = "1",
volume = "21",
doi = "10.30544/133"
}

Nikolić, V., Kamberović, Ž., Korać, M., Sokić, M., Anđić, Z.,& Tomović, A.. (2015). Ni-pd/al(2)o(3) catalyst supported on reticulated ceramic foam for dry methane reforming. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 21(1), 57-63.
https://doi.org/10.30544/133

Nikolić V, Kamberović Ž, Korać M, Sokić M, Anđić Z, Tomović A. Ni-pd/al(2)o(3) catalyst supported on reticulated ceramic foam for dry methane reforming. in Metallurgical & Materials Engineering. 2015;21(1):57-63.
doi:10.30544/133 .

Nikolić, Vesna, Kamberović, Željko, Korać, Marija, Sokić, Miroslav, Anđić, Zoran, Tomović, Aleksandar, "Ni-pd/al(2)o(3) catalyst supported on reticulated ceramic foam for dry methane reforming" in Metallurgical & Materials Engineering, 21, no. 1 (2015):57-63,
https://doi.org/10.30544/133 . .