Influence of dimensionality on phase transition in VO2 nanocrystals

2013
Authors
Blagojević, Vladimir A.
Obradović, Nina

Cvjetićanin, Nikola

Minić, Dragica M.

Contributors
Ristić, Momčilo M.Article (Published version)
Metadata
Show full item recordAbstract
Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65°C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials. [Projekat Ministarstva nauke Rep...ublike Srbije, br. 142015]
Keywords:
nanocrystals / vanadium oxide / phase transition / size effectsSource:
Science of Sintering, 2013, 45, 3, 305-311Publisher:
- Belgrade : International Institute for the Science of Sintering
Funding / projects:
DOI: 10.2298/SOS1303305B
ISSN: 0350-820X (Print); 1820-7413
WoS: 000339449200007
Scopus: 2-s2.0-84893402989
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Blagojević, Vladimir A. AU - Obradović, Nina AU - Cvjetićanin, Nikola AU - Minić, Dragica M. PY - 2013 UR - https://dais.sanu.ac.rs/123456789/373 AB - Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65°C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials. [Projekat Ministarstva nauke Republike Srbije, br. 142015] PB - Belgrade : International Institute for the Science of Sintering T2 - Science of Sintering T1 - Influence of dimensionality on phase transition in VO2 nanocrystals SP - 305 EP - 311 VL - 45 IS - 3 DO - 10.2298/SOS1303305B UR - https://hdl.handle.net/21.15107/rcub_dais_373 ER -
@article{ author = "Blagojević, Vladimir A. and Obradović, Nina and Cvjetićanin, Nikola and Minić, Dragica M.", year = "2013", abstract = "Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65°C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials. [Projekat Ministarstva nauke Republike Srbije, br. 142015]", publisher = "Belgrade : International Institute for the Science of Sintering", journal = "Science of Sintering", title = "Influence of dimensionality on phase transition in VO2 nanocrystals", pages = "305-311", volume = "45", number = "3", doi = "10.2298/SOS1303305B", url = "https://hdl.handle.net/21.15107/rcub_dais_373" }
Blagojević, V. A., Obradović, N., Cvjetićanin, N.,& Minić, D. M.. (2013). Influence of dimensionality on phase transition in VO2 nanocrystals. in Science of Sintering Belgrade : International Institute for the Science of Sintering., 45(3), 305-311. https://doi.org/10.2298/SOS1303305B https://hdl.handle.net/21.15107/rcub_dais_373
Blagojević VA, Obradović N, Cvjetićanin N, Minić DM. Influence of dimensionality on phase transition in VO2 nanocrystals. in Science of Sintering. 2013;45(3):305-311. doi:10.2298/SOS1303305B https://hdl.handle.net/21.15107/rcub_dais_373 .
Blagojević, Vladimir A., Obradović, Nina, Cvjetićanin, Nikola, Minić, Dragica M., "Influence of dimensionality on phase transition in VO2 nanocrystals" in Science of Sintering, 45, no. 3 (2013):305-311, https://doi.org/10.2298/SOS1303305B ., https://hdl.handle.net/21.15107/rcub_dais_373 .