TY - JOUR
T1 - Vanadium-Al2O3 nanostructured thin films prepared by pulsed laser deposition
T2 - Optical switching
AU - Núñez-Sánchez, S.
AU - Serna, R.
AU - de Castro, M. Jiménez
AU - López, J. García
AU - Petford-Long, A. K.
AU - Morhange, J. F.
PY - 2007/7/31
Y1 - 2007/7/31
N2 - The formation and optical response of VOx nanoparticles embedded in amorphous aluminium oxide (Al2O3) thin films by pulsed laser deposition is studied. The thin films have been grown by alternate laser ablation of V and Al2O3 targets, which has resulted in a multilayer structure with embedded nanoparticles. The V content has been varied by changing the number of pulses on the V target. It is found that VOx nanoparticles with dimensions around 5 nm have been formed. The structural analysis shows that the vanadium nanoparticles are oxidized, although probably there is not a unique oxide phase for each sample. The films show a different optical response depending on their vanadium content. Optical switching as a function of temperature has been observed for the two films with the highest vanadium content, at transition temperatures of about -20 °C and 315 °C thus suggesting the presence of nanoparticles with compositions V4O7 and V2O5, respectively.
AB - The formation and optical response of VOx nanoparticles embedded in amorphous aluminium oxide (Al2O3) thin films by pulsed laser deposition is studied. The thin films have been grown by alternate laser ablation of V and Al2O3 targets, which has resulted in a multilayer structure with embedded nanoparticles. The V content has been varied by changing the number of pulses on the V target. It is found that VOx nanoparticles with dimensions around 5 nm have been formed. The structural analysis shows that the vanadium nanoparticles are oxidized, although probably there is not a unique oxide phase for each sample. The films show a different optical response depending on their vanadium content. Optical switching as a function of temperature has been observed for the two films with the highest vanadium content, at transition temperatures of about -20 °C and 315 °C thus suggesting the presence of nanoparticles with compositions V4O7 and V2O5, respectively.
KW - Nanoparticles
KW - Optical switching
KW - Pulsed laser deposition
KW - Vanadium
UR - http://www.scopus.com/inward/record.url?scp=34447313665&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2007.02.123
DO - 10.1016/j.apsusc.2007.02.123
M3 - Article (Academic Journal)
AN - SCOPUS:34447313665
SN - 0169-4332
VL - 253
SP - 8136
EP - 8140
JO - Applied Surface Science
JF - Applied Surface Science
IS - 19
ER -