期刊
NANOMATERIALS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/nano12030330
关键词
vanadium pentoxide; thin film; ultrafast pump-probe
类别
资金
- National Key Research and Development Program of China [2018YFB1107401]
- National Natural Science Foundation of China [61775236]
In this study, the phase transition properties of V2O5 thin films were first explored using femtosecond laser-induced pump-probe spectroscopy. The results show that the phase transition processes occur on an ultrafast timescale and are dependent on the properties of the substrates and the energy density of the pump laser. The proposed oxygen vacancies theory provides valuable insights into potential applications of V2O5 films.
Vanadium pentoxide can undergo a reversible phase transition by heating above 260 degrees C; its non-thermal phase transition, as well as ultrafast dynamical processes, is still not known. Here, femtosecond laser-induced phase transition properties in V2O5 thin films were first explored using femtosecond time-resolved pump-probe spectroscopy. The results show that the phase transient processes occur on a 10(-15)-10(-13) temporal scale. The phase transition and recovery properties are dependent on both the substrates and pump laser energy densities. We propose the oxygen vacancies theory to explain the results, and we provide valuable insights into V2O5 films for potential applications.
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