Confocal Raman microscopy across the metal - Insulator transition of single vanadium dioxide nanoparticles

Eugenii U. Donev, Rene Lopez, Leonard C. Feldman, Richard F. Haglund

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

We present the first Raman scattering measurements on nanoparticulate vanadium dioxide (V0 2), as well as the first observations of the temperature-induced phase transition in individual V0 2 nanoparticles (NPs). We compare the Raman response of two V0 2 NPs and a companion V0 2 film undergoing their monoclinic-tetragonal-monoclinic transformations and offer qualitative explanations for the large observed differences in hysteresis width. While bulk crystals and contiguous films contain numerous nucleation sites, individual NPs likely harbor only a few, which may make it possible to correlate detectable defects (e.g., grain boundaries and dislocations) with the "ease" of switching phases, as quantified by the width of the thermal hysteresis.

Original languageEnglish
Pages (from-to)702-706
Number of pages5
JournalNano letters
Volume9
Issue number2
DOIs
Publication statusPublished - Feb 11 2009

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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