Role of defects in the phase transition of VO2nanoparticles probed by plasmon resonance spectroscopy

Kannatassen Appavoo, Dangyuan Lei, Yannick Sonnefraud, Bin Wang, Sokrates T. Pantelides, Stefan A. Maier, Richard F. Haglund

Research output: Journal article publicationJournal articleAcademic researchpeer-review

157 Citations (Scopus)

Abstract

Defects are known to affect nanoscale phase transitions, but their specific role in the metal-to-insulator transition in VO2has remained elusive. By combining plasmon resonance nanospectroscopy with density functional calculations, we correlate decreased phase-transition energy with oxygen vacancies created by strain at grain boundaries. By measuring the degree of metallization in the lithographically defined VO2nanoparticles, we find that hysteresis width narrows with increasing size, thus illustrating the potential for domain boundary engineering in phase-changing nanostructures.
Original languageEnglish
Pages (from-to)780-786
Number of pages7
JournalNano Letters
Volume12
Issue number2
DOIs
Publication statusPublished - 8 Feb 2012
Externally publishedYes

Keywords

  • defect
  • density functional theory
  • domain boundary engineering
  • interface
  • localized surface plasmon resonance
  • phase transition
  • size effect
  • Vanadium dioxide
  • VO 2

ASJC Scopus subject areas

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

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