Role of defects in the phase transition of VO2 nanoparticles probed by plasmon resonance spectroscopy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

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

Detail(s)

Original languageEnglish
Pages (from-to)780-786
Journal / PublicationNano Letters
Volume12
Issue number2
Online published24 Jan 2012
Publication statusPublished - 8 Feb 2012
Externally publishedYes

Abstract

Defects are known to affect nanoscale phase transitions, but their specific role in the metal-to-insulator transition in VO2 has 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 VO2 nanoparticles, we find that hysteresis width narrows with increasing size, thus illustrating the potential for domain boundary engineering in phase-changing nanostructures. 

Research Area(s)

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

Citation Format(s)

Role of defects in the phase transition of VO2 nanoparticles probed by plasmon resonance spectroscopy. / Appavoo, Kannatassen; Lei, Dang Yuan; Sonnefraud, Yannick; Wang, Bin; Pantelides, Sokrates T.; Maier, Stefan A.; Haglund, Richard F.

In: Nano Letters, Vol. 12, No. 2, 08.02.2012, p. 780-786.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review