Role of defects in the phase transition of VO 2 nanoparticles probed by plasmon resonance spectroscopy

Academic Article

Abstract

  • Defects are known to affect nanoscale phase transitions, but their specific role in the metal-to-insulator transition in VO 2 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 VO 2 nanoparticles, we find that hysteresis width narrows with increasing size, thus illustrating the potential for domain boundary engineering in phase-changing nanostructures. © 2012 American Chemical Society.
  • Digital Object Identifier (doi)

    Author List

  • Appavoo K; Lei DY; Sonnefraud Y; Wang B; Pantelides ST; Maier SA; Haglund RF
  • Start Page

  • 780
  • End Page

  • 786
  • Volume

  • 12
  • Issue

  • 2