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

doi:10.1021/nl203782y

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 publication › Journal article › Academic research › peer-review

218 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 language	English
Pages (from-to)	780-786
Number of pages	7
Journal	Nano Letters
Volume	12
Issue number	2
DOIs	https://doi.org/10.1021/nl203782y
Publication status	Published - 8 Feb 2012
Externally published	Yes

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
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

More information

10.1021/nl203782y

Cite this

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title = "Role of defects in the phase transition of VO2nanoparticles probed by plasmon resonance spectroscopy",

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.",

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AU - Appavoo, Kannatassen

AU - Lei, Dangyuan

AU - Sonnefraud, Yannick

AU - Wang, Bin

AU - Pantelides, Sokrates T.

AU - Maier, Stefan A.

AU - Haglund, Richard F.

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AB - 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.

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KW - density functional theory

KW - domain boundary engineering

KW - interface

KW - localized surface plasmon resonance

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