Vanadium oxide nanowire phase and orientation analyzed by Raman spectroscopy

J. Y. Chou; J. L. Lensch-Falk; E. R. Hemesath; L. J. Lauhon

doi:10.1063/1.3075763

Vanadium oxide nanowire phase and orientation analyzed by Raman spectroscopy

J. Y. Chou, J. L. Lensch-Falk, E. R. Hemesath, L. J. Lauhon

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

Phase-selective growth of VO₂ and V₂O₅ nanowires was realized via catalyst-free physical vapor deposition from bulk VO₂ powder. Single nanowire Raman spectroscopy was used to analyze the distribution of the vanadium oxide phases within the reactor. VO ₂(V₂O₅) nanowires were identified by characteristic peaks at 197, 224, and 620 cm^-1 (149, 700, and 994 cm^-1). Electron diffraction and polarization-dependent Raman spectra indicated that the growth directions of VO₂ and V₂O ₅ nanowires were [100] and [010]. Analysis of Raman spectra in two polarization configurations is sufficient to distinguish between low-index nanowire growth directions for the V₂O₅ phase. Single nanostructure Raman measurements thus provide a means to rapidly analyze the phase and growth direction of anisotropic nanostructures.

Original language	English (US)
Article number	034310
Journal	Journal of Applied Physics
Volume	105
Issue number	3
DOIs	https://doi.org/10.1063/1.3075763
State	Published - 2009

Funding

This work was supported by the National Science Foundation (J.L.L, E.R.H.), the Sloan Foundation through a Sloan Research Fellowship (L.J.L.), and the Office of Naval Research through the DURIP program. We thank Francisco Lopez for assistance with the Raman measurements and Jonathan Allen for assistance with the AFM and Raman measurements. Electron microscopy measurements were conducted in the NUANCE facility.

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Vanadium oxide nanowire phase and orientation analyzed by Raman spectroscopy",

abstract = "Phase-selective growth of VO2 and V2O5 nanowires was realized via catalyst-free physical vapor deposition from bulk VO2 powder. Single nanowire Raman spectroscopy was used to analyze the distribution of the vanadium oxide phases within the reactor. VO 2(V2O5) nanowires were identified by characteristic peaks at 197, 224, and 620 cm-1 (149, 700, and 994 cm-1). Electron diffraction and polarization-dependent Raman spectra indicated that the growth directions of VO2 and V2O 5 nanowires were [100] and [010]. Analysis of Raman spectra in two polarization configurations is sufficient to distinguish between low-index nanowire growth directions for the V2O5 phase. Single nanostructure Raman measurements thus provide a means to rapidly analyze the phase and growth direction of anisotropic nanostructures.",

author = "Chou, {J. Y.} and Lensch-Falk, {J. L.} and Hemesath, {E. R.} and Lauhon, {L. J.}",

note = "Funding Information: This work was supported by the National Science Foundation (J.L.L, E.R.H.), the Sloan Foundation through a Sloan Research Fellowship (L.J.L.), and the Office of Naval Research through the DURIP program. We thank Francisco Lopez for assistance with the Raman measurements and Jonathan Allen for assistance with the AFM and Raman measurements. Electron microscopy measurements were conducted in the NUANCE facility.",

year = "2009",

doi = "10.1063/1.3075763",

language = "English (US)",

volume = "105",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "3",

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T1 - Vanadium oxide nanowire phase and orientation analyzed by Raman spectroscopy

AU - Chou, J. Y.

AU - Lensch-Falk, J. L.

AU - Hemesath, E. R.

AU - Lauhon, L. J.

N1 - Funding Information: This work was supported by the National Science Foundation (J.L.L, E.R.H.), the Sloan Foundation through a Sloan Research Fellowship (L.J.L.), and the Office of Naval Research through the DURIP program. We thank Francisco Lopez for assistance with the Raman measurements and Jonathan Allen for assistance with the AFM and Raman measurements. Electron microscopy measurements were conducted in the NUANCE facility.

PY - 2009

Y1 - 2009

N2 - Phase-selective growth of VO2 and V2O5 nanowires was realized via catalyst-free physical vapor deposition from bulk VO2 powder. Single nanowire Raman spectroscopy was used to analyze the distribution of the vanadium oxide phases within the reactor. VO 2(V2O5) nanowires were identified by characteristic peaks at 197, 224, and 620 cm-1 (149, 700, and 994 cm-1). Electron diffraction and polarization-dependent Raman spectra indicated that the growth directions of VO2 and V2O 5 nanowires were [100] and [010]. Analysis of Raman spectra in two polarization configurations is sufficient to distinguish between low-index nanowire growth directions for the V2O5 phase. Single nanostructure Raman measurements thus provide a means to rapidly analyze the phase and growth direction of anisotropic nanostructures.

AB - Phase-selective growth of VO2 and V2O5 nanowires was realized via catalyst-free physical vapor deposition from bulk VO2 powder. Single nanowire Raman spectroscopy was used to analyze the distribution of the vanadium oxide phases within the reactor. VO 2(V2O5) nanowires were identified by characteristic peaks at 197, 224, and 620 cm-1 (149, 700, and 994 cm-1). Electron diffraction and polarization-dependent Raman spectra indicated that the growth directions of VO2 and V2O 5 nanowires were [100] and [010]. Analysis of Raman spectra in two polarization configurations is sufficient to distinguish between low-index nanowire growth directions for the V2O5 phase. Single nanostructure Raman measurements thus provide a means to rapidly analyze the phase and growth direction of anisotropic nanostructures.

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IS - 3

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Vanadium oxide nanowire phase and orientation analyzed by Raman spectroscopy

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