Raman spectroscopy and structure of crystalline gallium phosphide nanowires

Qihua Xiong, R. Gupta, K. W. Adu, E. C. Dickey, G. D. Lian, D. Tham, J. E. Fischer, P. C. Eklund

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Gallium phosphide nanowires with a most probable diameter of ∼20.0 nm and more than 10 μm in length have been synthesized by pulsed laser vaporization of a heated GaP/5% Au target. The morphology and microstructure of GaP nanowires have been investigated by scanning electron microscopy and transmission electron microscopy. Twins have been observed along the crystalline nanowires, which have a growth direction of [111]. Raman scattering shows a 4 cm -1 downshift of the longitudinal optical phonon peak in the nanowire with respect to the bulk; the transverse optical phonon frequency and line width are, however, the same as in the bulk. The quantum confinement model first proposed by Richter et al. cannot explain the observed behavior of the Raman modes.

Original languageEnglish (US)
Pages (from-to)335-339
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume3
Issue number4
DOIs
StatePublished - Aug 2003

All Science Journal Classification (ASJC) codes

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

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