Enhanced resonant Raman scattering and electron-phonon coupling from self-assembled secondary ZnO nanoparticles

Hsin Ming Cheng, Kuo Feng Lin, Hsu Cheng Hsu, Chih Jen Lin, Li Jiaun Lin, Wen Feng Hsieh

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Self-assembled secondary ZnO nanoparticles, recognized with the agglomeration of crystalline subcrystals, are successfully synthesized by a simple sol-gel method. TEM images display that one artificial cluster behaves in a single-crystal-like wurtzite structure because subcrystals coagulate as the same crystal orientation. Moreover, from the resonant Raman scattering, the as-grown sample exhibits phonon red shift; meanwhile, the coupling strength between electron and longitudinal optical phonon, determined by the ratio of second-to first-order Raman scattering cross sections, diminishes compared with the samples after postannealing at 350 and 500°C. The size dependence of electron-phonon coupling is principally as a result of the Fröhlich interaction.

Original languageEnglish
Pages (from-to)18385-18390
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number39
DOIs
Publication statusPublished - 2005 Oct 6

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Raman scattering
Raman spectra
Nanoparticles
nanoparticles
Electrons
agglomeration
Crystal orientation
red shift
wurtzite
scattering cross sections
Sol-gel process
electrons
Agglomeration
Single crystals
gels
Crystalline materials
Transmission electron microscopy
transmission electron microscopy
single crystals
crystals

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Cheng, Hsin Ming ; Lin, Kuo Feng ; Hsu, Hsu Cheng ; Lin, Chih Jen ; Lin, Li Jiaun ; Hsieh, Wen Feng. / Enhanced resonant Raman scattering and electron-phonon coupling from self-assembled secondary ZnO nanoparticles. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 39. pp. 18385-18390.
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Enhanced resonant Raman scattering and electron-phonon coupling from self-assembled secondary ZnO nanoparticles. / Cheng, Hsin Ming; Lin, Kuo Feng; Hsu, Hsu Cheng; Lin, Chih Jen; Lin, Li Jiaun; Hsieh, Wen Feng.

In: Journal of Physical Chemistry B, Vol. 109, No. 39, 06.10.2005, p. 18385-18390.

Research output: Contribution to journalArticle

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