標題: Enhanced resonant Raman scattering and electron-phonon coupling from self-assembled secondary ZnO nanoparticles
作者: Cheng, HM
Lin, KF
Hsu, HC
Lin, CJ
Lin, LJ
Hsieh, WF
光電工程學系
Department of Photonics
公開日期: 6-Oct-2005
摘要: 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 degrees C. The size dependence of electron-phonon coupling is principally as a result of the Frohlich interaction.
URI: http://dx.doi.org/10.1021/jp0533731
http://hdl.handle.net/11536/13169
ISSN: 1520-6106
DOI: 10.1021/jp0533731
期刊: JOURNAL OF PHYSICAL CHEMISTRY B
Volume: 109
Issue: 39
起始頁: 18385
結束頁: 18390
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