中国物理B ›› 2004, Vol. 13 ›› Issue (10): 1753-1757.doi: 10.1088/1009-1963/13/10/032

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Raman spectra of ZnSe nanoparticles synthesized by thermal evaporation method

安辉芝, 赵清, 杜为民   

  1. Institute of Modern Optics, School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2004-02-13 修回日期:2004-03-29 出版日期:2005-06-20 发布日期:2005-06-20

Raman spectra of ZnSe nanoparticles synthesized by thermal evaporation method

An Hui-Zhi (安辉芝), Zhao Qing (赵清), Du Wei-Min (杜为民)   

  1. Institute of Modern Optics, School of Physics, Peking University, Beijing 100871, China
  • Received:2004-02-13 Revised:2004-03-29 Online:2005-06-20 Published:2005-06-20

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摘要： ZnSe nanoparticles were synthesized by using a thermal evaporation method for a vapour phase reaction of zinc and selenium sources. The sample was characterized by XRD, TEM, HRTEM and Raman spectroscopy. Raman spectra of longitudinal-optical (LO) like mode was analysed by a macroscopic continuum dielectric model. Large broadening of LO-mode is homogeneous and comes from the relaxation of the phonons at the interface and contribution of defects. Surface modes give the main contribution to the asymmetry of the lineshape.

Abstract: ZnSe nanoparticles were synthesized by using a thermal evaporation method for a vapour phase reaction of zinc and selenium sources. The sample was characterized by XRD, TEM, HRTEM and Raman spectroscopy. Raman spectra of longitudinal-optical (LO) like mode was analysed by a macroscopic continuum dielectric model. Large broadening of LO-mode is homogeneous and comes from the relaxation of the phonons at the interface and contribution of defects. Surface modes give the main contribution to the asymmetry of the lineshape.

Key words: ZnSe nanoparticles, Raman spectra, macroscopic continuum dielectric model(MCDM), surface modes

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
78.30.Ly (Disordered solids) 71.55.Gs (II-VI semiconductors)