Raman spectra of ZnSe nanoparticles synthesized by thermal evaporation method |
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Authors: | An Hui-Zhi Zhao Qing and Du Wei-Min |
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Institution: | Institute of Modern Optics, School of Physics, Peking University, Beijing 100871, China |
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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. |
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Keywords: | ZnSe nanoparticles Raman spectra macroscopic continuum dielectric model(MCDM) surface modes |
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