Raman selection rule for surface optical phonons in ZnS nanobelts

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chih-Hsiang Ho
  • Purushothaman Varadhan
  • Hsin-Hua Wang
  • Cheng-Ying Chen
  • Xiaosheng Fang

Detail(s)

Original languageEnglish
Pages (from-to)5954-5958
Journal / PublicationNanoscale
Volume8
Issue number11
Online published18 Feb 2016
Publication statusPublished - 21 Mar 2016
Externally publishedYes

Abstract

We report Raman scattering results for high-quality wurtzite ZnS nanobelts (NBs) grown by chemical vapor deposition. In the Raman spectrum, the ensembles of ZnS NBs exhibit first order phonon modes at 274 cm-1 and 350 cm-1 , corresponding to A1/E1 transverse optical and A1/E1 longitudinal optical phonons, in addition to a strong surface optical (SO) phonon mode at 329 cm-1. The existence of the SO band is confirmed by its shift with different surrounding dielectric media. Polarization dependent Raman spectra were recorded on a single ZnS NB and for the first time a SO phonon band has been detected on a single nanobelt. Different selection rules for the SO phonon mode are shown from their corresponding E1/A1 phonon modes, and were attributed to the breaking of anisotropic translational symmetry on the NB surface.

Citation Format(s)

Raman selection rule for surface optical phonons in ZnS nanobelts. / Ho, Chih-Hsiang; Varadhan, Purushothaman; Wang, Hsin-Hua; Chen, Cheng-Ying; Fang, Xiaosheng; He, Jr-Hau.

In: Nanoscale, Vol. 8, No. 11, 21.03.2016, p. 5954-5958.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review