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Raman spectroscopy of ZnS nanostructures
Author(s) -
Kim J. H.,
Rho H.,
Kim J.,
Choi YJ.,
Park JG.
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.3116
Subject(s) - phonon , materials science , raman spectroscopy , nanowire , wurtzite crystal structure , raman scattering , surface phonon , nanostructure , surface roughness , optics , condensed matter physics , nanotechnology , optoelectronics , composite material , zinc , physics , metallurgy
We report Raman scattering results of wurtzite ZnS nanowires, nanocombs, and nanobelts. The Raman spectrum obtained from ZnS nanowires exhibits first‐order phonon modes at 272, 284, and 350 cm −1 , corresponding to A 1 /E 1 transverse optical, E 2 transverse optical, and A 1 /E 1 longitudinal optical phonons, respectively. Several multiphonon modes are also observed. The longitudinal optical phonon mode varies in wavenumber for nanocombs and nanobelts, indicating that the residual strain varies during the morphological change from ZnS nanowires to nanocombs and ultimately to nanobelts. Interestingly, a surface optical (SO) phonon mode varies in wavenumber depending on the shape and surface roughness of the ZnS nanostructures. The surface modulation wavelengths of the ZnS nanowires, nanocombs, and nanobelts are estimated using the SO phonon dispersion relations and the observed SO phonon wavenumbers. Copyright © 2012 John Wiley & Sons, Ltd.