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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Evolution of optical phonons in CdS nanowires, nanobelts, and nanosheets

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Title
Evolution of optical phonons in CdS nanowires, nanobelts, and nanosheets
Author
Lee, K.-Y.Lim, J.-R.Rho, H.Choi, Kyoung JinPark, J.-G.
Keywords
POLARIZED PHOTOLUMINESCENCE; LATTICE CONTRACTION; RAMAN-SCATTERING; ROOM-TEMPERATURE; CADMIUM-SULFIDE; RESONANCE RAMAN; NANOCRYSTALS
Issue Date
2007-11
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.91, no.20, pp. -
Abstract
We report Raman scattering from single and ensemble CdS nanowires, nanobelts, and nanosheets. The Raman spectra of nanobelts and nanosheets are notably different from those of nanowires, exhibiting a strong enhancement of the multiphonon response. Moreover, the first-order longitudinal optical (LO) phonon energy systematically increases with increasing lateral size from nanowires to nanobelts, and to nanosheets. These results suggest that the optical phonons in the CdS nanostructures are influenced by strain, crystallinity, and exciton-LO phonon coupling.
URI
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DOI
10.1063/1.2806937
ISSN
0003-6951
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MSE_Journal Papers
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