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

Kyoung-Yeon Lee | Zendy; Jung-Ran Lim | Zendy; Heesuk Rho | Zendy; YoungJin Choi | Zendy; Kyoung Jin Choi | Zendy; JaeGwan Park | Zendy

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

Author(s) -

Kyoung-Yeon Lee,

Jung-Ran Lim,

Heesuk Rho,

YoungJin Choi,

Kyoung Jin Choi,

JaeGwan Park

Publication year - 2007

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2806937

Subject(s) - nanowire , phonon , raman spectroscopy , materials science , raman scattering , exciton , crystallinity , nanostructure , nanotechnology , coupling (piping) , condensed matter physics , optoelectronics , optics , physics , composite material

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.open342

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