Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 48, Issue 2, Pages 224-229Publisher
WILEY
DOI: 10.1002/jrs.5002
Keywords
cadmium sulfide; surface-enhanced Raman scattering; plasmonic silver nanoparticles; multi-phonon
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Funding
- National Natural Science Foundation of China [51272247, 61474103]
- Anhui Province Natural Science Foundation [1408085MF119]
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Resonant Raman scattering is highly desired for material study. It is experimentally not easy to reach the resonant scattering interaction between an incident photon and a material due to the limited available laser wavelengths. In this study, by employing silver plasmonic nanoparticles deposited on glass substrate and by in situ adjusting the cadmium sulfide (CdS) band gap through heat treatment, resonant Raman scattering condition (laser wavelength of 514.5nm) was fully achieved in nanocrystalline CdS thin films. The dramatically enhanced Raman scattering allowed us to in situ monitor the phase transition that occurred during the heat treatment and to quantitatively characterize the fraction of the zincblende (cubic) CdS in the main base of wurtzite (hexagonal) CdS. Raman multi-phonon and the corresponding high-order scattering modes were observed due to the much enhanced surface nanoplasmonic electric field. Copyright (c) 2016 John Wiley & Sons, Ltd.
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