Resonant Raman scattering in nanocrystalline thin CdS film
Resonant Raman scattering in nanocrystalline thin CdS film
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纳米晶 CdS 薄膜中的共振拉曼散射
DOI：
10.1002/jrs.5002
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发表时间：
2017-02-01
影响因子：
2.5
通讯作者：
Wang, Deliang
中科院分区：
文献类型：
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作者：
Saleem, Muhammad Farooq;Zhang, Hua;Wang, Deliang
共振拉曼散射是材料研究中非常需要的。由于可用激光波长有限，在实验上很难实现入射光子与材料之间的共振散射相互作用。在这项研究中，采用银等离子体纳米粒子沉积在玻璃基板上，并通过原位调节硫化镉（CdS）的带隙，通过热处理，共振拉曼散射条件（激光波长为514.5 nm）完全实现在纳米CdS薄膜。显着增强的拉曼散射使我们能够在原位监测的相变过程中发生的热处理和定量表征的分数的锌（立方）CdS的纤锌矿（六方）CdS的主基地。由于表面纳米等离子体激元电场的增强，观察到了拉曼多声子和相应的高阶散射模。版权所有© 2016约翰威利父子有限公司.
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 514.5 nm) 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 © 2016 John Wiley & Sons, Ltd.