Charge-Sensitive Surface Optical Phonon in CdS Quantum Dots Studied by Resonant Raman Spectroscopy
Charge-Sensitive Surface Optical Phonon in CdS Quantum Dots Studied by Resonant Raman Spectroscopy
复制标题
通过共振拉曼光谱研究 CdS 量子点中的电荷敏感表面光学声子
DOI：
10.1021/jp509862k
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发表时间：
2014-12
影响因子：
3.7
通讯作者：
Li Can
中科院分区：
文献类型：
--
作者：
Wu Yongkuan;Jin Shaoqing;Ye Yun;Wang Shengyang;Feng Zhaochi;Li Can
量子点的表面性质在很大程度上影响其在光电子器件和光催化方面的性能，因此对量子点表面性质的探测具有重要意义。本文利用共振拉曼光谱研究了硫化镉量子点的表面光学声子。实验中发现，随着量子点尺寸的减小，Cd S量子点的SO声子峰强度增大，但周围介质的介电常数对SO声子峰的影响并不明显。同时，改变CdS量子点的表面配体或激发功率/波长时，SO声子峰的强度发生了明显的变化。此外，铂催化剂的负载严重削弱了SO声子峰的强度。这些实验结果可以用电荷敏感的表面光学声子模型来解释。
The probe of surface properties of quantum dots (QDs) is of great importance as the surface properties of QDs greatly influence their performance in photoelectronic devices and photocatalysis. In this work, resonant Raman spectroscopy was used to study the surface optical (SO) phonon of CdS QDs. It was found that the intensity of SO phonon peak of CdS QDs increased as the size of the QDs decreased, but the dielectric constant of the surrounding media, which showed striking impacts on SO phonon peak in previous publications, has no visible influence in our experiments. Meanwhile, the intensity of SO phonon peak changes obviously when the surface ligands of CdS QDs or the excitation power/wavelength is changed. Besides, the loading of platinum catalyst seriously weakens the intensity of SO phonon peak. These experimental results can be interpreted with a charge-sensitive surface optical phonon model.
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影响因子：
8.6
作者：
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通讯作者：
Kambhampati, Patanjali
影响因子：
18.3
作者：
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S. Sahoo;S. Dhara;A. Arora;R. Krishnan;P. Chandramohan;M. P. Srinivasan
影响因子：
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作者：
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通讯作者：
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