Mercaptopyridine Surface-Functionalized CdTe Quantum Dots with Enhanced Raman Scattering Properties
Mercaptopyridine Surface-Functionalized CdTe Quantum Dots with Enhanced Raman Scattering Properties
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DOI：
10.1021/jp077467h
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发表时间：
2008-01
影响因子：
3.7
通讯作者：
Yanfei Wang;Junhu Zhang;Huiying Jia;Minjie Li;Jianbo Zeng;Bai Yang;A. Zhao;Weiqing Xu;J. Lombardi
中科院分区：
文献类型：
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作者：
Yanfei Wang;Junhu Zhang;Huiying Jia;Minjie Li;Jianbo Zeng;Bai Yang;A. Zhao;Weiqing Xu;J. Lombardi
我们报道了直径为3 nm的CdTe量子点可以产生增强的拉曼散射。吸附在CdTe量子点上的4-巯基吡啶（4-Mpy）的拉曼信号比体相4-Mpy增强了10 4倍。基于CdTe量子点的增强现象也提供了新的见解，以帮助理解增强机制。电荷转移机制是最有可能负责观察到的增强，因为等离子体共振被排除。这项研究指出了使用量子点的可能性，在一些重要的实际系统中的化学吸附，如量子点作为纳米级的积木和生物成像标记的应用。
We report that 3 nm diameter CdTe quantum dots can generate enhanced Raman scattering. The Raman signal of 4-mercaptopyridine (4-Mpy) adsorbed on CdTe quantum dots shows a 104 enhancement compared with that of bulk 4-Mpy. The enhanced phenomenon based on CdTe quantum dots also provides new insight to help understand the enhancement mechanism. A charge-transfer mechanism is most likely responsible for the observed enhancement, since plasmon resonances are ruled out. This study points to the possibility of using quantum dots, with chemisorption in some important practical systems, such as the application of quantum dots as nanosized building blocks and markers in biological imaging.