| Abstract
| - We report that 3 nm diameter CdTe quantum dots can generate enhanced Raman scattering. The Ramansignal of 4-mercaptopyridine (4-Mpy) adsorbed on CdTe quantum dots shows a 104 enhancement comparedwith that of bulk 4-Mpy. The enhanced phenomenon based on CdTe quantum dots also provides new insightto help understand the enhancement mechanism. A charge-transfer mechanism is most likely responsible forthe observed enhancement, since plasmon resonances are ruled out. This study points to the possibility ofusing quantum dots, with chemisorption in some important practical systems, such as the application of quantumdots as nanosized building blocks and markers in biological imaging.
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