CdTe QDs/Au NRs的SERS及光诱导电荷转移研究

Investigating on the Improved Charge Transfer for SERS Application Based on CdTe QDs/Au NRs

控制和利用半导体基底的荧光背景是解决半导体纳米材料应用在表面增强拉曼(SERS)领域的关键问题。该研究通过将具有高荧光背景的碲化镉量子点(CdTe QDs)与贵金属金纳米棒(Au NRs)纳米材料复合,依赖于光激发下CdTe QDs与Au NRs之间的电荷转移,获得了兼具多功能特性(例如表面增强拉曼散射和光催化)的纳米复合材料。在该研究中,将染料分子亚甲基蓝(MB)作为探针分子,CdTe QDs/Au NRs纳米复合材料的之间的电荷转移降低了CdTe QDs的荧光背景,展现出良好的SERS增强性能。

Controlling and exploiting the fluorescence background of semiconductor substrates is a key issue in addressing the application of semiconductor nanomaterials in the field of surface-enhanced Raman(SERS).In this work,nanocomposites with both multifunctional properties(e.g.,surface-enhanced Raman scattering and photocatalysis)were obtained by compounding cadmium telluride quantum dots(CdTe QDs)with noble metal gold nanorods(Au NRs)nanomaterials.In this study,the dye molecule methylene blue(MB)was used as a probe molecule,and the charge transfer between the CdTe QDs/Au NRs nanocomposites reduced the fluorescence background of CdTe QDs and exhibited good SERS-enhanced properties.