This work demonstrated the effect of charge transfer (CT) induced by metal surface plasmon resonance (SPR) on surface-enhanced Raman scattering (SERS). We designed an Ag-ZnSe nanostructure and introduced p-aminothiophenol (PATP) molecules to form an Ag-ZnSe-PATP system. The proposed method compensates for the CT difficulty in wide-band-gap semiconductors, which was initiated by the SPR of Ag. The Raman intensity is enhanced differently depending on the action of excitation light of different wavelengths. The concept of the CT degree was introduced to analyze this intriguing phenomenon. The system constructed in this work combines the electromagnetic enhancement mechanism and the chemical enhancement mechanism, which helps further understand the SERS mechanism and provides important references for SERS research on wide-band-gap semiconductors.

这项工作证明了金属表面等离振子共振（SPR）诱导的电荷转移（CT）对表面增强拉曼散射（SERS）的影响。我们设计了一个Ag-ZnSe纳米结构，并引入了对氨基硫酚（PATP）分子以形成Ag-ZnSe-PATP系统。所提出的方法弥补了由Ag的SPR引发的宽带隙半导体的CT困难。拉曼强度根据不同波长的激发光的作用而不同地增强。引入CT度的概念来分析这种有趣的现象。本文构建的系统结合了电磁增强机制和化学增强机制，有助于进一步理解SERS机制，为宽带隙半导体SERS研究提供重要参考。