East China Jiaotong University
Surface-Enhanced Raman Spectroscopy for Trace-Level Dimethoate Detection Based on a Silver Nanoparticle–Probe–Smooth Gold Film Substrate
In this paper, we demonstrate a sensitive surface-enhanced Raman spectroscopy (SERS) substrate for trace dimethoate detection. The substrate is composed of Ag nanoparticle/probe/smooth Au film stack configuration. The nanogap formed by an Ag nanoparticle and a macroscopically flat Au film is one kind of “hot site” which will dramatically increase the total “hot spots” number.
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