Sers Trace Detection of Dye and Pesticide Based on Pyramidal Ag/Trigonal Petal Nanoarray

Abstract

Surface-Enhanced Raman Scattering (SERS) technology has broad applications in trace molecular detection, environmental monitoring, and food safety due to its ultrahigh sensitivity and molecular specificity. However, the fabrication of SERS substrates with high sensitivity, uniformity, and reusability remains a critical challenge for practical implementation. For this issue, we successfully fabricated Pyramidal Ag/Trigonal Petal (PATP) Nanoarray through a combined approach of self-assembly, plasma etching, and rotational evaporation. The effects of Ag deposition thickness on substrate morphology, nanogap configuration, electromagnetic field enhancement, and SERS intensity were systematically investigated. The PATP substrate demonstrated outstanding performance in sensitivity, uniformity, and reusability, especially for multicomponent mixture detection (such as dye and pesticide molecules). The lowest detectable concentration for tricyclazole was 0.05 ppm, and 0.025 ppm for thiabendazole. These results provide innovative insights into the design of high-performance SERS substrates and establish essential technical support for their practical applications in environmental monitoring and food safety.

Keywords: Surface-enhanced Raman Scattering, plasmonic materials, nanomaterials, trace detection