3D Porous Silicon Carbide SERS Microfluidic Chip for Pesticide Residue Detection

Abstract

In order to solve the insufficiency of traditional pesticide residue detection methods, such as limited detection sensitivity, high time and labor costs, inability to monitor in real time, and easy interference of detection results, a study that combines a microfluidic platform with surface-enhanced Raman scattering (SERS) technology to enable rapid detection of continuous trace amounts is proposed. The microfluidic SERS chip utilizes porous silicon carbide impregnated with silver nanoparticles to construct a high-performance SERS substrate. The three-dimensional structure of porous silicon carbide gives the SERS substrate excellent enhancement performance, with a detection limit as low as 10^–12 M. Its high sensitivity and environmental friendliness makes it a promising tool for biochemical analysis and detection. The porous silicon carbide SERS substrate exhibits a high enhancement factor (EF) of 2.05 × 10¹³ for the R6G solution at 1506 cm^–1.