Recent Advances in Dynamic Light Scattering Sensing Technologies for Food Safety Detection

Abstract:

Dynamic light scattering (DLS) is a technique commonly used in laboratories to obtain the particle size distribution of colloidal solutions by measuring the fluctuations of the scattered light intensity caused by the Brownian motion of particles. In recent years, high-sensitivity DLS sensors constructed using colloidal gold nanoparticles (AuNPs) with super-strong light-scattering capabilities as probes have received widespread attention. This article first elucidates the construction strategy of the AuNP-DLS sensor and analyzes the main factors affecting its detection performance. Then a detailed introduction is given on its current application in food safety detection, and finally the development trend and major challenges faced in this field are discussed.