动态光散射传感器在食品安全检测中的应用进展

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

摘要:

动态光散射（dynamic light scattering，DLS）是通过测量由颗粒布朗运动引起的散射光强度起伏变化规律以获得胶体溶液粒径分布的一项实验室常用技术。近年来，以光散射能力超强的金纳米颗粒（gold nanoparticles，AuNPs）为探针，构建的高灵敏AuNP-DLS传感器受到广泛关注。作者首先阐述了AuNP-DLS传感器的构建策略，分析了影响其检测性能的主要因素，然后详细介绍了其在食品安全检测方面的应用现状，最后探讨了该领域的发展趋势和面临的主要挑战。

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.