Recent Application and Future Prospects of Nanoparticles-Based Colorimetric Sensors for Residual Pesticides Detection

All over the world, there is consistent and regular use of pesticides, resulting in their accumulation in food, water, and soil. Numerous significant problems have been connected to pesticide exposure, including cancer, pregnancy, various other adverse health effects, and birth defects. As a result, there is a squeezing requirement for quick and easy methods to find pesticides in foodstuffs to protect human health. Nanoparticle-based colorimetric diagnostics have received a lot of interest for rapid and efficient pesticide residue detection. Pesticides can be detected with the naked eye due to a chemical interaction between the analytes and the surface of nanoparticles, which causes periodic optical alterations. When metal nanoparticles cluster show various linear and non-linear optical characteristics in the visible spectral range, Localized Surface Plasmon Resonance, or LSPR, is the term used to describe this phenomenon. These methodologies are used for on-site detection and are both precise and cost-effective. Furthermore, the modification and functionalization of nanoparticles have significantly increased the selectivity and sensitivity of such assays. We summarised and presented the most current uses of SMNPs for the identification of leftover pesticides in this chapter.