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Functionalized Gold Nanoparticles Enable Colorimetric Biosensing of Pesticides for Advanced Applications: Detection of Pesticides Using Functionalized Gold Nanoparticles
Abstract
The growing use of pesticides in agriculture poses significant risks to food safety and environmental health. Traditional detection methods are accurate but require complex instruments and skilled personnel. Biosensing approaches using functionalized gold nanoparticles (AuNPs) have emerged as rapid, cost-effective, and portable alternatives. This mini-review explores the synthesis, surface modification, and characterization of AuNPs, emphasizing their surface plasmon resonance (SPR) properties for colorimetric biosensing. Pesticide exposure induces aggregation of ligand-functionalized AuNPs, leading to visible color changes detectable without advanced equipment. Recent studies demonstrate the successful detection of pesticides such as paraquat, glyphosate, and deltamethrin across diverse matrices. These biosensors offer advantages like visual output, simplicity, and fast response. Despite some limitations, functionalized AuNPs show strong potential for developing efficient biosensing systems, supporting safer agriculture and environmental monitoring.
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