Abstract
Recently, surface-modified metal nanoparticles (NPs) (Ag and Au) have recognized as promising recognition elements for colorimetric sensing of wide variety of chemical species. These features make them as potential candidates in colorimetric recognition of toxic organic molecules in environmental samples. Up to now, tremendous efforts have been made on the functionalization of metal NPs (Ag and Au) and their analytical applications in colorimetric sensing of various toxic organic molecules (pesticides). In this chapter, we focus on the functionalization of metal NPs (Ag and Au), spectral characteristics, and their applications in recognizing toxic organic molecules (pesticides), which can be identified with naked eye. Finally, we describe the future challenges and prospects of surface-modified metal NPs in recognizing pesticides without aid of sophisticated instruments.
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