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A dual-channel ratiometric method is presented for improved colorimetric and fluorometric visualization of the fungicide cymoxanil (CYM). It is based on the use of a mixture of dually emitting carbon dots (CDs) and citrate-stabilized silver nanoparticles (AgNPs). The CDs, under photoexcitation at 350 nm, display dual (blue and green) fluorescence, with peaks at 435 and 520 nm. In mixed aqueous suspension...
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