The SERS detection of organophosphorus pesticide ethyl paraoxon and organochlorine pesticidesγ-666 were achieved by the high-density Au-Ag alloy nanourchin as SERS substrate.The Ag nanoparticles were synthesized firstly,then L-dopa was used to reduce the Ag nanoparticles,and ultimately the formation of Au-Ag alloy nanourchin structure.Using this high density tipped structure as the SERS substrate to detect the organophosphorus pesticide ethyl paraoxon and organochlorine pesticidesγ-666 on the portable Raman...
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