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A label‐free and novel surface‐enhanced Raman scattering (SERS) method has been studied to rapidly detect common fish pathogenic bacteria (Escherichia coli, Vibrio anguillarum, Vibrio harveyi, Edwardsiella piscicida, and Pseudomonas plecoglossicida). The marriage of magnetic nanospheres (Fe3O4) with polyethylenimine (PEI) could trigger surface charge modifications of Fe3O4, making it effective to...
This paper reports a new way to fast produce surface‐enhanced Raman scattering (SERS) substrate within 1 s by in situ photoreduction of AgNO3 and chemical compound containing mercapto group, such as para‐aminothiophenol (PATP), dithizone, and 4‐mercaptobenzoic acid on filter paper. Ag nanoparticles (Ag‐NPs) would form in the area where the laser spot was focused by Raman instrument. In this work,...
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