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Illustration of the mechanism of the detection of influenza virus by biosensor forming a sandwich structure. The red balls represent AuNPs, orange balls iron oxide NPs, and blue/green structures represent quantum dots with antibody (Reprinted by permission of (Lee et al., 2018), Copyright © 2018, Elsevier.). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
