Abstract
Emergence of drug resistant strains is being a matter of concern globally. While a number of antibiotics are failing in curing especially nosocomial infections, it is imperative to harness alternative sources of antimicrobials. Noble metal nanoparticles like silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) exhibit unique properties, which are different from their bulk counterparts and hence have diverse applications including as antimicrobial entities. Bimetallic (Ag-Au) could exert better effects in a synergistic manner. A number of protocols including physicochemical and green chemical approaches are developed for the synthesis of AgNPs, AuNPs, and bimetallic nanoparticles (Ag-Au NPs) with tuned properties relevant to nanoantibiotics. This chapter focuses on AgNPs, AuNPs, and Ag-Au NPs synthesized using different routes and their applications as antimicrobial agents against various microorganisms.
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