“…In particular, biodegradable and non-toxic chitosan metal nanocomposites have been widely used in biosensors and edible packaging. For example, AgNPs and AuNPs synthesized by Aspergillus spp., Fusarium spp., Bacillus spp., 275 AgNPs and AuNPs synthesized by Bacillus cereus are added to a chitosan solution (2% acetic acid) to form CS–Ag and CS–Au nanocomposites, 276 AgNPs synthesized by Aspergillus fumigatus KIBGE-IB33 are used in the preparation of the silver–chitosan nanocomposite system (AgCNCs), 277 AgNPs synthesized by marine bacteria (MER1) are used in the preparation of polystyrene/silver nanocomposites, 278 and zinc–nickel composite metal nanomaterials synthesized by the extracellular polysaccharides of Rhodotorula mucilaginosa 279 all exhibit good inhibitory effects against bacteria, fungi, or foodborne pathogens. Additionally, MNPs and their functional coatings as food packaging materials can significantly extend the shelf life of foods and fruits.…”