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(a) UV-Vis spectra of chitosan-algae AgNPs (green) compared to chitosan-algae extract (dashed red). (b) Chitosan-algae AgNPs’ stability after six months. (c) FTIR spectra of chitosan-algae extract (purple) and chitosan-algae AgNPs (red). (d) Bacteria inhibition effect of chitosan-algae AgNPs (biological AgNPs) compared to chitosan-mediated AgNPs, algae-mediated AgNPs, chemical AgNPs, algae-chitosan extract and AgNO3. (*) Error bar. Adapted with permission from ref. [78].
