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UV–vis spectra of biosynthesized AgNPs synthesized from 1 (A) Chaetoceros sp., 1(B) Skeletonema sp., and 1(C) Thalssiosira sp. (The results show the stability studies for a period of 2 months. AgNP synthesized from Chaetoceros sp., is highly stable as reflected by UV–vis spectra whereas other biosynthesized AgNPs form aggregates showing a major shift in peak to the longer region of wavelength).
