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(A) Ultraviolet and visible spectroscopy absorption spectrum of the chitosan-stabilized silver nanoparticles (CS-AgNPs) (maximum absorbance at 420 nm); (B) transmission electron microscopy image of CS-AgNPs (scale bar, 100 nm); (C) size distribution and (D) zeta potential of chitosan and CS-AgNPs determined by dynamic light scattering.
