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(A) Gum exuded from the stem of the cashew (Inset: cashew gum purified); (B) UV-Vis absorption spectrum of the cashew gum-based AgNPs; the arrow indicates the maximum absorbance at 420 nm (Inset: Photography comparing the color of the solutions of AgNO3 and AgNPs); (C) Histogram showing the particle size distribution (4.38 ± 0.07 nm) measured by Dynamic Light Scattering (DLS); (D) Transmission Electron Microscopy (TEM) image of cashew gum-based AgNPs (scale bar 50 nm).
