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We report herein the synthesis of glutathione-stabilized silver nanoparticles (GSH-Ag NPs) in water media and colorimetric assay of Ni 2+ with GSH-Ag NPs. GSH-Ag NPs were characterized by IR spectroscopy, ultraviolet-visible spectroscopy (UV–vis), transmission electron microscopy (TEM). The freshly synthesized GSH-Ag NPs are yellow in color due to the intense surface plasmon absorption band...
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