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The study on the stability of silver nanoparticles by using simple spectrophotometric method

Author(s): Gunjan Kodwani, Farah Surti, BalaprasadAnkamwar

Silver nanoparticles using different concentrations of AgNO3 precursor were successfully synthesized using sodium borohydride as the reducing and capping agent. This study investigated the stability of silver nanoparticles at two different silver nitrate concentrations using a simple UV-Vis Spectroscopic technique. The UV-Vis spectroscopy confirmed the formation of silver nanoparticles by exhibiting the typical surface plasmon absorption maxima ranging from 390-408 nm for higher (10-3M) AgNO3 concentration, whereas for lower (10-4M) AgNO3 concentrations, we observed variation in the SPR band which can be attributed to aggregation of Ag NPs. During this study, we concluded that nanoparticles at lower AgNO3 concentration were much more stable than nanoparticles at higher AgNO3 concentration. The synthesized Ag NPs may have many potential applications such as antibacterial, antifungal, catalyst and sensor etc.

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