Selective interaction between phytomediated anionic silver nanoparticles and mercury leading to amalgam formation enables highly sensitive, colorimetric and memristor-based detection of mercury.

Presently, nanotechnology is being foreseen to play an important role in developing analytical assays for the detection of pollutants like mercury (Hg). In this study, Kokum fruit mediated silver nanoparticles (AgNPs) were differentially centrifuged to prepare anionic, monodispersed AgNPs to develop a highly sensitive, colorimetric and memristor-based assay for detection of Hg in water samples. The investigation of the highly selective reaction between AgNPs and Hg using HAADF-STEM images and EDS spectrum indicated the amalgam formation through etching and under potential deposition which resulted in a visible color change from brown to colorless, change in SPR intensity and also change in memristive switching like property of AgNPs.

Garcinia indica mediated biogenic synthesis of silver nanoparticles with antibacterial and antioxidant activities.

This reports the optimization of various parameters for biogenic synthesis of Silver nanoparticles using fruit extract of Garcinia indica, popularly known as Kokum. For optimization, the effects of various parameters such as concentration of AgNO, ratio of AgNO to extract, pH, incubation temperature and time were varied and studied for their effect on synthesis. 1.