Silver nanoparticles were green synthesized using different plant substrates like Phyllanthus niruri, Curcuma angustifolia, utrica dioica etc were characterized with surface plasmon resonance (SPR) ultraviolet spectroscopy (UV–vis). The fresh biologically synthesized silver nanoparticles were turned to colorless, accompanying the broadening and blue shifting of SPR band upon the addition of mercuric ions into the medium and hence paved way towards the detection of mercury and hence led towards the development of cost effective colorimetric sensors. Moreover the larvicidal potential of these green synthesized silver nanoparticles were evaluated as per WHO standards.
Athulya Das, Nandakumar G., Dr. Saritha A., and Dr. Smitha Chandran S., “Development of Highly Sensitive Nano silver based Chemosensors”, International Journal of Applied Engineering Research, vol. 10, 2015.