Supplementary Information Eco-friendly polymer succinate capping on silver nano-particles for enhanced stability: a UV-Vis and electrochemical particle impact study

Abstract

S1 UV-Vis spectrophotometryA solution of AgNO3 and HPC-Suc was exposed to sunlight and the synthesis of the Ag NPs@suc in aqueous solution was monitored periodically (after an exposure time of 15 s, 30 s, 60 s, 90 s, 105 s, 120 s and 25 min) by recording the absorption spectra over a wavelength range of 300-800 nm.Upon exposure to sunlight during an initial period of 15 s to 25 min, the Ag + was reduced to Ag Nps@suc and color of solution changed from light yellow to reddish brown. A single and broad LSPR peak was observed in the range 411-452 nm, confirming the synthesis of Ag Nps (Figure S1) (Mulvaney, 1996). This LSPR absorption peak showed a red shift in λmax and an increase in the intensity of absorption upon the increase of exposure time to sunlight, which suggests that the size of the Ag Nps@suc increases with an increase in exposure or reaction time (Abbas et al., 2015;Ding et al., 2017).