Tuning stable and unstable aggregates of gallic acid capped gold nanoparticles using Mg2+ as coordinating agent.


High reducibility of gallic acid allows synthesis of small sized monodisperse gold nanoparticles (GNPs) at ambient temperature (25°C). Mg2+ rapidly interacts with the gallic acid ligands and suppresses the dispersion of GNPs therefore, causing a decrease in UV-vis absorbance intensity, and color change from red to blue. Thus, the colorimetric response of… (More)
DOI: 10.1016/j.jcis.2017.01.050