It is here considered that desirable features for a synthesis, and yet challenging features to combine, are to lead to small size NPs, in a relatively timely approach, through a robust process and ideally in low viscosity solvents to facilitate the use and processing of the Au NPs . An overview of the samples discussed and the results obtained using different amounts of ethanol, glycerol and [ethanol+glycerol] mixtures are summarized in Table . UV-vis spectra are reported in Figure with further analysis in Figure and. The corresponding STEM characterization and size distributions are provided in Figures .