The size of the NPs is improved towards smaller size when [ethanol+glycerol] mixtures with lower total amount of alcohols are used, see Figure . Using 10 v.% ethanol leads to NPs with a large size distribution (8.0 ± 6.8 nm). Using only 2 v.% glycerol leads to relatively large NPs after 24 hours (11.7 ± 3.6 nm). In contrast using .% ethanol + 2 v.% glycerol] lead to smaller NPs (5.5 ± 1.5 nm). The total amount of alcohol can even be reduced to 5 v.% to still lead to smaller size NPs (5.5 ± 1.4 nm). Overall the results illustrate the benefits of mixing alcohols to: (1) perform the synthesis in less viscous media; (2) develop faster and more robust synthesis; (3) optimize the total amount of alcohols towards lower values; to (4) obtain small(er) size NPs. Overall the concept of mixing alcohols as source of reducing agents allows the development of more sustainable syntheses requiring fewer chemicals to yet lead to smaller NPs.