Chain length effect of diamine linkers on the self-assembled structure of large gold nanoparticles over glass substrates

► A facile method for turning the packing density of gold nanoparticles (GNPs) over glass substrates. ► The degree of GNP aggregation was increased with rising chain length of diamines. ► C-8 diamines produced the homogeneous 2-dimensional array of GNPs over glass substrates.