Additive effect of 1,8-diaminoctane as a bi-functional linker on the two-dimensional array of large gold nanoparticles

Abstract

1,8-Diaminooctane ligand was investigated as a molecular bridging linker to induce a uniform array of gold nanoparticles (GNPs) (larger than 60 nm) via the lateral immobilization of GNPs on amine-functionalized glass substrate. The effects of array time and ligand amounts were optimized to obtain a uniform and two-dimensional (2D) array of large GNPs. With the increase of ligand dosage, the deposition of GNPs on glass substrate progressively increased, finally leading to a densely packed 2D array of GNPs. Excessive dosage of ligand, however, led to a multilayered array of GNPs on glass substrate.