| Abstract
| - Gold nanoparticles passivated with symmetrical and unsymmetrical dialkyl sulfides (H21C10SC10H21and H37C18SC10H21) have been synthesized via the borohydride reduction of HAuCl4 and characterized by1H NMR, FTIR, UV-vis, Auger Electron, XPS spectroscopies, and TEM. Under equivalent conditions offormation, the size and polydispersity of the gold cores obtained was greater for dialkyl sulfide ligands(d(C10SC10) = 5.3 ± 0.8 nm; d(C18SC10) = 6.3 ± 1.1 nm) than alkanethiol ligands (d(C10H22SH) = 2.2 ±0.1 nm). Edge-edge interparticle spacing of 2-D arrays of the nanoparticles is found to be dependent onthe length of the longest alkyl chain passivating the nanoparticles and is independent of the asymmetryof the alkyl chains in the dialkyl sulfide.
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