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Updated: Jan 20, 2026

Gold Nanoparticle Synthesis
Published on: July 10, 2021
Gold and Silver Nanoparticles Functionalized by the Adsorption of Dialkyl Disulfides
Lon A Porter1, David Ji1, Sarah L Westcott1
1Department of Chemistry, University of Houston, Houston, Texas 77204-5641, and Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005.
Abstract:
The formation of three-dimensional self-assembled monolayers (3-D SAMs) generated by the adsorption of n-octadecyl disulfide onto colloidal gold and silver nanoparticles is described. The functionalized nanoparticles were characterized by solubility, transmission electron microscopy, ultraviolet-visible spectroscopy, 1H nuclear magnetic resonance spectroscopy, surface-enhanced Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. On gold nanoparticles, this new functionalization method affords crystalline 3-D SAMs that are indistinct from those prepared by the analogous adsorption of n-octadecanethiol. On silver nanoparticles, however, the films derived from n-octadecyl disulfide appear to be somewhat less crystalline than those prepared similarly from n-octadecanethiol. The origin of this difference is briefly explored and discussed.
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