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1. Effect of nanoscale geometry on molecular conformation: Vibrational sum-frequency generation of alkanethiols on gold nanoparticles

Author

Weeraman, Champika, Yatawara, Achani K., Bordenyuk, Andrey N., and Benderskii, Alexander V.

Subjects
Fourier transform infrared spectroscopy -- Analysis, Gold compounds -- Structure, Gold compounds -- Spectra, Nanoparticles -- Structure, Nanoparticles -- Spectra, Thiols -- Structure, Thiols -- Spectra, Chemistry
Abstract

Nonlinear surface-selective vibrational sum frequency generation (SFG) spectroscopy is applied to characterize the conformation of dodecanethiol on gold nanoparticle surfaces. The results have shown the relation between the nanoscale geometry, such as the surface curvature of spherical gold nanoparticles and the molecular conformation of the chemisorbed dodecanethiol ligand, and have illustrated the utility of the second-order nonlinear SFG spectroscopy as a sensitive probe of the molecular conformation, particularly for surfaces of metallic nanostructures.

Published
2006

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