Chemically and Electrochemically Induced Surface Reconstruction of Au Single Crystal Studied by the Nonlinear Optics

Abstract

Abstract:

The rotational anisotropy of the optical second harmonic generation (SHG) from Au (Ⅲ) surface was studied as a measure of the surface reconstruction before and after the self-assembly (SA) of thiols on the gold facet. The SA reaction was undertaken on the √3×23 reconstructed Au(Ⅲ) surface which was achieved consistently throughout the reacition by the electrochemical potential control in an aqueous HCIO₄, solution. The polarization dependence of the anisotropic SHG pattern showed that the initial surface symmetry of the reconstructed √3×23 structure was neither settled nor deformed into the 1×1 structure by the monolayer deposition of SA-overcoat which was expected to show √3×√3 hexagonal structure.

Key words: Surface reconstruction, Self-assembly, SHG

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Baba R., Mochizuki H., Kozakai T., Fujishima A.. Chemically and Electrochemically Induced Surface Reconstruction of Au Single Crystal Studied by the Nonlinear Optics[J]. Chem. J. Chinese Universities, 1995, 16(S1): 103.

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Chemically and Electrochemically Induced Surface Reconstruction of Au Single Crystal Studied by the Nonlinear Optics

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