The patterned Au oxide layer formation on Au surfaces by F2 laser irradiation under the atmospheric conditions

Abstract

The patterned Au oxide layer on the Au plate surface was produced by F2 laser irradiation under atmospheric conditions. The Au oxide formation after F2 laser irradiation was confirmed by X-ray photoelectron spectroscopy with the formation of a pair of peaks of Au 4f at 85.4 and 89.0 eV. The stability of Au oxide in air, vacuum, ethanol, H2O, and hexane was examined. The Au oxide in the vacuum condition shows a much longer lifetime than in air, and hexane shows a long lifetime comparable in air. As a possible application of the Au oxide pattern on Au, we demonstrated the patterning of the self-assembled monolayer on the Au surface by controlling the chemical reaction of Au and disulfide with the Au oxide pattern. It is expected that this easy formation process of the Au oxide layer under the atmospheric condition contributes to the advances of investigation and application of the unique properties of Au oxide.