Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1678387 | Ultramicroscopy | 2008 | 6 Pages |
Abstract
Stretch lengths of pure gold mono-atomic wires have been studied recently with an electrochemical scanning tunneling microscope (STM). Here, we will report a study of stretch lengths of gold mono-atomic wires with and without 1,6-hexanedithiol (HDT) using the STM break-junction method. First, the stretch length was measured as a function of electrode potentials of a bare Au(1Â 1Â 1) substrate and a gold STM tip in a 0.1Â M NaClO4 aqueous solution. Second, a self-assembled monolayer (SAM) was fabricated on an Au(1Â 1Â 1) substrate by dipping the substrate into a 1Â mM HDT ethanol solution. At last, we measured the stretch length of gold mono-atomic wires on a substrate covered with the SAM in place of the bare Au(1Â 1Â 1) substrate. We compared the electrode potential dependence of the stretch lengths of gold mono-atomic wires covered with and without HDT. We will discuss the effect of the electrode potential on the stretch lengths by taking account of electrocapillarity of gold mono-atomic wires.
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Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Jian Sun, Uichi Akiba, Masamichi Fujihira,