Potential dependence of the kinetics of thiol self-organization on Au(111) |
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Authors: | M Rohwerder K de Weldige M Stratmann |
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Institution: | (1) Max-Planck-Institut für Eisenforschung, Max-Planck-Strasse 1, D-40237 Düsseldorf, Germany , DE |
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Abstract: | The self-assembly of thiol molecules from ethanolic solution on Au(111) depends significantly on the electrode potential.
Especially at cathodic potentials, chemisorption of thiol molecules and the development of the highly ordered structure are
slowed down significantly. At potentials near the point of zero charge, first a disordered thiol film of already high thiol
density is formed, and then domains of the highly ordered phase develop and grow together. At cathodic potentials, first a
disordered film of very low density of predominant flat adsorbed thiol molecules is formed; the formation of ordered domains
takes time three orders of magnitude longer than at potentials near the point of zero charge.
Received: 27 May 1997 / Accepted: 8 September 1997 |
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Keywords: | Thiols Self-organization Electrochemistry Organic electrolytes Scanning tunneling microscopy |
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