Electrochemical stability of self-assembled monolayers on nanoporous Au |
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Authors: | Hakamada Masataka Takahashi Masaki Furukawa Toshiyuki Tajima Kazuki Yoshimura Kazuki Chino Yasumasa Mabuchi Mamoru |
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Affiliation: | Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Kyoto, Japan. hakamada.masataka.3x@kyoto-u.ac.jp |
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Abstract: | Desorption of thiolate self-assembled monolayers (SAMs) seriously limits the fabrication of thiol-based devices. Here we demonstrate that nanoporous Au produced by dealloying Au-Ag alloys exhibits high electrochemical stability against thiolate desorption. Nanoporous Au has many defective sites, lattice strain and residual Ag on the ligament surface. First-principles calculations indicate that these surface aspects increase the binding energy between a SAM and the surface of nanoporous Au. |
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