Molecular-Mediated Single-Electron Devices Operating at Room Temperature

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概要

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• We report the electrical characteristics of gold nanogap devices modified by conjugated molecules with thiol endgroups. Gold nanogap electrodes with a nominal gap distance of between 1–2 nm were fabricated by double oblique deposition from opposite directions. The electrodes were then immersed in 4,4$'$-$ p$-terphenyldithiol (TPDT) solutions to enhance conductance. Using the substrate as a gate electrode, we observed a large Coulomb diamond at room temperature with a charging energy as large as 0.25 eV. The characteristics of the device can be explained on the basis of a multi-metallic-island system. It is considered that ultra small gold islands are formed during the metal deposition and that the molecules bridging metallic islands and electrodes work as tunnel junctions.

• 2006-05-15

著者

• Inokawa Hiroshi

  Ntt Basic Research Laboratories Ntt Corporation

• SUMITOMO Koji

  NTT Basic Research Laboratories

• TORIMITSU Keiichi

  NTT Basic Research Laboratories

• Goto Touichiro

  Ntt Basic Res. Lab. Kanagawa Jpn

• Aoki Takafumi

  Graduate School Of Information Sciences Tohoku University

• Degawa Katsuhiko

  Graduate School Of Information Sciences Tohoku University

• FURUKAWA Kazuaki

  NTT Basic Research Laboratories

• Nakashima Hiroshi

  Ntt Basic Research Laboratories Ntt Corporation

• Inokawa Hiroshi

  NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

• Degawa Katsuhiko

  Graduate School of Information Sciences, Tohoku University, Aoba-yama 05, Sendai 980-8579, Japan

• Sumitomo Koji

  NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

• Torimitsu Keiichi

  NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan

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