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Mechanically activated switching of Si-based single-molecule junction as imaged with three-dimensional dynamic probe

Author

Listed:
  • Miki Nakamura

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Shoji Yoshida

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Tomoki Katayama

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Atsushi Taninaka

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Yutaka Mera

    (Shiga University of Medical Science)

  • Susumu Okada

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Osamu Takeuchi

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

  • Hidemi Shigekawa

    (Faculty of Pure and Applied Sciences, University of Tsukuba)

Abstract

Understanding and extracting the full functions of single-molecule characteristics are key factors in the development of future device technologies, as well as in basic research on molecular electronics. Here we report a new methodology for realizing a three-dimensional (3D) dynamic probe of single-molecule conductance, which enables the elaborate 3D analysis of the conformational effect on molecular electronics, by the formation of a Si/single molecule/Si structure using scanning tunnelling microscopy (STM). The formation of robust covalent bonds between a molecule and Si electrodes, together with STM-related techniques, enables the stable and repeated control of the conformational modulation of the molecule. By 3D imaging of the conformational effect on a 1,4-diethynylbenzene molecule, a binary change in conductance with hysteresis is observed for the first time, which is considered to originate from a mechanically activated conformational change.

Suggested Citation

  • Miki Nakamura & Shoji Yoshida & Tomoki Katayama & Atsushi Taninaka & Yutaka Mera & Susumu Okada & Osamu Takeuchi & Hidemi Shigekawa, 2015. "Mechanically activated switching of Si-based single-molecule junction as imaged with three-dimensional dynamic probe," Nature Communications, Nature, vol. 6(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9465
    DOI: 10.1038/ncomms9465
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