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

Nakamura, Miki  ,  Yoshida, Shoji  ,  Katayama, Tomoki  ,  Taninaka, Atsushi  ,  Mera, Yutaka  ,  Okada, Susumu  ,  Takeuchi, Osamu  ,  Shigekawa, Hidemi

6p.8465 , 2015-10 , Nature Publishing Group
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.

Number of accesses :  

Other information