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Updated: Aug 11, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Single electron on a nanodot in a double-barrier tunneling structure observed by noncontact atomic-force spectroscopy
Yasuo Azuma1, Masayuki Kanehara, Toshiharu Teranishi
1Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan.
Abstract:
A single electron has been observed on a nanodot in a double-barrier tunneling structure by noncontact atomic-force microscopy at fixed separation. Frequency shift-voltage dependence of an Au-coated cantilever/vacuum/1-decanethiol protected Au nanodot/1-octanethiol self-assembled monolayer/Au substrate structure deviates from the theoretical parabolic curve, which is attributed to the change in the number of quantized electrons on the Au nanodot caused by the Coulomb blockade phenomena.

