Single electron on a nanodot in a double-barrier tunneling structure observed by noncontact atomic-force spectroscopy.
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.
Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan.
Yasuo
Y
Azuma
Masayuki
M
Kanehara
Toshiharu
T
Teranishi
Yutaka
Y
Majima