Issue 34, 2015

Tetrathiafulvalene-based nanocrystals: site-selective formation, device fabrication, and electrical properties

Abstract

A tetrathiafulvalene (TTF)-based nanocrystal was site-selectively synthesized only in the gap between two electrochemical electrodes by using a nanoscale electrocrystallization method. Furthermore, the nanocrystal was directed to form a bridge between two electrodes using alternating current (AC) electrolysis. The nanocrystal was found to have a one-dimensional π–π stacking structure of TTF molecules, which is the source of its high electrical conductivity. Further, when we reused the two electrochemical electrodes as the source and drain electrodes, a two-terminal device could be readily obtained. The electrical conductivity of the nanocrystal was comparable to that of a partially oxidized bulk crystal. A bottom-gate-type FET was also obtained when the device was fabricated on a silicon substrate. A weak field effect was observed even though the nanocrystal has a metallic nature. The nanoscale electrocrystallization is considered to be applicable to nanocrystal fabrication using various organic molecules. We expect that further enhancement of this method will lead to the development of eco-friendly nanofabrication processes.

Graphical abstract: Tetrathiafulvalene-based nanocrystals: site-selective formation, device fabrication, and electrical properties

Article information

Article type
Paper
Submitted
11 May 2015
Accepted
04 Aug 2015
First published
05 Aug 2015

J. Mater. Chem. C, 2015,3, 8986-8991

Tetrathiafulvalene-based nanocrystals: site-selective formation, device fabrication, and electrical properties

H. Hasegawa, J. Mater. Chem. C, 2015, 3, 8986 DOI: 10.1039/C5TC01322D

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