Single electron charge sensitivity of liquid-gated carbon nanotube transistors

Tal Sharf; Neng-Ping Wang; Joshua W Kevek; Morgan A Brown; Heather Wilson; Stefan Heinze; Ethan D Minot

doi:10.1021/nl403983u

Single electron charge sensitivity of liquid-gated carbon nanotube transistors

Nano Lett. 2014 Sep 10;14(9):4925-30. doi: 10.1021/nl403983u. Epub 2014 Aug 29.

Authors

Tal Sharf¹, Neng-Ping Wang, Joshua W Kevek, Morgan A Brown, Heather Wilson, Stefan Heinze, Ethan D Minot

Affiliation

¹ Department of Physics, Oregon State University , Corvallis, Oregon 97331-6507, United States.

PMID: 25160798
DOI: 10.1021/nl403983u

Abstract

Random telegraph signals corresponding to activated charge traps were observed with liquid-gated CNT FETs. The high signal-to-noise ratio that we observe demonstrates that single electron charge sensing is possible with CNT FETs in liquids at room temperature. We have characterized the gate-voltage dependence of the random telegraph signals and compared to theoretical predictions. The gate-voltage dependence clearly identifies the sign of the activated trapped charge.

Keywords: Carbon nanotube; charge traps; liquid-gate; low-frequency noise; random telegraph signals; single charge.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.