Transmission line impedance of carbon nanotube thin films for chemical sensing

G. Esen; M. S. Fuhrer; M. Ishigami; E. D. Williams

doi:10.1063/1.2709995

Transmission line impedance of carbon nanotube thin films for chemical sensing

G. Esen, M. S. Fuhrer, M. Ishigami, E. D. Williams

Research output: Contribution to journal › Article › Research › peer-review

16 Citations (Scopus)

Abstract

The authors measure the resistance and frequency-dependent gate capacitance of carbon nanotube (CNT) thin films in ambient, vacuum, and under low pressure (10-6 Torr) analyte environments. They model the CNT film as a RC transmission line and show that changes in the measured capacitance as a function of gate bias and analyte pressure are consistent with changes in the transmission line impedance due to changes in the CNT film resistivity alone; the electrostatic gate capacitance of the CNT film does not depend on gate voltage or chemical analyte adsorption. However, the CNT film resistance is enormously sensitive to low pressure analyte exposure.

Original language	English
Article number	123510
Journal	Applied Physics Letters
Volume	90
Issue number	12
DOIs	https://doi.org/10.1063/1.2709995
Publication status	Published - 30 Mar 2007
Externally published	Yes

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Transmission line impedance of carbon nanotube thin films for chemical sensing

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