Carbon nanotube based sensors and fluctuation enhanced sensing

Physica Status Solidi B 7, 1217 - 1221 (2010)

Carbon nanotube based sensors and fluctuation enhanced sensing

A. Kukovecz, D. Molnár, K. Kordás, Z. Gingl, H. Moilanen, R. Mingesz, Z. Kónya, J. Mäklin, N. Halonen, G. Tóth, H. Haspel, P. Heszler, M. Mohl, A. Sápi, S. Roth, R. Vajtai, P.M. Ajayan, Y. Pouillon, A. Rubio, I. Kiricsi

An inkjet-printed thin film of multi-wall carbon nanotubes is used as a gas sensor in a four-probe measurement setup. The novelty of the approach is that the sensor information is extracted from the noise of the dc resistance data using Fluctuation Enhanced Sensing (FES). We investigate the effects of measurement duration, gate voltage and frequency window on the chemical selectivity of the MWCNT-FES sensor. The selectivity of the device is superior to those of conventional gas sensors, and preliminary experiments indicate that it may also be possible to extract quantitative information from the noise.

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http://dx.doi.org/10.1002/pssc.200982973

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