Su-PS4-Sy83
Log Number: P101
Abstract Submitted to the NT'02-Logo NANOTUBE'02 Workshop:

Chemically modified carbon nanotube networks for gas sensing

U. Schlecht1, I. Besnard2, T. Vossmeyer2, A. Yasuda2, K. Balasubramanian1, M. Burghard1, K. Kern1

1 Max-Planck-Institute for Solid State Research, 70569 Stuttgart, Germany
2 Sony International (Europe) GmbH, Materials Science Laboratories, 70327 Stuttgart, Germany
Contact e-mail: u.schlecht@fkf.mpg.de

We study the gas sensing behavior of thin networks of single walled carbon nanotubes (SWCNTs) contacted with 10-mm interdigitated electrode structures. These networks showed high sensitivity to ammonia and hydrogen at concentrations as low as 1 ppm. In order to approach responses that are useful for technical applications, the nanotubes were chemically modified via evaporation of various thin noble metals on top of the SWCNT-networks. The modified structure of the SWCNT/metal-assemblies was investigated by atomic force microscopy. Furthermore the sensor response was detected as a function of gas-concentration.

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