The ethanol sensors made from

Vladimir M. Aroutiounian , Valeri M. Arakelyan , Gohar E. Shahnazaryan , Mikayel S. Aleksanyan , Klara Hernadi , Zoltan Nemeth , Peter Berki , Zsuzsanna Papa , Zsolt Toth , Laszlo Forro

Abstract

Thin film ethanol sensors made from a-Fe2O3 decorated with multiwall carbon nanotubes (MWCNTs) were manufactured by the electron beam deposition method. The morphology of the decorated a-Fe2O3/MWCNTs (25:1 weight ratios) nanocomposite powder was investigated using the scanning electron microscopy and X-ray diffraction techniques. The thickness of thin films has been determined from ellipsometric measurements. The response of manufactured sensors was investigated at different temperatures of the sensor work body and concentration of gas vapors. Good response of prepared sensors to ethanol vapors already at work body temperature of 150oC was shown.

Key Words

gas sensor; Fe2O3; carbon nanotubes; response; ethanol

Address

Vladimir M. Aroutiounian, Valeri M. Arakelyan, Gohar E. Shahnazaryan, Mikayel S. Aleksanyan — Centres of Semiconductor Devices and Nanotechnologies, Yerevan State University, 1 Alek Manookian St., 0025 Yerevan, Armenia
Klara Hernadi, Zoltan Nemeth, Peter Berki — Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, Szeged H-6720, Hungary
Zsuzsanna Papa, Zsolt Toth — Department of Optics and Quantum Electronics, University of Szeged, Dom tér 9, Szeged H-6720, Hungary
Laszlo Forro — Laboratory of Physics of Complex Matter, Ecole Polytechnique Federale de Lausanne, Lausanne, CH-1015, Switzerland

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