| Numéro |
J. Phys. IV France
Volume 129, October 2005
|
|
|---|---|---|
| Page(s) | 121 - 124 | |
| DOI | https://doi.org/10.1051/jp4:2005129026 | |
J. Phys. IV France 129 (2005) 121-124
DOI: 10.1051/jp4:2005129026
Polyaniline thin films as a toxic gas sensors in SAW system*
W.P. Jakubik, M. Urbanczyk, E. Maciak, T. Pustelny1 and A. Stolarczyk21 Institute of Physics, Silesian University of Technology, 44-100 Gliwice, Poland
2 Institute of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
Abstract
Presented here are the preliminary results concerning an
investigations of thin films of polyaniline (
100 nm) as a toxic gas
sensors in a Surface Acoustic Wave system. The investigations were performed
with different concentrations of the following toxic gases: NO2,
SO2, CO, H2S and hydrogen in synthetic dry air. These thin films
were made by vacuum deposition technique and formed in one of the dual delay
line systems on a LiNbO3 Y-cut Z-propagation substrate, while the
other serves as a reference, permitting an easy detection of the arising
differential frequency 
f. This frequency, depending on the
operating frequency modes, is in the range of 50 kHz to 400 kHz, whereas the
oscillator frequencies are in the range of 43,6 MHz. The wavelength is 80 
m.
© EDP Sciences 2005