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Proceedings Paper

A hydrogen gas sensor fabricated from polythiophene nanofibers deposited on a 36°YX LiTaO3 layered surface acoustic wave transducer
Author(s): Laith Al-Mashat; Henry D. Tran; Richard B. Kaner; Rashidah Arsat; Kourosh Kalantar-Zadeh; Wojtek Wlodarski
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Paper Abstract

A gas sensor was developed by depositing polythiophene nanofibers on the surface of ZnO/36° YX LiTaO3 layered surface acoustic wave (SAW) transducer and tested towards different concentrations of hydrogen gas in synthetic air. Polythiophene nanofibers were synthesized by using a template-free method through the introduction of an initiator into the reaction mixture of a rapidly mixed reaction between the monomer (thiophene) and the oxidant. The yield of the reaction was characterized using scanning electron microscopy (SEM) as well as Ultraviolet-visible (UV-vis) and Fourier Transform Infrared (FTIR) spectroscopies. The frequency shift due to the sensor response was ~17 kHz towards 1% of H2. All tests were conducted at room temperature. The sensor performance was assessed over a two day period and a high degree of repeatability was obtained.

Paper Details

Date Published: 30 December 2008
PDF: 8 pages
Proc. SPIE 7268, Smart Structures, Devices, and Systems IV, 72680M (30 December 2008); doi: 10.1117/12.810616
Show Author Affiliations
Laith Al-Mashat, RMIT Univ. (Australia)
Henry D. Tran, Univ. of California, Los Angeles (United States)
Richard B. Kaner, Univ. of California, Los Angeles (United States)
Rashidah Arsat, RMIT Univ. (Australia)
Kourosh Kalantar-Zadeh, RMIT Univ. (Australia)
Wojtek Wlodarski, RMIT Univ. (Australia)

Published in SPIE Proceedings Vol. 7268:
Smart Structures, Devices, and Systems IV
Said Fares Al-Sarawi; Vijay K. Varadan; Neil Weste; Kourosh Kalantar-Zadeh, Editor(s)

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