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Proceedings Paper

Tin dioxide thin film hydrogen nanosensor
Author(s): V. M. Aroutiounian; A. Z. Adamyan; Z. N. Adamyan; A H. Arakelyan
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Paper Abstract

We present the results of investigations of double-layer thin-film hydrogen sensors that show high sensitivity at low operating temperatures and improved reliability. These hydrogen sensors are manufactured using the both ion-plasma assisted sputtering and sol-gel technique. It was established that the highest sensitivity of the sensors occurred at 100-130°C. The hydrogen sensitivity depends on hydrogen concentration linearly starting at 50 ppm, and reaches 104 at 5000 ppm. The response time was 1-2 s and the recovery times were less than 10 s. We show that compared to constant power supply, pulse heating of the sensor improves the stability of the sensor, reduces the sensitivity to humidity, and reduces performance drift. Various possibilities of reducing CO gas cross sensitivity are also presented.

Paper Details

Date Published: 16 April 2008
PDF: 12 pages
Proc. SPIE 6943, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense VII, 69430J (16 April 2008); doi: 10.1117/12.777334
Show Author Affiliations
V. M. Aroutiounian, Yerevan State Univ. (Armenia)
A. Z. Adamyan, Yerevan State Univ. (Armenia)
Z. N. Adamyan, Yerevan State Univ. (Armenia)
A H. Arakelyan, Yerevan State Univ. (Armenia)


Published in SPIE Proceedings Vol. 6943:
Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense VII
Edward M. Carapezza, Editor(s)

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