Share Email Print
cover

Proceedings Paper

Anodized aluminum oxide (AAO) based nanowells for hydrogen detection
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A nanostructured sensing element based on anodic aluminum oxide (AAO) nanowells was fabricate and assessed for hydrogen gas sensing. AAO nanowells with an average diameter of 73 nm and depth proportional to the anodization time were immersed in a surfactant solution and coated with an 8 nm film of palladium nanoparticles. The electrical resistance change of the nanostructure with hydrogen gas exposure was used as the sensing parameter. The AAO nanowells-Pd nanostructures were characterized using atomic force microscopy (AFM), field-emission scanning electron microscopy (FESEM), and contact angle test. Hydrogen concentrations as low as 0.05 vol% (500 ppm) can be detected at room temperature. Response times as fast as 1.15 seconds were obtained. Compared to current devices and nanostructures in development, the AAO nanowell-Pd nanostructure is found to be considerably fast without compromising sensitivity and selectivity.

Paper Details

Date Published: 8 April 2008
PDF: 9 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 693230 (8 April 2008); doi: 10.1117/12.776981
Show Author Affiliations
Francisco Rumiche, Univ. of Illinois at Chicago (United States)
Argonne National Lab. (United States)
Hsien-Hau Wang, Argonne National Lab. (United States)
J. Ernesto Indacochea, Univ. of Illinois at Chicago (United States)
Ming L. Wang, Univ. of Illinois at Chicago (United States)


Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

© SPIE. Terms of Use
Back to Top