Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 142, Issue 1, Pages 204-209Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.07.042
Keywords
Polypyrrole (PPy); Nanowire arrays; Anodic aluminum oxide (AAO); Ammonia
Funding
- Knowledge Innovation Program of the Chinese Academy of Sciences
- National High Technology Research and Development Program of China [2007AA022005]
- National Basic Research Program of China [2007CB936603]
- National Natural Science Foundation of China [60604022, 10635070, 60801021]
- Anhui Provincial Natural Science Foundation [090412036]
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A novel sensor based on the PPy nanowire arrays with high density, small diameter (about 50 nm) presented a significantly high surface-to-volume ratio. Conducting polypyrrole (PPy) nanowire arrays were synthesized by electropolymerization in the anodic aluminum oxide (AAO) template which was fabricated by two-step anodizing process. Then, two sides of the PPys/AAO were pasted by Si substrates and the AAO template was etched by HF acid. At last, the gold wires were attached on Si substrates, and the sensor came into being. The sensor was sensitive to ammonia at room temperature and showed relatively high response in low concentration and comparatively short response and recovery time. (C) 2009 Elsevier B. V. All rights reserved.
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