Ultrathin gas permeable oxide membranes for chemical sensing: Nanoporous Ta2O5 test study
- McMaster Univ., Hamilton, ON (Canada)
- Univ. of Brescia and CNR-INO, Brescia (Italy)
- Southern Illinois Univ. at Carbondale, Carbondale, IL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Conductometric gas sensors made of gas permeable metal oxide ultrathin membranes can combine the functions of a selective filter, preconcentrator, and sensing element and thus can be particularly promising for the active sampling of diluted analytes. Here we report a case study of the electron transport and gas sensing properties of such a membrane made of nanoporous Ta2O5. These membranes demonstrated a noticeable chemical sensitivity toward ammonia, ethanol, and acetone at high temperatures above 400 °C. Furthermore, different from traditional thin films, such gas permeable, ultrathin gas sensing elements can be made suspended enabling advanced architectures of ultrasensitive analytical systems operating at high temperatures and in harsh environments.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1263868
- Journal Information:
- Materials, Vol. 8, Issue 10; ISSN 1996-1944
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
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