Skip to main content
padlock icon - secure page this page is secure

Planar Zeolite-Based Potentiometric Gas Sensors

Buy Article:

Your trusted access to this article has expired.

$106.23 + tax (Refund Policy)

Zeolites are promising materials for gas sensing applications. The properties of high inner surface and catalytic activity are supplemented by internal cation mobility. Therefore, these functional materials provide measurable electrical (ion conductive) characteristics. In the present work, zeolites are applied as ion conductors in a planar potentiometric sensor setup. Two separated electrodes are micro-patterned on alumina substrates. One of them comprises a metal-oxide surface, which was applied by depositing a metal thin-film and subsequent oxidation. Both electrodes are connected by a Pt-doped zeolite thick-film cover on top which acts as the ion conductor. The sensing effect occurs at the interface between zeolite and the different electrode surfaces and is measured as an electromotive force (emf). This signal depends strongly on the gas atmosphere. In addition, the zeolite acts as a catalytic filter affecting the sensor's selectivity. This setup offers a wide range of possible sensor configurations. Electrodes with varying surface materials could be covered by different zeolites that may vary in their Pt- or ion content or in the kind of mobile ions. All manufactured sensors were characterized initially with respect to their signal changes towards hydrogen and propane. The sensor configurations that showed promising results were taken into further investigation. A hydrocarbon-sensitive sensor and a highly sensitive and selective hydrogen sensor could be achieved. The planar setup of the investigated devices leads to a fast response kinetics.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: BUTANE SENSOR; ELECTROCHEMICAL SENSOR; HYDROGEN SENSOR; ZSM-5 ZEOLITE

Document Type: Research Article

Publication date: February 1, 2011

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more