A hydrogen sensor based on tunneling between palladium clusters

Van Lith, J, Lassesson, A, Brown, S, Schulze, M, Partridge, J and Ayesh, A 2007, 'A hydrogen sensor based on tunneling between palladium clusters', Applied Physics Letters, vol. 91, no. 18, pp. 1-3.

Document type: Journal Article
Collection: Journal Articles

Title A hydrogen sensor based on tunneling between palladium clusters
Author(s) Van Lith, J
Lassesson, A
Brown, S
Schulze, M
Partridge, J
Ayesh, A
Year 2007
Journal name Applied Physics Letters
Volume number 91
Issue number 18
Start page 1
End page 3
Total pages 3
Publisher American Institute of Physics
Abstract We describe nanocluster based tunneling sensors for detecting hydrogen. Pd clusters with diameters ranging from 3.5 to 6 nm are deposited between a pair of contacts until a predetermined resistance between the contacts is obtained. We demonstrate that the conduction through the cluster film is dominated by tunneling gaps. Upon exposure to hydrogen, the clusters expand, reducing the average size of the gaps and reducing the measured resistance. The sensor response as a function of external hydrogen pressure is described, for different cluster sizes and different operating temperatures, by a simple model with a single physically meaningful fitting parameter.
Subject Surfaces and Structural Properties of Condensed Matter
DOI - identifier 10.1063/1.2802730
ISSN 0003-6951
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