A hydrogen sensor based on tunneling between palladium clusters

J. Van Lith; A. Lassesson; S. A. Brown; M. Schulze; J. G. Partridge; A. Ayesh

doi:10.1063/1.2802730

A hydrogen sensor based on tunneling between palladium clusters

J. Van Lith, A. Lassesson, S. A. Brown, M. Schulze, J. G. Partridge, A. Ayesh

Department of Physics

Research output: Contribution to journal › Article › peer-review

98 Citations (Scopus)

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.

Original language	English
Article number	181910
Journal	Applied Physics Letters
Volume	91
Issue number	18
DOIs	https://doi.org/10.1063/1.2802730
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2802730

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AU - Van Lith, J.

AU - Lassesson, A.

AU - Brown, S. A.

AU - Schulze, M.

AU - Partridge, J. G.

AU - Ayesh, A.

PY - 2007

Y1 - 2007

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AB - 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.

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A hydrogen sensor based on tunneling between palladium clusters

Abstract

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