Gap-gate field effect gas sensing device for chemical image generation

Filippini, D.; Lundström, I.; Uchida, H.
April 2004
Applied Physics Letters;4/12/2004, Vol. 84 Issue 15, p2946
Academic Journal
A field effect chemically sensitive device, specially suited for the generation of scanning light pulse technique chemical images, is demonstrated. The present approach provides a complete separation between the required electrical biasing and chemical sensing functions inherently coupled in all previous systems. The concept is demonstrated by sensing hydrogen with insensitive biasing electrodes, composing a so-called gap gate, combined with discontinuous palladium clusters usually unsuitable for sensing in conventional arrangements. A simple one-dimensional model is used to explain the observed behavior. © 2004 American Institute of Physics.


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