From hydrogen sensors to olfactory images — twenty years with catalytic field-effect devices

• A personal description of the history of gas-sensitive field-effect devices is given. It is shown how the originally described palladium-gate metal-oxide-semiconductor field-effect transistor has developed into sensing surfaces enabling the production of response images to odours. Images obtained for the odour from different cheeses are presented as examples of such artificial olfactory images.

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TECHNOLOGY

TEKNIKVETENSKAP

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