Enzyme field effect transistor

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An enzyme field-effect transistor ( English enzyme field-effect transistor , ENFET ), and enzymatically active field effect transistor , called is a special chemically-sensitive field effect transistor (ChemFET). It works in a similar way to an ion-sensitive field effect transistor (ISFET), but has a gel or polymer layer with an immobilized enzyme as a gate for the selective detection of mostly biological substances (e.g. fatty acids , glucose , urea , penicillin , pesticides, etc.) in liquids . The enzyme acts as a selective catalyst, whereby in a chemical reaction with the analyte z. B. a pH change takes place, which is a measure of the concentration of the analyte. The ENFET is one of the biosensors .

See also

• Enzyme-linked Immunosorbent Assay
• Insulating gate field effect transistor

literature

• Matthias Otto: Analytical Chemistry. Wiley-VCH, 2000, ISBN 3-527-29840-1 .
• Friedrich Oehme et al .: Chemical sensors today and tomorrow . Cape. 6.2 Enzyme FET . expert verlag, 1994, ISBN 978-3-8169-0959-0 .

Web links

• ENFET. In: Henskes Online Lexicon. Retrieved September 4, 2014 .