Chemical field-effect transistor

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ChemFET, or chemical field-effect transistor,[1] is a type of a field-effect transistor acting as a chemical sensor. It is a structural analog of a MOSFET transistor, where the charge on the gate electrode is applied by a chemical process. It may be used to detect atoms, molecules, and ions in liquids and gases.

ISFET, an ion-sensitive field-effect transistor, is the best known subtype of ChemFET devices. It is used to detect ions in electrolytes.

ENFET is a CHEMFET specialized for detection of specific biomolecules using enzymes.


  1. ^ Florinel-Gabriel Banica, Chemical Sensors and Biosensors: Fundamentals and Applications, John Wiley and Sons, Chichester, 2012, chapter 11, Print ISBN 978-0-470-71066-1; Web ISBN 0-470710-66-7; e-ISBN 978-1-118-35423-0.

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