1. Development of ChemFET chemical field-effect transistors
At the initiative of P. Bergveld in the 1970s, the MOSFET transistor was adapted to liquid-phase detection, leading to the concept of the ChemFET (chemical field effect transistor) or ISFET (ion-sensitive field effect transistor) .
To achieve this, the metal gate electrode (G ) is replaced by an ion-sensitive insulator, and the gate is electrically biased through an electrolyte via a reference electrode (figure
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Development of ChemFET chemical field-effect transistors
Development of EnFET enzymatic field-effect transistors
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