Sensitive Devices Based on Field-Effect Transistors

Abstract

Among the various types of transducers applied in Bioelectronics (i.e., the combination of biological materials and electronic components), Bergveld introduced the concept of field-effect transistor (FET) for neurophysiological measurements presenting to the scientific community the ion-sensitive field-effect transistor (ISFET) [1, 2]. An ISFET is a device very similar to a MOSFET (metal-oxide-semiconductor field-effect transistor). The difference between them is the non-existence of the metallic gate electrode in the ISFET, replaced by a reference electrode in a solution [3].