What is an Ion Selective Field Effect Transistor (ISFET)?
An Ion Selective Field Effect Transistor (ISFET) is a type of transistor used to measure ion concentrations in a solution. It operates similarly to a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), but with an ion-sensitive membrane replacing the metal gate. This membrane is sensitive to specific ions, allowing the ISFET to detect and quantify their presence.
