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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...

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Related Experiment Video

Updated: Jun 22, 2026

Fabrication of a Solution-gated Indium-Tin-Oxide-based One-piece Transistor Enabling Sensitive Biosensing
10:45

Fabrication of a Solution-gated Indium-Tin-Oxide-based One-piece Transistor Enabling Sensitive Biosensing

Published on: August 29, 2025

FET Ion-Sensitive Sensors.

R C Eberhart

    IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society
    |June 5, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Field-effect transistor (FET) based ion sensors show promise for clinical diagnostics. Despite development challenges like reliability and biological compatibility, ongoing solutions demonstrate their potential for medical monitoring.

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    Area of Science:

    • Biomedical Engineering
    • Clinical Chemistry
    • Sensor Technology

    Background:

    • Field-effect transistor (FET) based ion sensors are miniaturized probes with potential applications in clinical medicine.
    • Over 15 years of development have addressed challenges in reliability, biological compatibility, and reference electrode integration.

    Purpose of the Study:

    • To outline the principles of FET based ion sensors.
    • To review the development history and challenges.
    • To present solutions and in vivo/clinical results demonstrating their promise.

    Main Methods:

    • Review of FET based ion sensor principles.
    • Analysis of historical development challenges.
    • Summary of proposed solutions and experimental/clinical data.

    Main Results:

    • FET based ion sensors have faced hurdles in reliability and biocompatibility.
    • Solutions for integration and improved performance have been developed.
    • In vivo and clinical measurements confirm the potential of these sensors.

    Conclusions:

    • FET based ion sensors are promising for clinical monitoring and diagnostics.
    • Overcoming development challenges is key to their widespread adoption.
    • Experimental and clinical data support their future utility in medicine.