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Field Effect Transistor

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...

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Updated: Jun 5, 2025

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

Published on: February 1, 2022

Multifunctional Integrated Biosensors Based on Two-Dimensional Field-Effect Transistors.

Yang Yue^1,2,3, Chang Chen^1,2,4, Yunqi Liu^4,3,5

¹State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.

ACS Applied Materials & Interfaces

|December 11, 2024

Summary

This summary is machine-generated.

Field-effect transistor (FET) biosensors utilize advanced two-dimensional (2D) materials for sensitive, label-free detection. This review explores 2D FET biosensor trends, designs, and future clinical applications.

Keywords:

biosensors field-effect transistor two-dimensional materials

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Area of Science:

Materials Science
Biotechnology
Sensor Technology

Background:

Field-effect transistor (FET) sensing offers noninvasive, label-free, real-time detection.
Two-dimensional (2D) materials provide high surface area, flexibility, and conductivity, ideal for biosensors.
FET biosensors show promise in biomarker analysis and healthcare.

Purpose of the Study:

To review recent trends in 2D material-based FET biosensors.
To discuss structural designs and modification strategies for enhanced performance.
To provide insights into future advancements and clinical applications.

Main Methods:

Review of recent literature on 2D FET biosensors.
Analysis of key performance metrics and characteristics.
Discussion of material properties (graphene, TMDs, black phosphorus) and device engineering.

Main Results:

2D materials significantly enhance FET biosensor performance.
Various structural designs and modification strategies improve sensitivity and specificity.
Graphene, transition metal dichalcogenides, and black phosphorus are key materials.

Conclusions:

2D FET biosensors represent a significant advancement in diagnostic technology.
Further research is needed to optimize designs for practical clinical use.
Future directions include improved sensitivity, multiplexing, and integration into point-of-care devices.