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Updated: Jun 28, 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

High sensitivity graphene based health sensor with self-warning function.

Lu-Qi Tao¹, Chenwei Gao², Guanya Wang²

¹Beijing Engineering Research Center of Industrial Spectrum Imaging, School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing, 100083, China.

Composites Science and Technology

|April 15, 2024

Summary

This summary is machine-generated.

This study presents a novel laser-induced graphene (LIG) wearable sensor for real-time respiratory monitoring. The device offers high sensitivity and acoustic capabilities for early warning systems, improving patient health outcomes.

Keywords:

Flexible electronics Health monitoring Laser-induced graphene Tensile strain sensor Wearable devices

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Area of Science:

Materials Science
Biomedical Engineering
Sensor Technology

Background:

Respiratory diseases like COVID-19, asthma, and pneumonia necessitate real-time patient monitoring.
Existing wearable sensors often suffer from complex structures and suboptimal performance.
Advanced sensing devices are crucial for early detection and health management.

Purpose of the Study:

To develop a sensitive and robust wearable sensor for real-time respiratory monitoring.
To integrate mechanical sensing and acoustic alarming functions into a single device.
To improve the performance and reduce the complexity of current health detection systems.

Main Methods:

Fabrication of a laser-induced graphene (LIG) device by laser irradiation of Nomex.
Transferring and attaching the LIG onto a Polydimethylsiloxane (PDMS) substrate.
Testing the device's sensitivity, tensile performance, acoustic properties, and thermal stability.

Main Results:

The LIG-PDMS device demonstrated high sensitivity with a gauge factor (GF) of 721.67.
The sensor exhibited stable tensile performance and excellent thermal stability.
The device successfully emitted an alarm sound (SPL close to 60 dB) for signals in the 5-20 kHz range.

Conclusions:

The developed LIG-PDMS device integrates mechanical sensing and acoustic alarming functions effectively.
This novel sensor shows significant potential for applications requiring combined sensing and early warning capabilities.
The device offers a promising solution for enhanced respiratory health monitoring and patient safety.