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Wearable and Multiplexed Biosensors based on Oxide Field-Effect Transistors.
Huihui Ren1,2, Siyu Zhang3, Dingwei Li2,4
1School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China.
Small Methods
|July 6, 2024
Summary
Researchers developed a flexible, integrated wearable biosensor using an ultrathin indium oxide channel. This device enables simultaneous, on-site measurement of ions (H+, Na+, K+) and temperature for advanced portable healthcare.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Wearable sensors are crucial for continuous, non-invasive portable healthcare monitoring.
- Oxide field-effect transistor (FET)-type biosensors offer high sensitivity and scalability but lack flexibility and integration.
- Existing wearable sensors struggle with multiplexed sensing and on-site signal processing.
Purpose of the Study:
- To develop a fully integrated wearable oxide FET-based biosensor array.
- To enable multiplexed and simultaneous measurement of ion concentrations and temperature.
- To overcome limitations in flexibility, integration, and on-site processing for wearable biosensors.
Main Methods:
- Utilized a solution-processed ultrathin (≈6 nm) In2O3 active channel layer for the FET-sensor array.
- Fabricated a flexible and uniform FET-sensor array compatible with standard semiconductor technology.
- Achieved low operational voltage (0.005 V) for energy-efficient wearable applications.
Main Results:
- Demonstrated high mechanical flexibility and uniformity of the In2O3 FET-sensor array.
- Successfully achieved multiplexed and simultaneous measurement of H+, Na+, K+ ion concentrations and temperature.
- Validated the potential for integrated on-site signal processing and wireless transmission.
Conclusions:
- Developed an effective method for oxide FET-based biosensors for wearable applications.
- Enabled the fusion of multiplexed physicochemical information for comprehensive health monitoring.
- Paved the way for advanced, integrated wearable health monitoring systems.
Keywords:
biosensorsfield‐effect transistorsmultiplexed sensingoxide semiconductorswearable electronicsMore Related Videos
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