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Sensor for Biometrics and Virus
Virus Sensor
Oxide semiconductors show excellent swing characteristics with rapidly switching between on/off. An oxide semiconductor-based FET operating in this advanced subthreshold regime is suitable for sensitive sensor with super-low leakage current, high stability, high mobility, and superior scalability.
we developed a multiplexed sensor device based on oxide semiconductor thin-film transistors (TFTs), a specific type of FET fabricated as thin-film layers, designed as an optimized dual-gate structure.
The signal from sensing membrane was amplified and transmitted as much as capacitive coupling, the ratio of voltages transferred between two electrodes through coupled capacitances (Ahn et al., 2020).
Herein, we present a multiplexed sensor device based on dual-gate oxide semiconductor TFTs designed as an optimized dual-gate structure to amplify biosensing via the capacitive coupling. Herein, we present a multiple immune-diagnostic sensor that could rapidly detect and discriminate influenza A virus, SARS-CoV-2, and RSV.
[1] Sehun Jeong et al. "Rapid and simultaneous multiple detection of a tripledemic using a dual-gate oxide semiconductor thin-film transistor-based immunosensor", Biosensors and Bioelectronics, 2023
Biometric Recognition Sensor
Fingerprint Sensor & Vein Sensor
Biometrics is a system that uses personal characteristics to identify a user. Among them, the vein sensor extracts the distribution of veins located under the skin with an image sensor to check the identity inside the human body. Due to its low dependence on the external environment, security is higher than iris recognition and other biometric technologies such as fingerprint, voice and facial recognition.The research team is developing a flexible transparent vein sensor array for mobile security services. We will research photodiodes, transparent electrode arrays, and flexible device arrays for this purpose.
[1] G.-J. Jeon et al. "Highly Sensitive Active-Matrix Driven Self-Capacitive Fingerprint Sensor based on Oxide Thin-Film Transistor", Scientific Reports, 2019
Pressure Sensor
With the advent of an aging society, wearable smart devices that are accessible at any time are receiving more and more attention. Pressure sensors are the most important components in human-computer interaction systems. In our research group, we are developing wearable pressure sensors for electronic skin and pressure sensor arrays that can be used as human-machine interfaces. We are also highly focused on flexible fiber based devices, as well as high-reliability, high-performance devices.
[1] G.-J. Jeon et al. "A highly sensitive, stable, scalable pressure sensor based on a facile baking-inspired foaming process for a human-computer interfaces", Journal of Materials Chemistry C, 2020
[2] T. Jin et al. "Ultrathin Nanofibrous Membranes Containin Insulating Microbeads for Highly Sensitive Flexible Pressure Sensors", ACS Applied Materials & Interfaces, 2020
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