InGaZnO transistor based on porous Ag nanowire-functionalized gate electrode for detection of bio-relevant molecules
- InGaZnO transistor based on porous Ag nanowire-functionalized gate electrode for detection of bio-relevant molecules
- 오영제; 최원국; 강종윤; 황도경; 왕병용; 유태희; 문희규; 상병인; Basavaraj Angadi
- InGaZnO semiconductor; Ag nanowire; Chemical/biological sensing platform
- Issue Date
- Sensors and actuators. B, Chemical
- VOL 254-43
- tWe report on InGaZnO (IGZO) thin film transistors (TFTs)-based bio-chemical sensors which can detectthe chemical/biological species. As novel sensing platform, the IGZO TFT with Ag nanowire (NW) meshshowed pronounced output voltage changes responding to all analytes of H2O2, b-d-glucose, d-glucono-1,5-Lactione, and lactic acid, which are reproducible and reversible. Herein, porous Ag NW-functionalizedtop gate electrode plays a major role in sensing platform for enhanced sensing capability in aqueousmedium. Moreover, these top gate geometry serve as a stable backplane for electrical modulation. Asa result, analytes solutions become acidic or basic and such pH alterations induce significant turn-onvoltage shifts on our devices. For implementation of a resistive load inverter, the output sensing voltagesignals can be directly extracted, and such signals are reproducible and reversible. The proposed IGZOTFTs with Ag NW mesh top gate electrode based sensing platform pave the way for development ofportable and reusable real-time non-destructive label-free chemical/biological sensors.
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