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A flexible, transparent and high-performance gas sensor based on layer-materials for wearable technology.
Zhaoqiang Zheng1, Jiandong Yao1, Bing Wang2
1State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou, 510275, Guangdong, People's Republic of China.
Nanotechnology
|August 1, 2017
Summary
Highly-crystalline indium selenide (In2Se3) films enable high-performance, room-temperature acetylene gas detection. Activated by light, these flexible sensors offer a promising alternative to traditional high-temperature gas sensors.
Area of Science:
- Materials Science
- Chemical Sensors
- Nanotechnology
Background:
- Gas sensors are crucial for various applications, with layered materials showing recent advancements.
- High operating temperatures of current gas sensors limit their practical use.
- Developing room-temperature gas sensors is essential for broader applications.
Purpose of the Study:
- To develop a flexible, transparent, and high-performance gas sensor for acetylene (C2H2) detection at room temperature.
- To investigate the potential of highly-crystalline indium selenide (In2Se3) films for gas sensing applications.
- To explore light-activated gas sensing mechanisms for energy-efficient operation.
Main Methods:
- Fabrication of highly-crystalline In2Se3 films using pulsed laser deposition (PLD).
- Construction of flexible and transparent gas sensor devices.
- Testing sensor performance for acetylene (C2H2) gas detection under UV-vis-NIR and solar light activation at room temperature.
- Evaluating sensor stability under bending conditions.
Main Results:
- The In2Se3 gas sensors demonstrated high performance in detecting acetylene (C2H2) at room temperature.
- Light activation (UV-vis-NIR, solar) significantly enhanced sensor properties.
- A photo-induced charge transfer mechanism was identified as key to sensing C2H2.
- The flexible sensors maintained performance after 100 bending cycles.
- Devices fabricated on rigid substrates also showed room-temperature gas detection capabilities.
Conclusions:
- Indium selenide (In2Se3) is a promising material for room-temperature acetylene gas monitoring.
- Light-activated sensing offers a pathway for energy-efficient gas sensors.
- The developed flexible and transparent sensors have potential for next-generation gas sensing technologies.
