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Flexible silicon nanowires sensor for acetone detection on plastic substrates.
Kuibo Lan1,2, Zhi Wang1, Xiaodong Yang1
1School of Microelectronics, Tianjin University, Tianjin 300072, People's Republic of China.
Nanotechnology
|December 28, 2021
Summary
This study presents a flexible silicon nanowire sensor for sensitive and convenient acetone detection. The wearable sensor shows promise for environmental safety, food quality, and healthcare applications.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Acetone is prevalent and poses health risks, necessitating effective monitoring.
- Flexible sensors offer advantages like light weight and conformability for practical applications.
Purpose of the Study:
- To fabricate a high-performance flexible silicon nanowire (SiNW) sensor for sensitive acetone detection.
- To evaluate the sensor's performance in both flat and bending states at room temperature.
Main Methods:
- Fabrication of SiNWs on polyethylene terephthalate (PET) using monocrystalline Si film transfer and metal-assisted chemical etching.
- Testing the sensor's response to gaseous acetone at various concentrations.
Main Results:
- Achieved sensitive detection of gaseous acetone down to 0.1 parts per million (ppm).
- Demonstrated good sensitivity, selectivity, and repeatability at room temperature, even under mechanical bending.
- Observed performance enhancement under bending, with the underlying mechanism investigated.
Conclusions:
- The flexible SiNW sensor is CMOS-compatible and suitable for real-time acetone monitoring.
- The sensor exhibits significant potential for integration into wearable devices for environmental, food, and healthcare monitoring.
