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High-sensitivity acoustic sensors from nanofibre webs
Chenhong Lang1,2, Jian Fang2, Hao Shao2
1College of Textiles, Donghua University, Shanghai 201620, China.
Nature Communications
|March 24, 2016
Summary
Electrospun piezoelectric nanofibres demonstrate significant acoustic-to-electric conversion for sensing applications. These novel nanofibre webs offer high sensitivity for detecting low-frequency sound waves, outperforming commercial devices.
Area of Science:
- Materials Science
- Nanotechnology
- Acoustics
Background:
- Polymer nanofibres, particularly piezoelectric ones from electrospinning, are known for mechanical-to-electrical energy conversion.
- Limited research exists on the acoustic-to-electric conversion capabilities of electrospun nanofibres.
Purpose of the Study:
- To investigate the acoustic-to-electric conversion ability of electrospun piezoelectric nanofibre webs.
- To evaluate the potential of these nanofibres for developing high-performance acoustic sensors.
Main Methods:
- Fabrication of piezoelectric nanofibre webs using poly(vinylidene fluoride) via electrospinning.
- Development of a sensor device to transfer sound directly to the nanofibre layer.
- Measurement of the sensor's sensitivity and frequency response to sound waves.
Main Results:
- Electrospun piezoelectric nanofibre webs exhibit strong acoustic-to-electric conversion.
- The sensor devices detected low-frequency sound with high sensitivity (266 mV Pa⁻¹).
- The devices accurately distinguished sound waves in the low to middle frequency range, showing over five times higher sensitivity than commercial piezoelectric films.
Conclusions:
- Electrospun piezoelectric nanofibres possess significant potential for acoustic sensing.
- These nanofibre webs are particularly suitable for noise detection applications.
- The developed sensor technology offers a promising route for high-performance acoustic sensors.
