Journal
NANO RESEARCH
Volume 10, Issue 8, Pages 2683-2691Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1470-1
Keywords
electronic eardrum (EE); pressure sensor; carbon nanotube; voice recognition
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Funding
- National Natural Science Foundation of China [61574163]
- China Postdoctoral Science Foundation [2015M571837]
- Foundation Research Project of Jiangsu Province [BK20150364]
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Flexible mechanosensors with a high sensitivity and fast response speed may advance the wearable and implantable applications of healthcare devices, such as real-time heart rate, pulse, and respiration monitoring. In this paper, we introduce a novel flexible electronic eardrum (EE) based on single-walled carbon nanotubes, polyethylene, and polydimethylsiloxane with micro-structured pyramid arrays. The EE device shows a high sensitivity, high signal-to-noise ratio (approximately 55 dB), and fast response time (76.9 mu s) in detecting and recording sound within a frequency domain of 20-13,000 Hz. The mechanism for sound detection is investigated and the sensitivity is determined using the micro-structure, thickness, and strain state. We also demonstrated that the device is able to distinguish human voices. This unprecedented performance of the flexible electronic eardrum has implications for many applications such as implantable acoustical bioelectronics and personal voice recognition.
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