期刊
RESEARCH
卷 2022, 期 -, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.34133/research.0002
关键词
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资金
- National Key Research and Development Program of China [2020YFB2008501]
- National Natural Science Foundation of China [11904289]
- Key Research and Development Program of Shaanxi Province [2020ZDLGY04-08, 2020GXLH-Z-027]
- Ningbo Natural Science Foundation [202003N4003]
- Fundamental Research Funds for the CentralUniversities [3102019PY004, 31020190QD010, 3102019JC004]
- Northwestern Polytechnical University [19SH020159, 20GH020140]
Flexible and wearable pressure sensors are crucial for accurate and real-time tracking of physiological signals. This study presents a novel type of sensor that overcomes the saturation and achieves ultra-high sensitivity and wide detection range through the soft-strain effect. The sensor demonstrates excellent stability and capability for monitoring arterial pulse waves.
Flexible and wearable pressure sensors attached to human skin are effective and convenient in accurate and real-time tracking of various physiological signals for disease diagnosis and health assessment. Conventional flexible pressure sensors are constructed using compressible dielectric or conductive layers, which are electrically sensitive to external mechanical stimulation. However, saturated deformation under large compression significantly restrains the detection range and sensitivity of such sensors. Here, we report a novel type of flexible pressure sensor to overcome the compression saturation of the sensing layer by soft-strain effect, enabling an ultra-high sensitivity of similar to 636 kPa(-1) and a wide detection range from 0.1 kPa to 56 kPa. In addition, the cyclic loading-unloading test reveals the excellent stability of the sensor, which maintains its signal detection after 10,000 cycles of 10 kPa compression. The sensor is capable of monitoring arterial pulse waves from both deep tissue and distal parts, such as digital arteries and dorsal pedal arteries, which can be used for blood pressure estimation by pulse transit time at the same artery branch.
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