期刊
NANOSCALE
卷 8, 期 24, 页码 12105-12112出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr02678h
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资金
- National Natural Science Foundation of China [51273152, 51473129, 51503160, 51503157]
- National Science and Technology support program [2015BAE01B00]
- Program for New Century Excellent Talents in University [NCET-12-0711]
- Hubei provincial department of education [T201408]
- funds for creative research group of the science and technology department of Hubei province [2015CFA028]
Pressure sensors with 3D conformability are highly desirable components for artificial electronic skin or e-textiles that can mimic natural skin, especially for application in real-time monitoring of human physiological signals. Here, a nanofiber based electronic skin with ultra-high pressure sensitivity and 3D conformability is designed and built by interlocking two elastic patterned nanofibrous membranes. The patterned membrane is facilely prepared by casting conductive nanofiber ink into a silicon mould to form an array of semi-spheroid-like protuberances. The protuberances composed of intertwined elastic POE nanofibers and PPy@ PVA-coPE nanofibers afford a tunable effective elastic modulus that is capable of capturing varied strains and stresses, thereby contributing to a high sensitivity for pressure sensing. This electronic skin-like sensor demonstrates an ultra-high sensitivity (1.24 kPa(-1)) below 150 Pa with a detection limit as low as about 1.3 Pa. The pixelated sensor array and a RGB-LED light are then assembled into a circuit and show a feasibility for visual detection of spatial pressure. Furthermore, a nanofiber based proof-of-concept wireless pressure sensor with a bluetooth module as a signal transmitter is proposed and has demonstrated great promise for wireless monitoring of human physiological signals, indicating a potential for large scale wearable electronic devices or e-skin.
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