Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 30, Issue 16, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201907091
Keywords
biotemplating strategies; highly sensitive sensors; light-boosting sensors; piezoresistive pressure sensors; surface wrinkling patterns
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Funding
- National Natural Science Foundation of China (NSFC) [21574099, 21875160]
- NSFC [11572179, 11972206]
- Shanghai Rising-Star Program [19QA1400500]
- Shanghai Chenguang Program [16CG01]
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Pressure sensors have attracted tremendous attention because of their potential applications in the fields of health monitoring, human-machine interfaces, artificial intelligence, and so on. Improving pressure-sensing performances, especially the sensitivity and the detection limit, is of great importance to expand the related applications, however it is still an enormous challenge so far. Herein, highly sensitive piezoresistive pressure sensors are reported with novel light-boosting sensing performances. Rose petal-templated positive multiscale millimeter/micro/nanostructures combined with surface wrinkling nanopatterns endow the assembled pressure sensors with outstanding pressure sensing performance, e.g. an ultrahigh sensitivity (70 KPa-1, <0.5 KPa), an ultralow detection limit (0.88 Pa), a wide pressure detect ion range (from 0.88 Pa to 32 KPa), and a fast response time (30 ms). Remarkably, simple light illumination further enhances the sensitivity to 120 KPa-1 (<0.5 KPa) and lowers the detection limit to 0.41 Pa. Furthermore, the flexible light illumination offers unprecedented capabilities to spatiotemporally control any target in multiplexed pressure sensors for optically enhanced/tailorable sensing performances. This light-control strategy coupled with the introduction of bioinspired multiscale structures is expected to help design next generation advanced wearable electronic devices for unprecedented smart applications.
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