Journal
SMALL
Volume 14, Issue 35, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201801657
Keywords
electronic skins; flexible pressure sensors; microstructures; natural materials; rose petals
Categories
Funding
- funds of the Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06G587]
- National Natural Science Foundation of China [51771089, U1613204]
- Science Technology and Innovation Committee of Shenzhen Municipality [JCYJ20170817111714314, JCYJ20160613160524999]
- Peacock Plan [Y01256120]
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Nature has long offered human beings with useful materials. Herein, plant materials including flowers and leaves have been directly used as the dielectric material in flexible capacitive electronic skin (e-skin), which simply consists of a dried flower petal or leaf sandwiched by two flexible electrodes. The plant material is a 3D cell wall network which plays like a compressible metamaterial that elastically collapses upon pressing plus some specific surface structures, and thus the device can sensitively respond to pressure. The device works over a broad-pressure range from 0.6 Pa to 115 kPa with a maximum sensitivity of 1.54 kPa(-1), and shows high stability over 5000 cyclic pressings or bends. The natural-material-based e-skin has been applied in touch sensing, motion monitoring, gas flow detection, and the spatial distribution of pressure. As the foam-like structure is ubiquitous in plants, a general strategy for a green, cost-effective, and scalable approach to make flexible e-skins is offered here.
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