文献类型：期刊文献

英文题名：Processing Natural Wood into a High-Performance Flexible Pressure Sensor

作者：Guan, Hao[1] Meng, Junwang[1] Cheng, Zhiyong[1] Wang, Xiaoqing[1,2]

第一作者：Guan, Hao

通信作者：Wang, XQ[1];Wang, XQ[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Dept Wood Modificat, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China

年份：2020

卷号：12

期号：41

起止页码：46357-46365

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;Scopus(收录号：2-s2.0-85092945322);WOS:【SCI-EXPANDED(收录号:WOS:000582345700064)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2020QA004) and the National Key Research and Development Program of China (2017YFD0600202).

语种：英文

外文关键词：flexible wood; green electronics; piezoresistive; pressure sensors; sensitivity

摘要：Flexible pressure sensors have received wide attention because of their potential applications in wearable electronics and electronic skins (e-skins). However, the high performance of the pressure sensors relies principally on the introduction of complex surface microstructures, which often involves either complicated procedures or costly microfabrication methods. Moreover, these devices predominantly use synthetic polymers as flexible substrates, which are generally nonbiodegradable or not ecofriendly. Here, we report a facile and scalable processing strategy to convert naturally rigid wood into reduced graphene oxide (rGO)-modified flexible wood (FW/rGO) via saw cutting, chemical treatment, and rGO coating, resulting in high-performance wood-based flexible piezoresistive pressure sensors. Benefiting from the largely deformable ribbon-like surface microstructures, the obtained wood-based pressure sensor displayed a high sensitivity of 1.85 kPa(-1) over a broad linear range up to 60 kPa and showed high stability over 10 000 cyclic pressings. The favorable sensing performance of the pressure sensor allows for accurate recognition of finger movements, acoustic vibrations, and real-time pulse waves. Moreover, a large-area pressure sensor array has been successfully assembled on one piece of flexible wood for spatial pressure mapping. The proposed strategy of directly using natural wood for high-performance flexible pressure sensors is simple, low-cost, sustainable, and scalable, opening up a new avenue for the development of next-generation wearable electronics and e-skins.