Self-healable, recyclable, ultrastretchable, and high-performanceNO_(2) sensors based on an organohydrogel for room and sub-zero temperature and wireless operation
作者机构：State Key Laboratory of Optoelectronic Materials and Technologies and the Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-sen UniversityGuangzhouChina Ministry of Education Key Laboratory of Micro and Nano Systems for AerospaceNorthwestern Polytechnical UniversityXi'anChina School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouChina
出 版 物：《SmartMat》 (智能材料（英文）)
年 卷 期：2023年第4卷第1期
页 面：168-184页
学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程]
基 金：Fundamental Research Funds for the Central Universities,Sun Yat-sen University,Grant/Award Number:22lgqb17 National Natural Science Foundation of China,Grant/Award Number:61801525 Guangdong Basic and Applied Basic Research Foundation,Grant/Award Number:2020A1515010693
主 题：hydrogel NO_(2)gas sensor self-healing and recyclable organohydrogel stretchable and wearable electronics wireless gas sensor
摘 要：To date,development of high-performance,stretchable gas sensors operating at and below room temperature(RT)remains a challenge in terms of traditional sensing ***,we report on a high-performance NO_(2) gas sensor based on a self-healable,recyclable,ultrastretchable,and stable polyvinyl alcohol–cellulose nanofibril double-network organohydrogel,which features ultrahigh sensitivity(372%/ppm),low limit of detection(2.23 ppb),relatively fast response and recovery time(41/144 s for 250 ppb NO_(2)),good selectivity against interfering gases(NH3,CO_(2),ethanol,and acetone),excellent reversibility,repeatability,and long-term stability at RT or even at−20°*** particular,this sensor shows outstanding stability against large deformations and mechanical damages so that it works normally after rapid self-healing or remolding after undergoing mechanical damage without significant performance degradation,which has major advantages compared to state-of-the-art gas *** high NO_(2) sensitivity and selectivity are attributed to the selective redox reactions at the threephase interface of gas,gel,and electrode,which is even boosted by applying tensile *** a specific electrical circuit design,a wireless NO_(2) alarm system based on this sensor is created to enable continuous,real-time,and wireless NO_(2) detection to avoid the risk of exposure to NO_(2) higher than threshold concentrations.
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