Ultra-sensitive and wide applicable strain sensor enabled by carbon nanofibers with dual alignment for human machine interfaces
作者机构：Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of EducationDepartment of ChemistryTsinghua UniversityBeijing 100084China Laboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第3期
页 面：4093-4099页
核心收录：
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：supported by the National Natural Science Foundation of China(Nos.52125201 and 21975141) the National Key Research and Development Program of China(No.2020YFA0210702)
主 题：nanofiber membrane carbon nanofibers flexible sensor dual-alignment high sensitivity
摘 要：Flexible strain sensors with high sensitivity,wide detection range,and low detection limit have continuously attracted great interest due to their tremendous application potential in areas such as health/medical-care,human-machine interface,as well as safety and *** both of a high sensitivity and a wide working range are desired key parameters for a strain sensor,they are usually contrary to each other to be achieved on the same sensor due to the tightly structure dependence of both of ***,a flexible strain sensor with both high sensitivity and wide strain detection range is prepared based on the design of an integrated membrane containing both of parallel aligned and randomly aligned carbon nanofibers(CNFs).The parallel aligned CNF membrane(p-CNF)exhibits a low strain detection limit and high sensitivity,while the random aligned CNF membrane(r-CNF)exhibits a large strain detection *** the advantages of both p-CNF and r-CNF,the strain sensor with stacked p-CNF and r-CNF(p/r-CNF)exhibits both high sensitivity and wide working *** gauge factor(GF)is 1,272 for strains under 0.5%and 2,266 for strain from 70%to 100%.At the same time,it can work in a wide strain range of 0.005%to 100%,fulfilling the requirements for accurately detecting full-range human *** demonstrated its applications in the recognition of facial expressions and joint ***,we constructed an intelligent lip-language recognition system,which can accurately track phonetic symbols and may help people with language disabilities,proving the potential of this strain sensor in health management and medical ***,we foresee that the dual-alignment structure design of the p/r-CNF strain sensor may also be applied in the design of other high performance sensors.
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