Nacre-inspired MXene-based film for highly sensitive piezoresistive sensing over a broad sensing range  

作　　者：Gaofeng Wang Lingxian Meng Xinyi Ji Xuying Liu Jiajie Liang Shuiren Liu 

机构地区：[1]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China [2]School of Materials Science and Engineering,National Institute for Advanced Materials,Nankai University,Tianjin 300350,China

出　　处：《Bio-Design and Manufacturing》2024年第4期463-475,共13页生物设计与制造（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.52003253 and 52203245);the China Postdoctoral Innovative Talent Support Program(No.BX20220274);the Henan Science and Technology Department,China(No.222301420004)。

摘　　要：As the main component of wearable electronic equipment,flexible pressure sensors have attracted wide attention due to their excellent sensitivity and their promise with respect to applications in health monitoring,electronic skin,and human-computer interactions.However,it remains a significant challenge to achieve epidermal sensing over a wide sensing range,with short response/recovery time and featuring seamless conformability to the skin simultaneously.This is critical since the capture of minute electrophysiological signals is important for health care applications.In this paper,we report the preparation of a nacre-like MXene/sodium carboxymethyl cellulose(CMC)nanocomposite film with a“brick-and-mortar”interior structure using a vacuum-induced self-assembly strategy.The synergistic behavior of the MXene“brick”and flexible CMC“mortar”contributes to attenuating interlamellar self-stacking and creates numerous variable conductive pathways on the sensing film.This resulted in a high sensitivity over a broad pressure range(i.e.,0.03-22.37 kPa:162.13 kPa^(-1);22.37-135.71 kPa:127.88 kPa^(-1);135.71-286.49 kPa:100.58 kPa^(-1)).This sensor also has a low detection limit(0.85 Pa),short response/recovery time(8.58 ms/34.34 ms),and good stability(2000 cycles).Furthermore,we deployed pressure sensors to distinguish among tiny particles,various physiological signals of the human body,space arrays,robot motion monitoring,and other related applications to demonstrate their feasibility for a variety of health and motion monitoring use cases.

关 键 词：Flexible pressure sensor MXene BIOINSPIRED Physiological signals Interlayer spacing 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]