材料科学
灵敏度(控制系统)
可穿戴计算机
纳米技术
可穿戴技术
微电子机械系统
拉伤
人体运动
计算机科学
运动(物理)
电子工程
人工智能
嵌入式系统
工程类
医学
内科学
作者
Jun‐Hong Pu,Xing Zhao,Xiang‐Jun Zha,Wu‐Di Li,Kai Ke,Rui‐Ying Bao,Zheng‐Ying Liu,Ming‐Bo Yang,Wei Yang
出处
期刊:Nano Energy
[Elsevier]
日期:2020-05-13
卷期号:74: 104814-104814
被引量:92
标识
DOI:10.1016/j.nanoen.2020.104814
摘要
Wearable flexible electronics are experiencing rapid development for smart life assistance, rehabilitation, and even human enhancement. Owing to the complexity and diversity of wearable and implantable applications, strain sensors with customizable sensing ranges and sensitivities have aroused great interest, while it is still challenging to simultaneously achieve high sensitivity and stretchability. In this work, we report a novel crack design strategy to fabricate sensors for targeted detections via formation of nanocrystal titanium oxide (TiO2) by means of Ti3C2Tx MXene surface oxidation and typical micro- and through-crack pattern sensors for stable large and accurate subtle motion detections are fabricated, respectively. An efficient crack pattern control strategy based on strain localization induced fracture mechanism is proposed. Two typical sensors with a stable sensitivity in a wide sensing range (GF = 1.3 for 0–100% strain) and high sensitivities in small sensing ranges (GF = 530, 3380, 4650, and 75000 in the strain ranges of 0–0.175%, 0.175%–0.45%, 0.45%–3.6%, and 3.6%–5%, respectively) are obtained for large and subtle human motion detection, respectively. This work introduces a new way to fabricate and combinedly use customizable strain sensors for full-range human motion monitoring, addressing the sensitivity-stretchability contradiction issues for conventionally fabricated and solely used strain sensors via strain localization dominated crack control strategy.
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