材料科学
热致变色
纳米尺度
纳米技术
可视化
可穿戴计算机
可读性
信号(编程语言)
拉伤
过程(计算)
计算机科学
人工智能
嵌入式系统
有机化学
化学
程序设计语言
内科学
操作系统
医学
作者
Byeonghak Park,Jong Uk Kim,Jisun Kim,Dongha Tahk,Chanho Jeong,Jehyung Ok,Joo Hwan Shin,Daeshik Kang,Tae‐il Kim
标识
DOI:10.1002/adfm.201903360
摘要
Abstract As eidetic signal recognition has become important, displaying mechanical signals visually has imposed huge demands for simple readability and without complex signal processing. Such visualization of mechanical signals is used in delicate urgent medical or safety‐related industries. Accordingly, chromic materials are considered to facilitate visualization with multiple colors and simple process. However, the response and recovery time is very long, such that rapid regular signals are unable to be detected, i.e., physiological signals, such as respiration. Here, the simple visualization of low strain ≈2%, with ultrasensitive crack‐based strain sensors with a hierarchical thermochromic layer is suggested. The sensor shows a gradient color change from red to white color in each strain, which is attributed to the hierarchical property, and the thermal response (recovery) time is dramatically minimized within 0.6 s from 45 to 37 °C, as the hierarchical membrane is inspired by termite mounds for efficient thermal management. The fast recovery property can be taken advantage of in medical fields, such as monitoring regular respiration, and the color changes can be delicately monitored with high accuracy by software on a mobile phone.
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