Liquid metal microchannels as digital sensors in mechanical metamaterials
Liquid metal microchannels as digital sensors in mechanical metamaterials
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DOI：
10.1016/j.eml.2020.100871
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发表时间：
2020-10-01
影响因子：
4.7
通讯作者：
Harne, Ryan L.
中科院分区：
文献类型：
--
作者：
Nick, Zachary H.;Tabor, Christopher E.;Harne, Ryan L.
本报告探讨了液态金属基柔性电子和机械超材料的原理合成。在这种新平台中，机械变形与液态金属微通道耦合，通过嵌入软材料中的液态金属的收缩和释放来控制导电。通过对机械设计、液态金属氧化和应力阈值的研究，确定了影响诱导这种离散开关电现象的能力的机制。通过对这些因素的策略性选择，可重复的切换能力在超材料上的许多应力循环中得以保留，尽管通过在潜在故障之前随着循环而降低的切换阈值，该现象的老化是明显的。这些发现为自感知机械超材料提供了新的基础，这些超材料利用液态金属聚结和局部机械变形的界面，在连续受力的超材料中产生数字信号能力。(C)2020爱思唯尔有限公司保留所有权利。
This report explores a synthesis of principles from liquid metal-based flexible electronics and mechanical metamaterials. In such new platforms, mechanical deformation couples with liquid metal microchannels to govern electrical conduction by constriction and release of liquid metal embedded in the soft material. The mechanisms that influence the ability to induce such discrete switch electrical phenomena are identified through studies focused on mechanical design, liquid metal oxidation, and stress thresholds. Through strategic selection of such factors, repeatable switch ability is retained for many stress cycles on the metamaterial, although aging of the phenomena is evident through switch thresholds that reduce with cycles prior to potential failure. These discoveries provide new foundations for self-sensing mechanical metamaterials that leverage an interface of liquid metal coalescence and local mechanical deformation to lead to digital signaling abilities in continuously stressed metamaterials. (C) 2020 Elsevier Ltd. All rights reserved.