Liquid Metal-Based Transient Circuits for Flexible and Recyclable Electronics
Liquid Metal-Based Transient Circuits for Flexible and Recyclable Electronics
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用于柔性和可回收电子产品的液态金属瞬态电路
DOI：
10.1002/adfm.201808739
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发表时间：
2019-03-14
影响因子：
19
通讯作者：
Zhou, Xuechang
中科院分区：
文献类型：
--
作者：
Teng, Long;Ye, Shichao;Zhou, Xuechang
由于材料和策略的选择有限，瞬变电子学根据需要产生了具有可溶解或可降解特征的电子器件，但仍处于早期发展阶段。本文报道了一种以室温液态金属(RTLMS)为电子线路，以水溶性聚乙烯醇(PVA)为封装材料的简易制作暂态电路的方法。由于PVA衬底的良好溶解性和RTLM图形的固有灵活性，制作的暂态电路具有显著的耐用性和弯曲和扭转时稳定的电性能，同时具有较短的暂态时间。此外，基于RTLM的暂态电路具有极高的回收效率，可回收高达96%的RTLM。因此，暂态电子产品的经济和环境可行性大大提高。为了验证这一概念，展示了复杂形状的RTLMS的表面图案化，并随后将暂态天线应用于无源近场通信标签和暂态电容式触摸传感器。文中还展示了基于RTLM的暂态电路在顺序关断发光二极管灯阵列中的应用。目前的基于RTLM的PVA封装电路极大地扩展了瞬变电子学的范围，使之向灵活和可回收的瞬变系统发展。
Transient electronics, arising electronic devices with dissolvable or degradable features on demand, is still at an early stage of development due to the limited choices of materials and strategies. Herein, a facile fabrication method for transient circuits by the combination of room-temperature liquid metals (RTLMs) as the electronic circuit and water-soluble poly(vinyl alcohol) (PVA) as the packaging material is reported. The as-made transient circuits exhibit remarkable durability and stable electric performance upon bending and twisting, while possessing short transience times, owing to the excellent solubility of PVA substrates and the intrinsic flexibility of RTLM patterns. Moreover, the RTLM-based transient circuit shows an extremely high recycling efficiency, up to 96% of the employed RTLM can be recovered. As such, the economic and environmental viability of transient electronics increases substantially. To validate this concept, the surface patterning of RTLMs with complicated shapes is demonstrated, and a transient antenna is subsequently applied for passive near-field communication tag and a transient capacitive touch sensor. The application of the RTLM-based transient circuit for sequentially turning off an array of light-emitting-diode lamps is also demonstrated. The present RTLM-based PVA-encapsulated circuits substantially expand the scope of transient electronics toward flexible and recyclable transient systems.