Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors,Advanced Materials Technologies

当前位置： X-MOL 学术 › Adv. Mater. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-01-12 , DOI: 10.1002/admt.201900823
Peng Li ₁ , Yang Zhao ₁ , Jiangang Ma ₁ , Yang Yang ₁ , Haiyang Xu ₁ , Yichun Liu ₁

Affiliation

Pressure sensors are in urgent need due to the explosive demands in electronic skins. However, current resistive‐type pressure sensors require electrode materials with complex multilevel microstructures or low opacity. Herein, a Cu network transparent electrode (TE) embedded in the polydimethylsiloxane (PDMS) substrate is designed to realize wearable pressure sensor. The Cu network is fabricated by oxygen plasma treatment–assisted crack template and electroplating. The oxygen plasma treatment improves the surface adhesion force of the substrate, which suppresses uneven template cracking and prevents the electroplating solution from seeping under the templates, thereby resulting in 20 times figure‐of‐merit improvement in optoelectronic performance. Sandwiching the Cu network between PDMS layers provides the best flexibility reported for such a low‐cost transparent conducting material. The embedded Cu network TE‐based pressure sensors are capable of detecting a pressure of 1.1 Pa with a sensitivity of 76.1 kPa⁻¹, surpassing the subtle pressure sensing properties of natural skin. In situ observations indicate that such a high performance originates from the reversibly structural deformation‐dependent resistance of the Cu network during repeated pressing–release thanks to the constraining effect of the PDMS. This work opens a new strategy to fabricate transparent and flexible pressure sensors in a simple yet efficient matter.

中文翻译：

使用可穿戴压力传感器的嵌入式铜网络轻松制造超柔性透明电极

由于电子皮肤的爆炸性需求，迫切需要压力传感器。但是，当前的电阻式压力传感器需要电极材料具有复杂的多层微结构或低不透明性。这里，设计嵌入在聚二甲基硅氧烷（PDMS）衬底中的Cu网络透明电极（TE）以实现可穿戴的压力传感器。铜网络是通过氧等离子体处理辅助的裂纹模板和电镀制成的。氧等离子体处理提高了基材的表面粘附力，从而抑制了不均匀的模板开裂，并防止了电镀液渗入模板下方，从而使光电性能提高了20倍。在这种低成本的透明导电材料中，将Cu网络夹在PDMS层之间可提供最佳的灵活性。嵌入式基于Cu网络TE的压力传感器能够检测到1.1 Pa的压力，灵敏度为76.1 kPa^-1，超过了自然皮肤的微妙压力感测特性。原位观察表明，由于PDMS的约束作用，如此高的性能源于在反复压释放过程中，铜网的可逆结构依赖于变形的阻力。这项工作开启了一种新的策略，可以以简单而有效的方式制造透明而灵活的压力传感器。

更新日期：2020-02-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11