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Facile and Rapid Method for Fabricating Liquid Metal Electrodes with Highly Precise Patterns via One-Step Coating

机译:通过一步涂层具有高精度图案的液体金属电极的容纳和快速方法

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摘要

Gallium-based alloys, which are virtually non-toxic liquid metals at room temperature, are considered highly promising electrode materials for state-of-the-art electronics with new form factors. Herein, a facile and rapid method to fabricate liquid metal electrodes with highly precise patterns via a onestep coating is presented. For this work, polymeric stencil masks with dual structures, comprising upper and lower structures for injecting and molding the liquid metal, respectively, are used for direct patterning of the liquid metal via spray deposition for few seconds, enabling the formation of complex and minute patterns including long thin lines and hollow forms. This method can be adapted to 3D substrates of various materials without any surface treatment, owing to the intrinsic adhesive and flexible properties of the polymeric masks ensuring conformal contact with non-flat surfaces, and is also expected to be applicable to sub-micron patterns. In addition, a number of highly flexible/stretchable electronic applications, exhibiting no change in electrical conductivity upon consecutive structural deformations, are demonstrated on various substrates including human skin. It is anticipated that these results will not only spur the further development of flexible/stretchable electronics, but also significantly contribute to the innovative on-site fabrication of wearable electronics with high durability.
机译:镓的合金在室温下几乎无毒的液态金属,被认为是最先进的电子产品具有新的形状因素的高度有前途的电极材料。这里,提出了一种通过肿大的涂层制造具有高精度图案的液体金属电极的容易和快速的方法。对于该作品,具有双结构的聚合物模板掩模,包括用于注射和模制液态金属的上下结构,用于通过喷涂沉积直接图案化液态金属几秒钟,从而形成复杂和微小图案的形成包括长的细线和空心形式。该方法可以适用于各种材料的3D基板,而没有任何表面处理,由于固体掩模的固有粘合剂和柔性性能,确保与非平坦表面的共形接触,并且还期望适用于亚微米图案。另外,在包括人体皮肤的各种基板上证明了许多高度灵活/可拉伸的电子应用,在连续结构变形上表现出导电性的变化。预计这些结果不仅会促进柔性/可拉伸电子产品的进一步发展,而且还显着促进了具有高耐用性的可穿戴电子产品的创新现场制造。

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