Aerosol Spray Deposition of Liquid Metal and Elastomer Coatings for Rapid Processing of Stretchable Electronics.
Aerosol Spray Deposition of Liquid Metal and Elastomer Coatings for Rapid Processing of Stretchable Electronics.
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DOI：
10.3390/mi12020146
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发表时间：
2021-02-01
期刊：
影响因子：
3.4
通讯作者：
Dickey MD
中科院分区：
文献类型：
--
作者：
Neumann TV;Kara B;Sargolzaeiaval Y;Im S;Ma J;Yang J;Ozturk MC;Dickey MD
我们报告了一种喷雾沉积技术，用于将液态金属合金图图化以形成可拉伸导体，然后可以通过相同的喷涂程序将其封装在硅弹性体中。虽然喷涂以前已经用于沉积许多材料，包括液态金属，但这项工作的重点是量化喷涂过程并将其与有机硅相结合。喷射产生液态金属微粒（直径~5 μm），这些微粒通过模板上的开口，在基板上产生高分辨率的迹线（使用工艺刀具的模板分辨率~300 μm）。喷射产生足够的动能（~14 m/s），使颗粒在撞击时扭曲，从而使它们融合在一起。这个合并过程取决于颗粒的大小和速度。相似大小的颗粒在制成薄膜时不会合并。同样，以相同速度移动的较小颗粒（<1 μ m）也不会在撞击时破裂，尽管计算表明这些颗粒可能在更高的速度下破裂。液态金属特征可以通过从挥发性溶剂中喷涂未固化的有机硅弹性体来包裹，以形成在喷涂期间不破坏液态金属特征的保形涂层。液态金属和弹性体的交替层可以按顺序进行图案化，以构建多层器件，例如软的和可拉伸的传感器。
We report a spray deposition technique for patterning liquid metal alloys to form stretchable conductors, which can then be encapsulated in silicone elastomers via the same spraying procedure. While spraying has been used previously to deposit many materials, including liquid metals, this work focuses on quantifying the spraying process and combining it with silicones. Spraying generates liquid metal microparticles (~5 μm diameter) that pass through openings in a stencil to produce traces with high resolution (~300 µm resolution using stencils from a craft cutter) on a substrate. The spraying produces sufficient kinetic energy (~14 m/s) to distort the particles on impact, which allows them to merge together. This merging process depends on both particle size and velocity. Particles of similar size do not merge when cast as a film. Likewise, smaller particles (<1 µm) moving at the same speed do not rupture on impact either, though calculations suggest that such particles could rupture at higher velocities. The liquid metal features can be encased by spraying uncured silicone elastomer from a volatile solvent to form a conformal coating that does not disrupt the liquid metal features during spraying. Alternating layers of liquid metal and elastomer may be patterned sequentially to build multilayer devices, such as soft and stretchable sensors.
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影响因子：
4.6
作者：
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