用于可写、不可润湿、可拉伸电路板和直接组装的液态金属-弹性体导体的液态金属涂层磁粉,ACS Applied Materials & Interfaces

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用于可写、不可润湿、可拉伸电路板和直接组装的液态金属-弹性体导体的液态金属涂层磁粉
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-08-05 , DOI: 10.1021/acsami.2c07618
Seoyeon Kim ₁ , Sihyun Kim ₁ , Kyeongmin Hong ₁ , Michael D Dickey ₂ , Sungjune Park ₁

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液态金属是一种很有前途的导体材料，可用于生产柔软且可拉伸的电路“板”，通过电连接和机械支撑电子元件，可以实现下一代电子产品。虽然液态金属通常可用于制造柔软和可拉伸的电路，但磁性液态金属很有吸引力，因为它可以通过外部磁场用于自愈电子设备和致动器。液态金属可以制成颗粒，然后通过超声处理可用于传感器和催化剂。我们使用此功能生产“新型”导电和磁性颗粒。将铁磁性铁颗粒混合到液态金属（镓）中会产生导电的铁磁流体，通过超声处理可以将其转化为涂有镓的铁颗粒。颗粒的镓壳极其柔软，而刚性铁芯可以响应机械压力产生高摩擦力；因此，当颗粒作为薄膜浇铸在弹性基板上时，颗粒的手工烧结可用于直接写入导电迹线。颗粒的表面形貌可以通过在去离子水中通过超声处理形成 GaOOH 晶体来控制，从而产生不可润湿的电路板。这些涂有镓的铁颗粒分散在未固化的弹性体中，可以通过施加磁场组装形成导电微线。颗粒的表面形貌可以通过在去离子水中通过超声处理形成 GaOOH 晶体来控制，从而产生不可润湿的电路板。这些涂有镓的铁颗粒分散在未固化的弹性体中，可以通过施加磁场组装形成导电微线。颗粒的表面形貌可以通过在去离子水中通过超声处理形成 GaOOH 晶体来控制，从而产生不可润湿的电路板。这些涂有镓的铁颗粒分散在未固化的弹性体中，可以通过施加磁场组装形成导电微线。

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Liquid-Metal-Coated Magnetic Particles toward Writable, Nonwettable, Stretchable Circuit Boards, and Directly Assembled Liquid Metal-Elastomer Conductors

Liquid metal is a promising conductor material for producing soft and stretchable circuit “boards” that can enable next-generation electronics by electrically connecting and mechanically supporting electronic components. While liquid metal in general can be used to fabricate soft and stretchable circuits, magnetic liquid metal is appealing because it can be used for self-healing electronics and actuators by external magnetic fields. Liquid metal can be rendered into particles that can then be used for sensors and catalysts through sonication. We used this feature to produce “novel” conductive and magnetic particles. Mixing ferromagnetic iron particles into the liquid metal (gallium) produces conductive ferrofluids that can be rendered into gallium-coated iron particles by sonication. The gallium shell of the particles is extremely soft, while the rigid iron core can induce high friction in response to mechanical pressure; thus, hand-sintering of the particles can be used to directly write the conductive traces when the particles are cast as a film on elastic substrates. The surface topography of the particles can be manipulated by forming GaOOH crystals through sonication in DI water, thus resulting in nonwettable circuit boards. These gallium-coated iron particles dispersed in uncured elastomer can be assembled to form conductive microwires with the application of magnetic fields.

更新日期：2022-08-05

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