材料科学
液态金属
弹性体
导电体
镓
可伸缩电子设备
磁性纳米粒子
纳米技术
复合材料
导电油墨
数码产品
超声
磁流体
金属
磁场
纳米颗粒
化学工程
冶金
电气工程
工程类
物理
薄板电阻
量子力学
图层(电子)
作者
Seoyeon Kim,Sihyun Kim,Kyeongmin Hong,Michael D. Dickey,Sungjune Park
标识
DOI:10.1021/acsami.2c07618
摘要
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.
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