Effect of substrate surface roughness on electric current induced flow of liquid metals
Effect of substrate surface roughness on electric current induced flow of liquid metals
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基体表面粗糙度对液态金属电流感应流动的影响
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Praveen Kumar
中科院分区：
文献类型：
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作者：
S. Talukder;Nalla Somaiah;Praveen Kumar
电流可以诱导液态金属在导电衬底上长时间流动。这项工作报告了在这种流动过程中基材表面粗糙度对液态金属前沿速度的影响。实验通过将电流通过放置在约170 nm厚、500 μm宽的不同粗糙度的金和铂薄膜上的液镓来进行。因此，随后的流动类似于开放通道中的微流体行为。液前速度随基底表面粗糙度的增大而线性减小；这是由于沿液态金属-衬底界面的有效电场随着衬底表面粗糙度的减小而减小。
Electric current can induce long-range flow of liquid metals over a conducting substrate. This work reports on the effect of the substrate surface roughness on the liquid metal-front velocity during such a flow. Experiments were conducted by passing electric current through liquid gallium placed over ∼170 nm thick, 500 μm wide gold and platinum films of varying roughness. The ensuing flow, thus, resembles micro-fluidics behavior in an open-channel. The liquid-front velocity decreased linearly with the substrate surface roughness; this is attributed to the reduction in the effective electric field along the liquid metal-substrate interface with the substrate surface roughness.