Effect of substrate surface roughness on electric current induced flow of liquid metals
- 4 February 2013
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 102 (5), 054101
- https://doi.org/10.1063/1.4790182
Abstract
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.This publication has 18 references indexed in Scilit:
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