Journal
NATIONAL SCIENCE REVIEW
Volume 7, Issue 2, Pages 366-372Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwz168
Keywords
penetration effects; liquid metals; surface tension; porous materials; superwet
Categories
Funding
- Australian Research Council [FT130100778]
- ARC Centre of Excellence in Future Low Energy Electronics Technologies
- Australian Research Council [FT130100778] Funding Source: Australian Research Council
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Room-temperature liquid metal is discovered to be capable of penetrating through macro- and microporous materials by applying a voltage. The liquid metal penetration effects are demonstrated in various porous materials such as tissue paper, thick and fine sponges, fabrics, and meshes. The underlying mechanism is that the high surface tension of liquid metal can be significantly reduced to near-zero due to the voltage-induced oxidation of the liquid metal surface in a solution. It is the extremely low surface tension and gravity that cause the liquid metal to superwet the solid surface, leading to the penetration phenomena. These findings offer new opportunities for novel microfluidic applications and could promote further discovery of more exotic fluid states of liquid metals.
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