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Voltage-induced penetration effect in liquid metals at room temperature

Journal Article


Abstract


  • 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.

Publication Date


  • 2020

Citation


  • Yun, F. F., Yu, Z., He, Y., Jiang, L., Wang, Z., Gu, H., & Wang, X. (2020). Voltage-induced penetration effect in liquid metals at room temperature. National Science Review, 7(2), 366-372. doi:10.1093/nsr/nwz168

Scopus Eid


  • 2-s2.0-85083955922

Start Page


  • 366

End Page


  • 372

Volume


  • 7

Issue


  • 2

Abstract


  • 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.

Publication Date


  • 2020

Citation


  • Yun, F. F., Yu, Z., He, Y., Jiang, L., Wang, Z., Gu, H., & Wang, X. (2020). Voltage-induced penetration effect in liquid metals at room temperature. National Science Review, 7(2), 366-372. doi:10.1093/nsr/nwz168

Scopus Eid


  • 2-s2.0-85083955922

Start Page


  • 366

End Page


  • 372

Volume


  • 7

Issue


  • 2