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Published Online: 02 June 2016
Accepted: May 2016

Jumping liquid metal droplet in electrolyte triggered by solid metal particles

Appl. Phys. Lett. 108, 223901 (2016); https://doi.org/10.1063/1.4953157
Jianbo Tang1,2, Junjie Wang1, Jing Liu1, a), and Yuan Zhou1, a)
more...View Affiliations
Abstract
We report the electron discharge effect due to point contact between liquid metal and solid metal particles in electrolyte. Adding nickel particles induces drastic hydrogen generating and intermittent jumping of a sub-millimeter EGaIn droplet in NaOH solution. Observations from different orientations disclose that such jumping behavior is triggered by pressurized bubbles under the assistance of interfacial interactions. Hydrogen evolution around particles provides clear evidence that such electric instability originates from the varied electric potential and morphology between the two metallic materials. The point-contact-induced charge concentration significantly enhances the near-surface electric field intensity at the particle tips and thus causes electric breakdown of the electrolyte.
We thank Professor W. Fu from Technical Institute of Physics and Chemistry, CAS, and Professor W. Chen from China Electric Power Research Institute for their helpful discussions. J.T. acknowledges J. Li for his assistance in AFM measurement. This work was partially supported by the Dean's Research Funding of the Chinese Academy of Sciences.

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  42. Published by AIP Publishing.

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