Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 1, Pages 6-10Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b09466
Keywords
liquid metals; gallium alloys; galvanic cells; reconfigurable devices; autonomous motion
Funding
- National Science Foundation [ECCS-1101936]
- IEEE Microwave Theory and Techniques Society Graduate Fellowship
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Presented here is a method for actuating a gallium-based liquid-metal alloy without the need for an external power supply. Liquid metal is used as an anode to drive a complementary oxygen reduction reaction, resulting in the spontaneous growth of hydrophilic gallium oxide on the liquid-metal surface, which induces flow of the liquid metal into a channel. The extent and duration of the actuation are controllable throughout the process, and the induced flow is both reversible and repeatable. This self-actuation technique can also be used to trigger other electrokinetic or fluidic mechanisms.
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