Journal
ADVANCED INTELLIGENT SYSTEMS
Volume 3, Issue 8, Pages -Publisher
WILEY
DOI: 10.1002/aisy.202100024
Keywords
eutectic gallium indium; electrochemical oxidation; gallium; liquid metals; surface tension
Ask authors/readers for more resources
Recent studies have shown that electrochemical oxidation can significantly decrease the interfacial tension of liquid metals, from approximately 500 mN m(-1) at 0 V to approximately 0 mN m(-1) at less than 1 V. This reversible and controllable change in tension surpasses what is achievable through conventional electrocapillarity or surfactants. The report aims to introduce beginners to this field, clarify misconceptions, and discuss applications and future challenges related to modulating the interfacial tension of liquid metals.
Herein, this progress report summarizes recent studies of electrochemical oxidation to modulate the interfacial tension of gallium-based alloys. These liquid alloys have the largest interfacial tension of any liquid at room temperature. The ability to modulate the tension offers the possibility to create forces that change the shape and position of small volumes of liquid metal. It has been known since the late 1800s that electrocapillarity-the use of potential to modulate the electric double layer on the surface of metals in electrolyte-lowers the interfacial tension of liquid metals. This phenomenon, however, can only achieve modest changes in interfacial tension since it is limited to potentials that avoid Faradaic reactions. A recent discovery suggests reactions driven by the electrochemical oxidation of gallium alloys cause the interfacial tension to decrease from approximate to 500 mN m(-1) at 0 V to approximate to 0 mN m(-1) at less than 1 V. This change in interfacial tension is reversible, controllable, and goes well-beyond what is possible via conventional electrocapillarity or surfactants. This report aims to introduce beginners to this field and address misconceptions. The report discusses applications that utilize modulations in interfacial tension of liquid metal and concludes with remaining opportunities and challenges needing further investigation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available