Scaling up the production of liquid metal circuits

https://techxplore.com/news/2022-08-scaling-production-liquid-metal-circuits.html

"combined the selective metal-alloy wetting with a dip coating process.

Dip-coating... facilitates deposition EGaIn... circuit layout... lithographically patterned copper traces on elastomer-coated wafers...  automated, high-precision motion system and two-layer dipping bath... EGaIn onto patterned copper wetting...  thin layer aqueous sodium hydroxide, followed by EGaIn. NaOH facilitates removal oxide skin and oxidation on surface of copper traces... immersed into bath... controlling the withdrawal speed, they successfully produced repeatable liquid metal geometries"