Tension-driven CHARM3D uses Field's metal to fabricate 3D self-healing electronic circuits

https://techxplore.com/news/2024-07-technique-fabricate-dimensional-circuits-advanced.html

"Field's metal: indium, bismuth, tin eutectic alloy melts (62°C)/ freezes at temperature lower than their constituent, attractive for 3D printing... high electrical conductivity, low toxicity, solidifies rapidly avoiding need for support materials/ external pressure... uniform, smooth microwire structures with adjustable widths 100 - 300 µm... faster printing speeds (100 mm/sec), higher resolutions... structures free-standing, self-healing... contact-free wearable sensors, 3D antennas, electromagnetic metamaterials"

Related: Novel etching technique enhances absorptivity of powders for metal 3D-printing
https://phys.org/news/2024-10-etching-technique-absorptivity-powders-metal.html