Origami Circuit Boards Let You Fold Electronics into Shape

Researchers at City University of Hong Kong developed a paper-like material impregnated with liquid metal that becomes conductive when folded or cut, creating circuit traces without molds. The material costs about $1.80 for a 10x10 cm piece and achieves resistances of 23.18 Ω/cm for cut edges and 4.4 Ω/cm for folded edges. This technique aims to simplify crafting hybrid paper objects with integrated LEDs and motors, bridging traditional handicrafts with modern electronics.