Printable circuits that can work on fabric, plastic and even fruit

https://techxplore.com/news/2022-10-printable-circuits-fabric-plastic-fruit.html

"heat-transferrable thermal paper... ordinary laser printer.... hydrophobic gap air between carbon and liquid metal... prevented sticking when brushed on top... only adhered exposed parts of surface... stuck directly to smooth surface, such as a plastic soda bottle. If uneven placed on a piece of flexible plastic, then onto rougher surface... displaying images, RFID tagging, sensing temperature and sound. The researchers say that this protocol should greatly expand the applications of liquid metal circuits"