Researchers in Beijing have developed an innovative method for applying liquid metal to everyday materials like paper and plastic, potentially transforming them into “smart devices.” Published in Cell Reports Physical Science, the study addresses the challenge of liquid metal’s high surface tension, which has historically made adhesion to non-wetting surfaces difficult. The novel technique focuses on pressure application rather than using binding materials, which avoids the complications associated with previous methods like transfer printing. The researchers successfully coated paper with liquid metals while maintaining the substrate’s properties, even allowing it to be folded without losing functionality.
Through trial and error, the team identified optimal parameters for achieving stable adhesion by varying the force applied during application. Although the current method may allow the liquid metal coating to be easily removed, the researchers aim to enhance stability and expand its applicability to other surfaces such as metal and ceramics. The project holds promise for future developments in wearable technology, flexible devices, and soft robotics, demonstrating significant potential in the realm of electronic materials. Further research will focus on constructing actual smart devices using these newly treated materials.
