Recently, Jiang Xingyu, a researcher at the National Nanoscience Center of the Chinese Academy of Sciences, has combined microfluidics and liquid metals to develop a method for manufacturing flexible electronic devices on a large scale. Screen printing, inkjet printing, microfluidics and other methods can be used in various ways. A circuit with high conductivity, high elasticity and high biocompatibility is obtained on the base material. The research is expected to be widely used in the development of new fields such as wearable devices, implantable devices and flexible robots. Related research results were published online by iScience magazine on the subject of Printable Metal-Polymer Conductors for Highly Stretchable Bio-Devices. Liquid metal alloys such as gallium not only have fluidity at room temperature, but also current can flow in them, making them ideal materials for stretchable devices and circuits. However, liquid metal has a huge surface energy (difficult to spread), and its surface will spontaneously form an insulating oxide film, which makes the printing of liquid metal on various substrates has been a problem. In order to overcome the surface energy of liquid metal and efficiently break the oxide film on the surface of liquid metal particles, Jiang Xingyu's group used liquid metal particle printing-polymer casting-polymer peeling method to obtain highly conductive and highly elastic liquid metal- Polymer compound. On the surface of the composite, "islands" of liquid metal are distributed in the "ocean" of polymers, and the "islands" of liquid metal realize the connection with external devices; while inside the composite, there is a stream of liquid metal in all directions. ", The river guarantees the compound's high electrical conductivity and high elasticity. The entire preparation process can be carried out at room temperature to avoid the destruction of the polymer substrate by high temperature. Jiang Xingyu's research group printed the compound on an elastic silicone substrate to make a highly elastic circuit. The circuit will not fail under extreme strain conditions (> 500%). They also printed the compound on latex gloves to make keyboard gloves, which not only monitored hand movements, but also enabled character input. Jiang Xingyu's research group further made the compound into an electro-transfected bioelectrode to achieve efficient transfection of living cell genes. This research is expected to greatly increase the elasticity of circuits, reduce the manufacturing cost of flexible stretchable circuits, and also promote the development and application of new fields such as wearable devices, implantable devices, and flexible robots. The research was supported by the National Natural Science Foundation of China and the Ministry of Science and Technology of the People's Republic of China. Heavy Hex Bolts, Heavy Hex Structural Bolts, Hex Shoulder Bolt Ningbo Brightfast Machinery Industry Trade Co.,Ltd , https://www.brightfastener.com
