New method converts tree leaf into Electronic devices
BEIJING: Scientists have discovered a new method to convert dried tree leaves into a porous carbon material that can be used to produce high-tech electronics. Researchers from the OILU University of technology, in China used a multi-step, yet simple process to convert phoenix tree leaves into a form that could be incorporated into electrodes as active materials. The dried leaves were first ground into a powder, then heated to 220 degree Celsius for 12 hours. This produced a powder composed of tiny carbon micro-spheres.
These micro-spheres were then treated with a solution of potassium hydroxide and heated by increasing the temperature in a series of jumps from 450 to 800 degree Celsius. The chemical treatment corrodes the surface of the carbon micro-spheres, making them extremely porous. The final product, a black carbon powder, has a very high surface area due to the presence of many tiny pores that have been chemically etched on the surface of the micro-spheres.
Later these particles are fabricated into electronic sheets, which acts as a conductor of electricity.
