A simple, inexpensive spray method that deposits a graphene film can heal manufacturing defects and produce a high quality graphene layer on a range of substrates, researchers claim. The study conducted by researchers at the University of Illinois at Chicago and Korea University - is available online in Advanced Functional Materials.
Graphene is strong, transparent, and an excellent conductor of electricity with potential in a wide range of applications, such as reinforcing and lending electrical properties to plastics; creating denser and faster integrated circuits; and building better touch screens.Although the potential uses for graphene seem limitless, there has been no easy way to scale up from microscopic to large-scale applications without introducing defects, said Alexander Yarin, UIC professor of mechanical and industrial engineering and co-principal investigator on the study. Although the potential uses for graphene seem limitless, there has been no easy way to scale up from microscopic to large-scale applications without introducing defects, said Alexander Yarin, UIC professor of mechanical and industrial engineering and co-principal investigator on the study. Normally, graphene is produced in small flakes, and even these small flakes have defects. When one tries to deposit them onto a large-scale area, defects increase, and the graphene useful properties are lost. Dr. Yoon had been working with a unique kinetic spray deposition system that exploits the supersonic acceleration of droplets through a Laval nozzle. Although Yoon was working with different materials, Dr. Yarin concluded that his method might be used to deposit graphene flakes into a smooth layer.
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