Graphene film can super cool LEDs Researchers at Chalmers University of Technology have developed a method for efficiently cooling electronics using graphene-based film.According to the researchers, the graphene film has a thermal conductivity capacity that is four times that of copper.Significantly the team has developed a graphene film that  can be attached to silicon substrates.Research team leader Johan Liu, professor at Chalmers University of Technology, writes:The stronger bonds result from so-called functionalisation of the graphene, i.e. the addition of a property-altering molecule. Having tested several different additives, the Chalmers researchers concluded that an addition of (3-Aminopropyl) triethoxysilane (APTES) molecules has the most desired effect.When heated and put through hydrolysis, it creates so-called silane bonds between the graphene and the electronic component (see picture).The researchers have shown that the in-plane thermal conductivity of the graphene-based film, with 20 micrometer thickness, can reach a thermal conductivity value of 1600 W/mK, which is four times that of copper.A likely application says Johan Liu is the integration of graphene-based film into LEDs, lasers and radio frequency components for cooling purposes.