#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 desired the most 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. s
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