Scientists have discovered a revolutionary method to keep electronics cool. 3D white graphene structures are an excellent means of keeping temperatures down.
White graphene is actually boron nitride and it is different from the carbon-based graphene. Shortly after graphene films have been proved to show a tremendous capacity of keeping electronics cool in a research project conducted at the Chalmers University of Technology, a team of researchers from Rice University have found a new and improved method that provides even better results.
The graphene film method uses multiple graphene layers that are glued together with a specialized adhesive substance. The Chalmers team has based its project on the hypothesis that if one layer of graphene can successfully keep temperatures down, then several layers will be even better at doing that. This is where the Rise University team found a significant improvement.
“One of the drawbacks in electronics, especially when you have layered materials on a substrate, is that heat moves very quickly in one direction, along a conductive plane, but not so good from layer to layer. Multiple stacked graphene layers is a good example of this.” says researcher Rouzbeh Shahsavari.
And so, Rouzbeh Shahsavari and his colleague Navid Sakhavand have devised a boron nitride system that would use a loophole in this theory in order to get better results. Instead of gluing the white graphene layers one to another, the Rice team tried adding boron nitride nanotubules between them. By using a tubular structure made out of the same material as the layers themselves, the heat could be transferred much better than through layers that are glued together.
They tried different heights and widths for the nanotubules, until they found the perfect shape that could be integrated in this 3D white graphene structure. It features several layers of boron nitride that are connected by the nanotubules.
While both materials are exceptional heat conductors, white graphene has a very important advantage. It is that is a tremendous insulator, which means that it it does not conduct electricity. Graphene on the other hand is a good conductor for electricity.
The Rice University 3D white graphene method could ensure that electronic parts of various gadgets and devices will stay cool, even without the use of fanning and other space consuming methods. And this is a very import feature, since one of the aims of modern technology is to keep devices as small as possible.
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