Graphene Film Efficiently Cools Electronics Better Than Copper

Scientists at Chalmers University of Technology have conducted a new experiment demonstrating how graphene film keeps your electronics cool. The science professors based their finding on the fact that silicon-based components of our electronic devices may be coated with a graphene layer to keep temperature at lower levels during usage.

Graphene is an allotrope (from allotropy: ability of chemical elements to exist in more than two forms) of carbon in the form of a two-dimensional, atomic-scale, hexagonal lattice in which one atom forms each vertex. It has many extraordinary properties – being about 200 times stronger than steel by weight, it conducts heat and electricity with great efficiency and is nearly transparent.

Scientists have long struggled to come up with new ways to keep electronic devices cool – particularly during the summer – when overheating makes devices slow. Previous attempts involved the addition of internal and external fans, but their performance left much to be desired. However, now a revolutionary technological experiment proves that devices can be kept cool with a much easier technique. According to the Chalmers University of Technology, all gadgets need to lower their temperature is a graphene film that is adhered to their internal components.

To reach this conclusion, experts have tested different layers of graphene, each with their own conductivity. The first attempts were not as successful because the thermal atoms that are responsible for the conductivity of the graphene film allowed only limited cooling of the electronic systems.

The second test presupposed the introduction of supplementary layers of graphene films. However, the more layers scientists added, the harder it became for the band to adhere to silicon components. As a consequence, scientists had to come up with a compound that enabled them to increase adhesion between the graphene layer and the silicon.

Based on the description provided by science professor Johan Liu at the said university, a covalent bond including silicon was created to keep the graphene layer attached to the electronic component. Additives based on Triethoxysilane molecules turned out to be a lot more effective than the regular Van Der Waals bonds because the silane bonds they have created kept the graphene film in place for a longer period of time.

Further tests have shown that graphene is four times more effective than copper as it can halve the temperature of gadgets. For the current experiment, scientists used a 20 micrometer-wide film, which is capable of producing a thermal conductivity of 1600 W/mK, science experts have specified.

Graphene films have been used previously to lower the temperature of LED bulbs, but Dr. Liu believes these components may bring additional benefits to microelectronic devices. In his opinion, it won’t be long until the graphene film is added to all electronics to render them smaller, faster and energy-efficient.


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