
Researchers at Chalmers University of Technology have developed a method for efficiently cooling electronics using graphene-based film. The film has a thermal conductivity capacity that is four times that of copper. Moreover, the graphene film is attachable to electronic components made of silicon, which favours the film’s performance compared to typical graphene characteristics shown in previous, similar experiments.
Electronic systems available today accumulate a great deal of heat, mostly due to the ever-increasing demand on functionality. Getting rid of excess heat in efficient ways is imperative to prolonging electronic lifespan, and would also lead to a considerable reduction in energy usage. According to an American study, approximately half the energy required to run computer servers, is used for cooling purposes alone.
A couple of years ago, a research team led by Johan Liu, professor at Chalmers University of Technology, were the first to show that graphene can have a cooling effect on silicon-based electronics. That was the starting point for researchers conducting research on the cooling of silicon-based electronics using graphene.
“But the methods that have been in place so far have presented the researchers with problems”, Johan Liu says. “It has become evident that those methods cannot be used to rid electronic devices off great amounts of heat, because they have consisted only of a few layers of thermal conductive atoms. When you try to add more layers of graphene, another problem arises, a problem with adhesiveness. After having increased the amount of layers, the graphene no longer will adhere to the surface, since the adhesion is held together only by weak van der Waals bonds.”
“We have now solved this problem by managing to create strong covalent bonds between the graphene film and the surface, which is an electronic component made of silicon,” he continues.
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).
Moreover, functionalisation using silane coupling doubles the thermal conductivity of the graphene. 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.
“Increased thermal capacity could lead to several new applications for graphene,” says Johan Liu. “One example is the integration of graphene-based film into microelectronic devices and systems, such as highly efficient Light Emitting Diodes (LEDs), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics.”
Read more: Graphene-based film can be used for efficient cooling of electronics
The Latest on: Graphene-based film
[google_news title=”” keyword=”graphene-based film” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Graphene-based film
- Graphene Plasmon: NTT and Univ. of Tokyo Control THz-Region for High-Speed Signal Processingon July 24, 2024 at 9:13 am
NTT Corporation and The University of Tokyo announced they have generated and controlled graphene plasmon wave packets with a pulse width of 1.2 picoseconds. They said this offers a novel approach to ...
- Breakthrough Graphene Technology Revolutionizes Hydrogen Fuel Cells and Computingon July 23, 2024 at 9:09 pm
Scientists from Khalifa University and the University of Manchester have developed a groundbreaking graphene device that can transform hydrogen fuel cells, computing, and catalysis. The research ...
- Researchers at Khalifa University, University of Manchester lead breakthrough with Graphene in next-generation technologieson July 23, 2024 at 5:55 pm
Researchers from the Khalifa University of Science and Technology Researchamp;Innovation Centre for Graphene and 2D Materials (RIC2D) and the Research Innovation ...
- Innovative natural polymer-based graphene film paves way for wearable techon July 18, 2024 at 5:00 am
Researchers at the BITS Pilani, Hyderabad Campus, claim to have developed a graphene-like material film with enhanced electrical conductivity ... Various graphene-based materials, such as graphene ...
- Enhancing Graphene Photodetectors with PQDs and Siliconon July 6, 2024 at 6:34 pm
Doping modulates the band structure and carrier density of graphene-based photodetectors to significantly ... PQDs are coated over a graphene film to synthesize a graphene/PQD hybrid architecture.
- Graphene paints a corrosion-free futureon April 17, 2024 at 5:46 am
A thin layer of graphene paint can make impermeable and chemically resistant coatings which could be used for packaging to keep food fresh for longer and protect metal structures against corrosion, ...
- Global Graphene Companies – Manufacturers and Supplierson June 29, 2022 at 4:59 am
The company design and manufactures various graphene-based products such as its patented graphene heating film, including graphene powder coatings. Graphene 3D Labs, Inc. is focused on the development ...
- Worldwide Graphene Databaseon September 10, 2017 at 11:47 am
For instance, graphene-based nanomaterials have many promising applications in ... 2\"x2\" Matexcel 3D Multilayer Graphene Film on Nickel Foam, 2\"x2\" Matexcel 3D Multilayer Graphene Film on Nickel ...
- Making graphene on a large scaleon April 1, 2009 at 5:00 am
The three approaches are similar to each other, and also similar to previous work on the deposition of nanometre-thick graphite films on nickel ... production of graphene-based electronic and ...
via Bing News