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
- 23 features set to compete in Annecy, the world capital of animated filmson April 26, 2024 at 4:46 am
Claude Barras, Jean-François Laguionie, Michel Hazanavicius, Gints Zilbalodis, María Trénor, and the duo Vincent Paronnaud - Alexis Ducord are competing for the Cristal award ...
- Revolutionary Video Footage Depicts Protein and Lipid Interactions As Never Seen Beforeon April 24, 2024 at 4:43 pm
The bustling environments of our cells are a dance floor where proteins and lipids perform an intricate ballet, essential for life. A research team has recorded this microscopic performance for the ...
- Mechanical strain control of quantum transport in graphene enables new class of nanoelectronic deviceson April 23, 2024 at 5:00 pm
Their data again agreed with modeling based on the theory of strain-induced gauge fields in graphene. The results demonstrate that by employing strain as a knob to control electron wave interference, ...
- Scientists stencil-paint carbon nanotube components for flexible transparent electronicson April 23, 2024 at 9:23 am
Researchers from Skoltech, MIPT, and elsewhere have found a fast and inexpensive way to create geometric patterns in carbon nanotube films. The resulting films turned out to have superior properties ...
- Electron Videography Captures Microscopic Moving Dance in Cell Membraneson April 23, 2024 at 2:17 am
In a first demonstration of “electron videography,” researchers have captured a microscopic moving picture of the delicate dance between proteins and lipids found in cell membranes.
- Electron videography captures moving dance between proteins and lipidson April 22, 2024 at 1:55 pm
In a first demonstration of "electron videography," researchers have captured a microscopic moving picture of the delicate dance between proteins and lipids found in cell membranes. The technique can ...
- Dalek set to storm Windermere Science Festival!on April 19, 2024 at 9:22 am
The founder of downthetubes, which he established in 1998. John works as a comics and magazine editor, writer, and on promotional work for the Lakes International Comic Art Festival. He is currently ...
- Histology and Cytology Market Size, Demand, Share, Key Players, Revenue, Report and Forecast to 2024 to 2032on April 18, 2024 at 9:28 pm
Request To Download Free Sample of This Strategic Report @- Histology and Cytology Market is valued approximately at USD 12.5 billion in 2019 and is anticipated to grow with a healthy growth rate of ...
- The Latest Breakthroughs in Quantum Computingon April 17, 2024 at 11:29 pm
While there’s really nothing like the quantum world to make you feel unintelligent, it’s good to know that there are scientists around the world to whom this stuff makes sense. Quantum physics is hard ...
- Scientists create gold foil with thickness of one atomon April 17, 2024 at 9:20 am
For the first time, Swedish scientists from the University of Linkoping managed to create a two—dimensional form of gold - a film with a thickness of one atom. The new material was named golden by ...
via Bing News