Single layers of carbon atoms, known as graphene sheets, are light-weight, strong, semi-conducting but also very challenging and expensive to prepare.
Single layers of carbon atoms, known as graphene sheets, are light-weight, strong, semi-conducting but also very challenging and expensive to prepare.
Now, a research team from Cornell University (New York, USA) has developed an easy method for making graphene-based electronic devices by "growing" the graphene layer directly on top of a piece of silicon. The research findings were recently published in the scientific journal Nano Letters.
Graphene, in general, is presented by researchers as an effective alternative to silicon in electronic components, thanks to its extraordinary strength and advanced electronic properties. However, the production of graphene on a commercial scale is challenging, and scientists have even resorted to crude and indelicate methods such as the use of transparent adhesive paper to tear off a single layer of graphene from graphite - the material found in pencil tips. Such methods will never be suitable for the industrial field, especially since they will receive varying numbers of layers in different locations.
"You can imagine trying to tear off a piece of thick plastic wrap over a plate to place it over another plate, the task can be quite frustrating," says lead researcher Jiwoong Park, a professor of chemistry and chemical biology at Cornell University.
Taking inspiration from previous research where scientists grew graphene layers from copper foil, the team grew the graphene directly into pieces of tin coated with special vaporizable copper layers. They then cut the graphene layers into their desired shape using standard methods such as photolithography, while removing the copper using a suitable chemical solution. The finished product was a layer of graphene that was anchored to the mold piece with almost no structural defects.
"Once the graphene is anchored to this piece, you can use any method of processing thin layers," explains the researcher.
The research team is now examining the possibility of producing pieces of graphene with a size of ten square centimeters, at full scale, which will further demonstrate the production potential of graphene-based electronic components.
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Concrete lasts 1000 years why replace it
Regarding one core not the most practical
Because there are interactive operations that require the full heart node of the processor for many short periods
And there are actions behind the scenes such as backup, raid, emule, which need a little but constant processor time
What people don't look around you will find a substitute for concrete
When they find a way for the commercial production of graphene there is no doubt that it will replace the mold. There was already an article about processors that reach terahertz with the help of graphene and I think we will return to the method of a single core in processors that gets stronger with each new generation of processors and inserting more and more components such as the video card and the various controllers into the processor until they reach the status of a complete system on a single chip