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Type:Industry News  Time:2011/11/13 20:27:45  Read:

As reported, British scientist developed a kind of films which is only of an atom’s thickness using a matter called graphene. It is, in present world, the material with highest intensity that can withstand severe stress. It can be used to create the worlds smallest transistor.
This achievement is expected to bring breaks to the development of ultrahighspeed computer chips, and it is also very useful to medical technology. Professor Andre Geim and Dr.Kostya Novoselov University of Manchester published on this month’s Natural Matter Journal their cooperation with the German Max Planck Institute on the production of a kind of transistor using graphitefilm. This transistor is only one atom thick, less than 50 atoms in width. Graphitefilm can be used to make ultraspeed computer chips, and graphite transistor can be used to make microprocessor. At present, silica chips are in the process of minimizing, but silica represented an unstable property in smaller size, which is the bottle neck for the technique. Scientists believe that, if graphite film can solve this problem, computer chips will be minimized in size and process speed will be faster in great extend.In addition, the graphitefilm can also be used in the manufacture of microfilter for decomposition of gas. In medical field, this one atom think film can be used to support molecule to be inspected and analyzed under electronic microscope, which is a great help to promote the development of new medical research. As reported by the Reference News of Aug.17, graphite can also be used to make bulletproof vests, paper and the space elevator in future.
It is an important problem whether mass production is possible. Graphitefilm of an atom thickness will hard to manufacture. Recently, the U.S. Brookhaven National Laboratory found an approach for production of a highquality graphitesheet. Matrix used by Brookhaven is a rare metal ruthenium. To start, researchers let carbon atoms infiltrate into ruthenium in 1150℃ , when cooling to 850℃ , a large number of carbon atoms absorbed previously will float to the surface of ruthenium. The singlelensshaped carbon atoms "island" covered the entire surface of the matrix. They may eventually grow into a fullgraphite. After the first layer covering reaches 80%, the second layer growth starts. The bottom of the graphiteruthenium has a strong reaction, and will entirely be separated from ruthenium after the second layer, leaving only weak electric connections. This secondgraphite retains the inherent electronic structure, which is satisfactory.
Graphene material is the hopeful star in electronics industry and the hot spot in recent years’ scientific research. For example, its carrier is good in mobility, electrons may move freely in it; it can also react with a single gas molecules, which allow it to act as a receptor for the detection of materials.
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Qingdao Hensen Graphite Co., Ltd|Spherical graphite|AA Method High Purity|Expandable Graphite