New technology to allow more stable graphene touch ten minutes of ozone function unchanged
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New technology to allow more stable graphene touch ten minutes of ozone function unchanged
Russia, France, Sweden and Greece scientists developed a technology to purify graphene, a new approach to make graphene more stable, even if the touch of ozone for 10 minutes is unharmed". Researchers show that the effect is a major advance in the field of nanotechnology, will vigorously promote the development of the category.
Graphene is a thinner than a human hair 1 million times, a single layer of carbon atoms arranged in a honeycomb structure which has high conductivity, durability and ductility etc., can be used in the manufacture of a variety of Nano Electronics equipment. In the production process, the polymer coating residue will be "contaminated" graphene, decreased the flow of its internal load. Thermal annealing, plasma, and chemical solvents can remove the residual polymer, but also weaken the purity of graphene. Among them, one of the most commonly used is the use of ozone purification method, this approach in spite of high reaction, but the residual ozone in the polymer, while the formation of defects in graphene, resulting in weakening its function.
In view of this, the Russian National University nuclear research Moscow Engineering Physics Institute (MEPhI) scientists used the high temperature silicon carbide (SiC) has been successfully improved, graphene has high stability, the graphene and ozone touch more than 10 minutes function unchanged; and ordinary graphene in the same environment for three to four minutes impaired function.
In order to check the experimental results, Greek, French and Swedish scientists, through computer modeling to clarify why SiC graphene can still scratch on oxygen free radical violent effect, and more secure: the stability of the new graphene were obvious and silicon carbide base epitaxial graphene roughness is related to the poor.
The latest discovery will help to purify graphene very well, and then obtain high quality industrial graphene with stable electrical characteristics.
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