The first graphene touchscreen
A group of researchers from Korea and Japan announced that they had found an easy way to commercially produce a two-dimensional graphene film. This material is cheaper, more transparent and durable than indium tin oxide (ITO), which is now used as a transparent conductor. Graphene is generally not subject to any decay and has an unlimited service life. The raw materials for production are practically free.
Graphene is a carbon film only 1 atom thick, in which carbon atoms form a hexagonal lattice similar to a honeycomb. Graphene film was discovered in 2005 by a group of scientists from the University of Manchester (Novoselov, Geim, Morozov, etc.). Five years after the discovery, it seems that the first acceptable method of its production has been found.
It turns out that graphene can be stabilized using standard roller technology used, for example, in the printing of newspapers and magazines. In this process, hydrocarbon feedstock is deposited on a smooth plate of copper by the method of reactive chemical precipitation. Top coated with adhesive polymer. Then the copper substrate is etched, and graphene is glued onto plastic sheets (PET) or another surface.
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During the experiment, scientists from Korea and Japan received a rectangular sheet with a diagonal of 76 cm (in the photo on the left).
In this way, even several layers of graphene can be applied one on another - and we get a plastic with a graphene coating that can be cut into touchscreens of any size. According to experts, the commercial release of devices may begin in the coming years.
Touchscreens are just the beginning. The fact is that when graphene is rolled into a cylinder, a single-walled nanotube is obtained. If you find a good way of industrial production of nanotubes, then graphene may create a new class of electronics with a base transistor thickness of up to 10 nm. In 2007, an experimental graphene transistor with a frequency of 30 GHz was created.
via Chemistry World
Graphene is a carbon film only 1 atom thick, in which carbon atoms form a hexagonal lattice similar to a honeycomb. Graphene film was discovered in 2005 by a group of scientists from the University of Manchester (Novoselov, Geim, Morozov, etc.). Five years after the discovery, it seems that the first acceptable method of its production has been found.
It turns out that graphene can be stabilized using standard roller technology used, for example, in the printing of newspapers and magazines. In this process, hydrocarbon feedstock is deposited on a smooth plate of copper by the method of reactive chemical precipitation. Top coated with adhesive polymer. Then the copper substrate is etched, and graphene is glued onto plastic sheets (PET) or another surface.
')
During the experiment, scientists from Korea and Japan received a rectangular sheet with a diagonal of 76 cm (in the photo on the left).
In this way, even several layers of graphene can be applied one on another - and we get a plastic with a graphene coating that can be cut into touchscreens of any size. According to experts, the commercial release of devices may begin in the coming years.
Touchscreens are just the beginning. The fact is that when graphene is rolled into a cylinder, a single-walled nanotube is obtained. If you find a good way of industrial production of nanotubes, then graphene may create a new class of electronics with a base transistor thickness of up to 10 nm. In 2007, an experimental graphene transistor with a frequency of 30 GHz was created.
via Chemistry World
Source: https://habr.com/ru/post/97039/
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