Graphene technology

WHAT IS GRAPHENE TECHNOLOGY?

The graphene technology, one of the thinnest, flexible, strong materials and with major conductivity that exist, is set to revolutionize the future, from major changes in the mobile phone industry, telecommunications or the manufacture of chips up to how to develop anti-cancer drugs.

Definitions of Graphene technology.

• Graphene technology is a single carbon atoms layer placed in a hexagonal grilles. A graphene sheets stack forms the crystal graphite.
• Graphene technology is a thin layer of pure carbon; it is a single, lattice layer of carbon atoms that are attached together in a hexagonal lattice.
• Graphene technology is a great heat conductor at room temperature and also an extraordinary electricity conductor. It is a thin and light as a sheet of paper. And also stronger than the silicon. All this at one atom thick.

The graphene technology is a substance formed by pure carbon, with atoms arranged in a regular hexagonal pattern similar to the graphite, but in a sheet of thick atoms. It is very light, weights 0, 77 milligrams.

Andre Geim and Konstantin Novoselov received the Nobel Prize in Physics 2010 award for their great discoveries about the two-dimensional graphene material.

Discovery 

The sudden increase in the scientific interest due to the graphene technology can give the impression that this is a new material. In fact is known and has been described since half a century ago. The chemical bond and the structure is described in the 1930s. Philip Russell Wallace calculed for the first time (in 1949) the electronic bands structure. 

The graphene technology was given little attention for decades to think that was a thermodynamically unstable material as it was thought that the fluctuations in temperature would destroy the order of the glass giving rise to the crystal 2D should be merged. Under this perspective it is understood that the revolution meant that Novoselov and Geim incrementally isolate graphene to ambient temperature. The word graphene was officially adopted in 1994, after having been designated interchangeably, in the field of surface science - "monolayer of graphite". 


In addition, many newly discovered nanostructures, such as carbon nanotubes, are related to the graphene. Traditionally, these nanotubes have been described as "sheets of graphene rolled on themselves" .In fact the properties of carbon nanotubes are explained and understood easily from the inherent in the graphene. It has been also described the preparation of nanotiras of graphene by nanolithography, making use of a scanning tunnelling microscope.

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Graphene proterty

DO YOU KNOW ANY GRAPHENE PROPERTY?

One graphene property is that it is a perfect thermal conductor. Its thermal conductivity was recently measured at room temperature and is much higher than the value observed in all the structures of carbon nanotubes of carbon, graphite and diamond.

The ballistics of the thermal conductance graphene is isotropic, that is to say, equally in all directions. In a similar manner to the other physical properties of this material, its two-dimensional structures are particularly special.

The study of the thermal conductivity of this graphene property can have important implications in electronic devices based on graphene. As devices continue to shrink and increases the density of the circuit, high thermal conductivity, which is essential for the dissipation of heat efficient to keep fresh electronics, plays an increasing role in the reliability of the device.

Second graphene property is one of the thinnest material ever made, is still visible to the eye. Due to its unique electronic properties, absorbs a 2.3 % of the light that passes through it, which make it visible enough.

A third graphene property is that the graphene is similar to the surface of graphite, graphene can adsorb and desorb different atoms and molecules. Weakly attached adsorbates often act as donors or acceptors and lead to changes in the carrier concentration, so graphene remains highly conductive.

A fourth graphene property is that is flexible but hard at the same time. graphene is harder than diamond and steel. Although the graphene is so strong, it is also very elastic. The graphene can stretch up to 20% of its original length. It is expected that this graphene property you will find applications in a new generation of strong and flexible screens for mobiles.

Fifth graphene property is graphene is a great conductor. One of the hottest areas of graphene research focuses on the intrinsic electronic properties; how electrons flow through a sheet – only one atom thick – while under the influence of various external forces.

Why is this graphene property so interesting?

In the first place, the graphene is great conductor; electrons are able to flow easily through graphene than through the copper. The electrons travel through the graphene sheet, as fast as just one hundredth that of the speed of light.

Secondly, the electrons in graphene behave manner makes it very useful to explore some fundamental physical properties. Graphene’s near perfect crystal lattice mean it is a very clean system in which to experiment. By restricting the electrons to only two dimensions. 

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