What's Graphene?

GRAPHENE – THE NEW WONDER MATERIAL Moving from Silicon Age to Graphene Age

Discovered in  2014 by NOBEL PRIZE WINNERS Andre Geim and Konstantin Novoselov from the University of Manchester, Graphene  is called the Miracle Material of Future Technologies

  • The world’s lightest, thinnest and toughest nanomaterial
  • 200 Time stronger then Steel and 6 time lighter
  • Harder then Diamond
  • 3% Transparent
  • Flexible (can stretched 20% of it length)
  • Can absorb 900 times it own weight
  • Best thermal conductor ever discovered
  • Best Electrical Conductivity of any material
  • When heated, the Graphene heating film can emit far-infrared radiation at a wave length of 6-14 μm, which is similar to that emitted from the human body, Thus the two radiation would have a resonance together to bring about a physical therapeutic effects like increasing the micro-circulation, increasing the blood circulation, boosting metabolism, improving immunity.

More about Graphene

  • The amazing properties of graphene lend themselves to some very interesting potential applications.
  • Density
  • Graphene is an incredibly lightweight material. When processed into an aerogel it has a density of just 0.16mg/cm3.  This material has been shown sitting on a blade of grass!  In addition to being incredibly lightweight graphene aerogel is able to absorb 900 times its own weight in liquid very quickly, making it useful for pollution control and mopping up oil spills.

–          Mechanical behaviour

  • Graphene is an incredibly strong and stiff material. A sheet of graphene would be over 100 times stronger than a steel film of the same thickness and it has a stiffness of around 1TPa.  Graphene is also relatively elastic for a crystal, stretching by up to 20% of its length.
  • These mechanical properties open up a wealth of opportunities for making structural materials for the construction industry. Since graphene is also extremely lightweight these new composites could be used to make large bridges and buildings.
  • It has been said that a hammock made with one square metre of graphene would be able to support the weight of a four kilogram cat, yet it would weigh less than one of the cat’s whiskers and be virtually invisible! At just 0.77mg the graphene sheet is only about 0.001% of the weight of a square metre of paper.

–          Electrical / electronic behaviour

  • Graphene has been shown to have the highest current density at room temperature (a million times that of copper); it has the best electrical conductivity of any material. This means it could be used to transport electricity more efficiently.
  • Graphene has also been shown to be a ballistic conductor. This occurs when the mean free path (the distance an electron can move through the structure without crashing into anything) is longer than the dimensions of the material.  Since electrical resistance arises from electrons scattering or crashing into things, virtually resistance free electronic components could be made from graphene.

Optical behaviour

Graphene absorbs just 2.3% of the light shining on it which means it is almost transparent.  However, you can see it!  A sheet just one atom thick that can be seen with the naked eye!  The transparency of graphite, combined with its electrical properties makes it an interesting proposition for touch screens.  These are traditionally made from indium tin oxide which is far less elastic than graphene.

Thermal behaviour

Graphene is the best thermal conductor of any material that we know about.

 

Permeability

Graphene sheets are the most impermeable material.  Even helium atoms, which can get though pretty much anything, are unable to permeate through graphene

Research has suggested that graphene could be used as a filter in desalination plants.  Water molecules are able to move through a graphene membrane but salt and other pollutants are not.

The future

Graphene is without a doubt the wonder material of our generation.  It is the best material in so many different areas and is made from one of most common elements on our planet.  If ways of producing and processing this wonder material on an industrial scale can be developed and exploited it is sure to change our technology in the future.

 

Graphene and Health Benefits

 

  • Graphene emitting far-infrared wavelength is close to human’s far- infrared wavelength, come with physiotherapy effect,such as remove freckle and wrinkles around eyesFar infrared (FIR) is part of the spectrum of light emanating from the sun. FIR is not visible to the eye, but you feel it as heat (not hot like infrared radiation) penetrating into skin.

 

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