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Graphene Sheets and Their Applications

As we all may accept that nanotechnology is a key technology for 21st century. Nanotechnology provides unique products and applications of innovative techniques in medicine, pharmacy and computer technology.
One of the most important materials related to nanotechnology is obviously graphene. The demand for carbon nanostructures particularly carbon nanotubes and graphene, is increasing rapidly in electrical, mechanical, optical and other unique properties. Nowadays, great efforts have been made toward the preparation of Graphene Sheet  (10 cm x 10 cm).
Carbon has a unique feature of forming a chemically stable two-dimensional one atom thick sheet called as graphene. Graphene is the most thinnest and the strongest material ever to be measured. Also graphene has very high thermal conductivity and stiffness and is impermeable to gases.
Researchers have been looking for possible applications of graphene in high-speed and radio frequency logic devices, thermally and electrically conductive reinforced composites, sensors, transparent electrodes for display and solar cells and biomedicine.
Now let's look at the applications of graphene sheets in biomedicine. Recently graphene has showed promise similar to carbon nanotubes in various biomedical applications such as drug delivery and cancer therapy. Graphene can provide a larger specific surface area than other commonly used carbon nanomaterials and forms strong pi bonds with the drug molecules which can therefore act as a good candidate for drug loading.
Graphene can also be used in EO devices and lasers. Graphene can absorb wavelengths from the visible to the mid-IR with wavelength modulation enabled through electrostatic gating.
The other property of graphene is being carbocatalyst. The use of heterogeneous carbon materials for the transformation or synthesis of organic or inorganic substrates are often termed as carbocatalysts. Recently, the use of metal free catalysts based on carbonaceous materials attracting a great deal of interest. Graphene based materials such as graphene oxide are considered as a new class of carbocatalysts and opened a series of novel application possibilities in chemical synthesis. 
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