Skip to main content

The Economist explains : The fuss about graphene













Jun 9th 2015, 23:50 BY A.A.K.

















BY WEIGHT, it is 100 times stronger than steel, yet it can stretch by as much as a quarter of its length. 


Graphene is the thinnest solid ever known, indeed the thinnest possible: it is a sheet of linked carbon atoms just one atom thick. 




It is a great conductor of electricity and nearly transparent to visible light, but is impermeable to gases and liquids. It has so many surprising properties that it has been dubbed a "wonder material" and has earned its discoverers a Nobel prize. 



Graphene-related patents have shot up from 3,018 in 2011 to 8,416 in 2014, the year the European Union launched a ten-year, billion-euro project to unravel the wonder material's mysteries. 




Why does graphene stir such interest?





The fuss began in 2003 when Andre Geim and his student Konstantin Novoselov, physicists at the Manchester University, first peeled layers of the stuff from graphite using sticky tape. 



Atom-thick sheets were thought so unlikely to be stable that the pair's report was rejected, twice, by the journal Nature. 



Once the Manchester pair was proved right, a flurry of studies began to measure the properties of the stuff. 



Graphene was found to be incredibly strong, and electric current zipped across it with virtually no loss, up to 200-times faster than in silicon—not far off the speed of light. 




The material's strength was soon touted in graphene-enhanced sports kit such as tennis racquets and skis. 



Graphene is not good at controlling or switching electric current, so making faster computers with it remains tricky. 



But applications such as touchscreens exploit its conductive nature. The material has found its way into better, lighter batteries and, in a few months' time, the first graphene light bulb will go on sale.













Plenty of research is going into joining other atoms to the graphene lattice, to make it do what electrical engineers would like. 




The material could help with water purification and desalination efforts; thin graphene sheets with holes just large enough for water molecules could sequester pollutants, while thin tubes lined with it could draw up water and leave salt behind.



Its pliable nature makes it suitable for wearable electronics with flexible displays—or even transparent ones. 


Pairs of electrons moving through graphene can be made to split up, making for "entangled states" that physicists would like to put to use in so-called quantum computers. 




There are biological applications, too; a team at the Michigan Technological University is experimenting with a graphene-bound polymer that regenerates nerve cells in patients with spinal-cord injuries. 



Even birth control could be improved by graphene's strength and impermeability to liquids; in 2013, the Gates Foundation put $100,000 into an effort to develop a graphene-enhanced condom.




Ideas for using graphene are proliferating almost at the speed at which electrons move within it. 



Detractors insist that interest in the material is a bubble bound to burst, and that claiming graphene as an ingredient in a product is more about marketing than innovation. 



But naysayers would do well to remember the history of silicon, which was purified a full century before it found much use; now it is the centrepiece of the global electronics industry.




 An understanding of what graphene is capable of, and how to make lots of it, has bloomed in far less time. 




If even a fraction of the applications envisaged for it take off, graphene will have earned its nickname as a wonder material. 




Dig deeper:









http://www.economist.com/blogs/economist-explains/2015/06/economist-explains-7?fsrc=scn/fb/wl/ee/st/thefussaboutgrapheneEE

Popular posts from this blog

THE MOST SOUGHT AFTER MANGOES IN THE WORLD ....

While "Flavor" is very subjective, and each country that grows mangoes is very nationalistic, these are the mango varieties that are the most sought after around the world because of sweetnesss (Brix) and demand.

The Chaunsa has a Brix rating in the 22 degree level which is unheard of!
Carabao claims to be the sweetest mango in the world and was able to register this in the Guiness book of world records.
Perhaps it is time for a GLOBAL taste test ???





In alphabetical order by Country....










India




Alphonso





Alphonso (mango)
From Wikipedia, the free encyclopedia








Alphonso (हापुस Haapoos in Marathi, હાફુસ in Gujarati, ಆಪೂಸ್ Aapoos in Kannada) is a mango cultivar that is considered by many[who?] to be one of the best in terms of sweetness, richness and flavor. 


It has considerable shelf life of a week after it is ripe making it exportable. 

It is also one of the most expensive kinds of mango and is grown mainly in Kokan region of western India.

 It is in season April through May and the fruit wei…

Mangoes date back 65 million years according to research ...

Experts at the Birbal Sahni Institute of Palaeobotany (BSIP) here have traced the origin of mango to the hills of Meghalaya, India from a 65 million year-old fossil of a mango leaf. 





The earlier fossil records of mango (Mangifera indica) from the Northeast and elsewhere were 25 to 30 million years old. The 'carbonized leaf fossil' from Damalgiri area of Meghalaya hills, believed to be a mango tree from the peninsular India, was found by Dr R. C. Mehrotra, senior scientist, BSIP and his colleagues. 




After careful analysis of the fossil of the mango leaf and leaves of modern plants, the BISP scientist found many of the fossil leaf characters to be similar to mangifera.


An extensive study of the anatomy and morphology of several modern-day species of the genus mangifera with the fossil samples had reinforced the concept that its centre of origin is Northeast India, from where it spread into neighbouring areas, says Dr. Mehrotra. 




The genus is believed to have disseminated into neighb…

DHL (INDIA) makes gifting mangoes as easy as 1-2-3-....

Gifting mangoes is now easy with DHL
Announcement / Corporate


 May 19, 2011, 14:04 IST





Come this summer pamper your loved ones abroad with a box of delicious mangoes through DHL’s Express Easy Mango service, a unique one-stop-shop and hassle-free service for gifting mangoes all across the world.






This unique service by DHL Express, the world’s leading express company, allows customers to send mangoes from India across the world to the following countries Belgium, Canada, Czech Republic, Germany, Greece, Hungary, Hong Kong, Italy, Luxemburg, Maldives, Netherlands, Norway, Oman, Qatar Singapore, Switzerland and Sweden.





Mangoes can be availed of free of cost by merely paying for the Air Express service. In addition, DHL Express assists customers with the necessary paperwork along with procurement of quality-grade Alphonso mangoes.





Commenting on the new service, Mr. R.S Subramanian, Country Head, DHL Express India said: “With the advent of the mango season, it is no wonder that DHL Express Ea…