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Thursday, 8 June 2017

Solution to Cracked Cellphones Screens


Almost every smartphone user can say one or more about the sickening feeling of watching your
phone fall to the ground and seeing the mobile screen splinter like a spiderweb into dozens of tiny pieces. The iPhone's screen major design flaws are made primarily out of silicone, a material that is easily broken and expensive.
But researchers think they may have developed a material that would end cracked screens for good.

Claudia Ojeda-Aristizabal from California State University, Long Beach, who participated in the research, said the material is made by layering hexagonal boron nitride (h-BN), graphene, and C60, which is also known as Buckminsterfullerene, or "bucky-ball," because of its resemblance to the geodesic dome structures of architect Buckminster Fuller.

 

Not only is the new material crack-resistant — it's energy-efficient and a fast conductor of electricity. And, because of the C60, which is commonly used in solar cells, the material could mean your mobile screen might one day recharge itself phone's (battery).
Here's how the material is constructed. Graphene, a 2D form of carbon, is far stronger than steel, while remaining ultra-lightweight. It's also highly conductive. The hBN helps electrons move between the graphene and the C60, another super-conductive material.
When layered one on top of the other, the properties of these three transparent materials compliment each other. The conductive properties of C60 and graphene, helped along by the hBN, mean that the electricity in the screen will move ultra-quickly. That, combined with the durability of graphene and the solar charging abilities of C60, make it an ideal candidate for a phone screen.
The material has some similar properties to silicone, Elton Santos of Queen's University's School of Mathematics and Physics said in a press statement, "but it has improved chemical stability, lightness, and flexibility."

The research was a collaboration between scientists at Queen's University Belfast, Sanford University, the University of California, Berkeley, California State University, and the National Institute for Materials Science in Japan. The results of their work were published in the journal ACS Nano.
Ojeda-Aristizabal said the new material could lead to lots of applications besides smartphone screens. Perhaps we'll soon see solar-powered windshields or crack-proof windows for homes and offices. 
That's not to say the miracle material doesn't have its drawbacks. For one, graphene lacks a "bandgap," meaning that its conductivity and electrical signal can't be turned on and off.
But once that problem is solved, bemoaning cracked cellphone screens may be a thing of the past.  
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