29/04/2014 Newsround


29/04/2014

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Hi, I'm Ricky and this is Newsround. First, the Olympics is the biggest

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sporting event in the world with the next games set to be held in the

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Brazilian city of Rio in 2016. But there's real worries the city won't

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be ready in time, with loads of the buildings a long way off being

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finished. A top Olympic boss has now said that Rio's preparations are the

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worst he's ever experienced, and called the situation critical.

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Next, it's thinner than paper, stronger than metal and could one

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day be used to make bendy smart phones. Graphene has fascinated

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scientists for years, but now they've found a new way to make it -

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in a kitchen blender! You're not going to want to miss this. Take it

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away, Martin! Harder than diamonds, 100 times stronger than steel. And

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the thinnest material ever discovered. All these things make

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graphene, a very useful material. Graphene was first made ten year ago

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here at the University of Manchester when scientists realise their sticky

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tape was pulling graphene crystals off a lump of graphite. As well as

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being strong, tough and thin it is see through, bendy and conducts

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electricity. In the future, it could be used to

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make plane, bendy smartphones, even electronic paper. But graphene

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crystals are so small, you need a lot of them to make things so the

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search is on to find the best way to make them.

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Now, a group of scientists in Ireland have found they can extract

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thin layer of crystals but putting it in a kitchen blender It allows us

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to make a large amount of graphene in a way that is cheaper than other

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ways we have had before. The graphene you make with the blender

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is very good for things like printable ink, you can make an ink

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you can put in a printer and make headquarterically conducting

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circuits op paper, there are other application, electronic, like

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computer chips you can't use it for. We won't be using graphene planes

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for a while but smartphones with graphene screens are in development.

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Not bad for something discovered almost by accident.

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Now if you don't like flying, look away now. This is Lukla Airport,

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near to Mount Everest. Some call it the world's scariest, because pilots

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have to time their take-offs to perfection so that they don't drop

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off the end of the runway and down the sharp cliff.

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And finally, the glow in the dark road markings being trialled in the

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Netherlands are getting removed. It's because drivers began switching

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their car lights off to experience the glow, causing dangerous

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conditions on the road. That's all from me, Newsround's back tomorrow.

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