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MessagePosté le: Jeu 28 Juin - 02:47 (2018)    Sujet du message: Gary Cahill England Shirt Répondre en citant

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CANBERRA, July 21 (Xinhua) -- Australian scientists have successfully used household sticky tape to help build ultra-thin and lightweight solar cells that could improve the way solar energy is collected.

Solar cells are used to collect energy from the sun to convert into electrical power for portable devices such as lights, radios and computers.

Scientists at the Australian National University (ANU) in Canberra used sticky tape to create single-atom thick layers, termed phosphorene Camiseta Mauro Icardi Mundial 2018 , in the construction of the cells. This was done in the same simple way as the Nobel Prize winning discovery of graphene.

Unlike graphene, phosphorene works as a semiconductor but is thinner and lighter than silicon which is the basis of current electronics technology.

"Because phosphorene is so thin and light, it creates possibilities for making lots of interesting devices, such as LEDs or solar cells," said lead researcher Dr Yuerui (Larry) Lu, from ANU.

"It shows very promising light emission properties."

Lu said the household tape was used to peel thinner and thinner layers of crystals from the black crystalline form of phosphorus.

As well as creating much thinner and lighter semiconductors than silicon Camiseta Emiliano Insua Mundial 2018 , phosphorene has light emission properties that vary widely with the thickness of the layers, which enables much more flexibility for manufacturing.

"This property has never been reported before in any other material," said Dr Lu, from ANU's College of Engineering and Computer Science, whose study is published in the Nature serial journal Light: Science and Applications.

"By changing the number of layers we can tightly control the band gap, which determines the material's properties Camiseta Lucas Biglia Mundial 2018 , such as the color of LED it would make.

"You can see quite clearly under the microscope the different colors of the sample, which tells you how many layers are there," said Lu.

The behavior of phosphorene in thin layers was superior to silicon, Lu said. "Phosphorene's surface states are minimized, unlike silicon, whose surface states are serious and prevent it being used in such a thin state."
Photo: CFP
A crowdfunding campaign Camiseta Leandro Paredes Mundial 2018 , which was taken down after 16 hours, has divided China. The money was being raised to help two unmarried people pay a fine imposed on them for having an illegitimate child. Some have said that the parents did not act responsibly, but others have argued that the family planning policy is not considerate enough and takes away people's rights.

It has been almost 20 days since Shen Bolun and Wu Xia's baby was born. She doesn't have a name yet, nor a household registration (hukou). And she won't be getting one of these important documents any time soon, because her parents are not married.

Pregnancies outside marriage are not uncommon in China. But it's relatively rare that anyone decides to actually have a baby outside of wedlock, because the baby can't get a hukou. Cedric Portugal Jersey   Eliaquim Mangala France Jersey   Harry Kane England Jersey   Danijel Subasic Croatia Jersey   Daniel Torres Colombia Jersey   Lucas Moura Brazil Jersey   Kevin De Bruyne Belgium Jersey   Facundo Roncaglia Argentina Jersey   Diego Godin Uruguay Jersey   Stephan Lichtsteiner Switzerland Jersey 


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