Near-perfect performance in low-cost semiconductors

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Researchers redefine what it means for low-cost semiconductors, called quantum dots, to be near-perfect and find that quantum dots meet quality standards set by more expensive alternatives.

Tiny, easy-to-produce particles, called quantum dots, may soon take the place of more expensive single crystal semiconductors in advanced electronics found in solar panels, camera sensors and medical imaging tools. Although quantum dots have begun to break into the consumer market — in the form of quantum dot TVs — they have been hampered by long-standing uncertainties about their quality. Now, a new measurement technique developed by researchers at Stanford University may finally dissolve those doubts.

“Traditional semiconductors are single crystals, grown in vacuum under special conditions. These we can make in large numbers, in flask, in a lab and we’ve shown they are as good as the best single crystals,” said David Hanifi, graduate student in chemistry at Stanford and co-lead author of the paper written about this work, published March 15 in Science.

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Spray-On Solar

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Toronto’s Illan Kramer, Inventor of Spray-on Solar

Illan Kramer, a post-doctoral fellow at the University of Toronto, and IBM Canada’s Research and Development Center has invented a new way to spray solar cells onto flexible surfaces using minuscule light-sensitive materials known as colloidal quantum dots (CQDs)—a major step toward making spray-on solar cells easy and cheap to manufacture. 

“My dream is that one day you’ll have two technicians with Ghostbusters backpacks come to your house and spray your roof,” says Kramer.

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QD TV that can be rolled up and carried in a pocket coming soon

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Forget about 3D.

Coming soon: the QD TV.  British scientists say they have developed a technology which they claim could be used to produce TV that can be rolled up and carried in a pocket. The scientists  at Manchester University have actually developed a new form of light-emitting crystals, known as quantum dots, (QD) which can be used to produce ultra-thin televisions.

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Vision Could Be Improved By Injecting Semiconductor Specks Into Retinas

Vision Could Be Improved By Injecting Semiconductor Specks Into Retinas 

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The idea of creating a bionic eye to assist people with seriously impaired vision is definitely exciting. But installing a silicon chip into a human eyeball to assist the retinas has some drawbacks, the least of which being that the chip itself can block light from falling on areas of the retina that are healthy and still working properly. So Jeffrey Olsen at the University of Colorado Hospital has come up with a different approach.

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Nanomaterials Movement Measured in Simple Model Food Chain

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New research* shows that while engineered nanomaterials can be transferred up the lowest levels of the food chain from single celled organisms to higher multicelled ones, the amount transferred was relatively low and there was no evidence of the nanomaterials concentrating in the higher level organisms.  

 

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