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Scientists measure speedy electrons in silicon

Attosecond laser provides first 'movie' of fast electrons jumping band-gap of semiconductor

22-Dec-2014

The entire semiconductor industry, not to mention Silicon Valley, is built on the propensity of electrons in silicon to get kicked out of their atomic shells and become free. These mobile electrons are routed and switched though transistors, carrying the digital information that characterizes our ...

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The simplest element: Turning hydrogen into 'graphene'

18-Dec-2014

New work from Carnegie's Ivan Naumov and Russell Hemley delves into the chemistry underlying some surprising recent observations about hydrogen, and reveals remarkable parallels between hydrogen and graphene under extreme pressures. Their work is the cover story in the December issue of Accounts ...

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Carbon-trapping 'sponges' can cut greenhouse gases

18-Dec-2014

In the fight against global warming, carbon capture - chemically trapping carbon dioxide before it releases into the atmosphere - is gaining momentum, but standard methods are plagued by toxicity, corrosiveness and inefficiency. Using a bag of chemistry tricks, Cornell materials scientists have ...

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New 'high-entropy' alloy is as light as aluminum, as strong as titanium alloys

12-Dec-2014

Researchers from North Carolina State University and Qatar University have developed a new "high-entropy" metal alloy that has a higher strength-to-weight ratio than any other existing metal material. High-entropy alloys are materials that consist of five or more metals in approximately equal ...

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Defects are perfect in laser-induced graphene

Rice University lab discovers simple way to make material for energy storage, electronics

12-Dec-2014

Researchers at Rice University have created flexible, patterned sheets of multilayer graphene from a cheap polymer by burning it with a computer-controlled laser. The process works in air at room temperature and eliminates the need for hot furnaces and controlled environments, and it makes ...

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Penn researchers show commonalities in how different glassy materials fail

11-Dec-2014

Glass is mysterious. It is a broad class of materials that extends well beyond the everyday window pane, but one thing that these disparate glasses seem to have in common is that they have nothing in common when it comes to their internal structures, especially in contrast with highly ordered and ...

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Unusual electronic state found in new class of unconventional superconductors

Finding gives scientists a new group of materials to explore to unlock secrets of some materials' ability to carry current with no energy loss

10-Dec-2014

A team of scientists from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, Columbia Engineering, Columbia Physics and Kyoto University has discovered an unusual form of electronic order in a new family of unconventional superconductors. The finding, described in Nature ...

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UO-industry collaboration points to improved nanomaterials

University of Oregon microscope puts spotlight on the surface structure of quantum dots for designing new solar devices

02-Dec-2014

A potential path to identify imperfections and improve the quality of nanomaterials for use in next-generation solar cells has emerged from a collaboration of University of Oregon and industry researchers. To increase light-harvesting efficiency of solar cells beyond silicon's limit of about 29 ...

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Shaping the future of energy storage with conductive clay

02-Dec-2014

In the race to find materials of ever increasing thinness, surface area and conductivity to make better performing battery electrodes, a lump of clay might have just taken the lead. Materials scientists from Drexel University's College of Engineering invented the clay, which is both highly ...

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Single-atom gold catalysts may offer path to low-cost production of fuel and chemicals

01-Dec-2014

New catalysts designed and investigated by Tufts University School of Engineering researchers and collaborators from other university and national laboratories have the potential to greatly reduce processing costs in future fuels, such as hydrogen. The catalysts are composed of a unique structure ...

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