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Researchers get first detailed look at nitrogen doping in single-layer graphene

Researchers used a combination of four techniques to make the first detailed images of nitrogen-doped graphene film. They showed that individual nitrogen atoms had taken the places of carbon atoms in the two-dimensional sheet; that about half of the extra electron contributed by each nitrogen atom was distributed throughout the graphene lattice; and that this changed the electronic structure of the graphene sheet only within a short distance - about the width of two carbon atoms - from the dopant atoms.

Posted: Sep 21st, 2011

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A*STAR SIMTech launches comprehensive microfluidics foundry for the worldwide microfluidic community

The Singapore Institute of Manufacturing Technology (SIMTech), a research institute of the Agency for Science, Technology and Research (A*STAR), launched the SIMTech Microfluidics Foundry (SMF) today. SMF offers an integrated spectrum of capabilities for developing and manufacturing of specialised and low-cost microfluidic devices for applications in healthcare, biomedical, pharmaceutical, energy, water quality monitoring and chemical processing.

Posted: Sep 21st, 2011

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Assembly of nanostructures using DNA may lead to the production of new materials

Assembly of nanostructures using DNA may lead to the production of new materials with a wide range of applications from electronics to tissue engineering. Researchers in the Institute for Nanoscience and Engineering at the University of Arkansas have produced building blocks for such material by controlling the number, placement and orientation of DNA linkers on the surface of colloidal nanoparticles.

Posted: Sep 20th, 2011

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Proton-based transistor could let machines communicate with living things

Human devices, from light bulbs to iPods, send information using electrons. Human bodies and all other living things, on the other hand, send signals and perform work using ions or protons. Materials scientists at the University of Washington have built a novel transistor that uses protons, creating a key piece for devices that can communicate directly with living things.

Posted: Sep 20th, 2011

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Ferromagnetism can be induced electrically at room temperature

Inducing and controlling magnetization in ferromagnetic semiconductors using electric rather than magnetic fields could lead to smaller and more energy-efficient spintronic devices. Until now, however, this electrical control has only been achieved at cryogenic temperatures in magnetic semiconductors. Scientists in Japan have now extended electrical control all the way up to ambient temperature in cobalt-doped titanium dioxide, paving the way for room-temperature spintronics.

Posted: Sep 20th, 2011

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