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    Category Physics

    3D-printed Magnets: How can you produce a Magnet with exactly the right magnetic field?

    October 26, 2016, Categories  Physics, Technology/Electronics

    A magentic cup-like shape, created in the 3D-printer. Credit: Image courtesy of Vienna University of Technology

    A magentic cup-like shape, created in the 3D-printer. Credit: Image courtesy of Vienna University of Technology

    For the 1st time, magnets can be made with a 3D printer. It is difficult to produce a permanent magnet with a magnetic field of a specific pre-determined shape. That is, until now, thanks to TU Wien: for the first time ever, permanent magnets can be produced using a 3D printer. This allows magnets to be produced in complex forms and precisely customised magnetic fields, required, for example, in magnetic sensors.

    “The strength of a magnetic field is not the only factor,” says Dieter Süss, Head of Christian-Doppler Advanced Magnetic Sensing and Materials lab, TU Wien...

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    Turning your Living room into a Wireless Charging Station

    October 25, 2016, Categories  Physics, Technology/Electronics

    Turning your living room into a wireless charging station

    This graphic illustrates how a flat-screen Fresnel zone wireless power transfer system could charge smart devices in your living room. Credit: Duke University

    A flat-screen panel that resembles a TV on your living room wall could one day remotely charge any device within its line of sight. Engineers at the University of Washington, Duke University and Intellectual Ventures’ Invention Science Fund (ISF) show that the technology already exists to build such a system—it’s only a matter of taking the time to design it. “There is an enormous demand for alternatives to today’s clunky charging pads and cumbersome cables, which restrict the mobility of a smart phone or a tablet...

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    The Quantum Sniffer Dog

    October 24, 2016, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    compact sensor providing room-temperature operation of monolithic surface-active lasers and detectors integrated on the same chip. The differentiation between emitter and detector is eliminated, which enables mutual commutation. Proof-of-principle gas measurements with a limit of detection below 400 ppm are demonstrated. This concept enables a crucial miniaturization of sensing devices.

    Compact sensor providing room-temperature operation of monolithic surface-active lasers and detectors integrated on the same chip. The differentiation between emitter and detector is eliminated, which enables mutual commutation. Proof-of-principle gas measurements with a limit of detection below 400 ppm are demonstrated. This concept enables a crucial miniaturization of sensing devices.

    In technological gas detection there are a whole host of methods available including infrared lasers, passing a laser beam through the gas to an adjacent separate detector, which measures the degree of light attenuation it causes...

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    Non-Metal Catalyst Splits Hydrogen molecule

    October 24, 2016, Categories  Physics, Technology/Electronics

    Chemists at Goethe University have now developed a new catalyst for the activation of hydrogen by introducing boron atoms into a common organic molecule. Credit: GU

    Chemists at Goethe University have now developed a new catalyst for the activation of hydrogen by introducing boron atoms into a common organic molecule. Credit: GU

    Boron compounds extend range of possible chemical synthesis applications. Hydrogen (H2) is a valuable raw material which as a result of sophisticated catalysts is becoming more important. Applications range from food and fertilizer manufacture to crude oil cracking to an energy source in fuel cells. A challenge lies in splitting the strong H-H bond under mild conditions. Chemists at Goethe University have developed a new catalyst for activation of H2 by introducing boron atoms into a common organic molecule. The process requires only an electron source in addition and should therefore be usable on a broad scale in future.

    The h...

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