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    Category Technology/Electronics

    Alternative to Platinum: Iron-Nitrogen compounds as Catalysts in Graphene

    January 28, 2016, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    Today, most metal and nitrogen doped carbon catalysts for ORR reveal a heterogeneous composition. This can be reasoned by a nonoptimized precursor composition and various steps in the preparation process to get the required active material. The significant presence of inorganic metal species interferes with the assignment of descriptors related to the ORR activity and stability. In this work we present a simple and feasible way to reduce the contribution of inorganic metal species in some cases even down to zero. Such catalysts reveal the desired homogeneous composition of MeN4 (Me = metal) sites in the carbon that is accompanied by a significant enhancement in ORR activity. Among the work of other international groups, our iron-based catalyst comprises the highest density of FeN4 sites ever reported without interference of inorganic metal sites.

    Today, most metal and nitrogen doped carbon catalysts for ORR reveal a heterogeneous composition. This can be reasoned by a nonoptimized precursor composition and various steps in the preparation process to get the required active material. The significant presence of inorganic metal species interferes with the assignment of descriptors related to the ORR activity and stability. In this work we present a simple and feasible way to reduce the contribution of inorganic metal species in some cases even down to zero. Such catalysts reveal the desired homogeneous composition of MeN4 (Me = metal) sites in the carbon that is accompanied by a significant enhancement in ORR activity...

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    New Research Advances Oil Production in Yeast

    January 27, 2016, Categories  Biology/Biotechnology, Environment/Geology, Technology/Electronics, Chemistry/Nanotechnology

    This is a bright-field microscopy of Yarrowia lipolytica. Gene editing in this yeast strain will lead to new precursors for biofuels and specialty polymers Credit: University of California, Riverside

    This is a bright-field microscopy of Yarrowia lipolytica. Gene editing in this yeast strain will lead to new precursors for biofuels and specialty polymers Credit: University of California, Riverside

    CRISPR-Cas9 tool expedites production of biofuel precursors and specialty polymers in living systems. The development will lead to new precursors for biofuels, specialty polymers, adhesives and fragrances. The research involves the oleaginous (oil-producing) yeast Yarrowia lipolytica, which is known for converting sugars to lipids and hydrocarbons that are difficult to make synthetically. Until now, Y. lipolytica has been hard to manipulate at the genetic level, but the application of CRISPR-Cas9 will change that, allowing scientists to tap into its bio-manufacturing potential.

    Unlike traditio...

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    New Record in Nanoelectronics at Ultralow Temperatures

    January 27, 2016, Categories  Physics, Technology/Electronics

    Dr Jon Prance at the Lancaster Quantum Technology Centre. Credit: Image courtesy of Lancaster University

    Dr Jon Prance at the Lancaster Quantum Technology Centre. Credit: Image courtesy of Lancaster University

    The 1st ever measurement of the temp of electrons in a nanoelectronic device a few thousandths of a degree above 0K was demonstrated in a joint research project performed by Lancaster University, VTT Technical Research Centre of Finland Ltd, and Aivon Ltd. The team managed to make the electrons in a circuit on a silicon chip colder than had previously been achieved. Dr Rich Haley said: “This is a notable achievement in that the team has finally broken through the 4 millikelvin barrier, which has been the record in such structures for over 15 years.”

    Although it has long been possible to cool samples of bulk metals even below 1 millikelvin, it has proved very difficult to transfer this t...

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    New Highly Efficient Heavy Metal Ions Filter

    January 26, 2016, Categories  Technology/Electronics, Health/Medical, Chemistry/Nanotechnology, Environment/Geology

    The contaminated water (colored water in vials) is drawn through the hybrid membrane by negative pressure; the heavy metal ions (red spheres) bind to the protein fibers in the process. The filtered water is of drinking quality. Credit: Graphics copyright: Bolisetty & Mezzenga, Nature Nanotechnology, 2016

    The contaminated water (colored water in vials) is drawn through the hybrid membrane by negative pressure; the heavy metal ions (red spheres) bind to the protein fibers in the process. The filtered water is of drinking quality. Credit: Graphics copyright: Bolisetty & Mezzenga, Nature Nanotechnology, 2016

    Water pollution is one of today’s most serious global problems. A new water filtration system has been developed that is superior to existing systems at removing various toxic heavy metal ions and radioactive substances from water and can even be used in gold recovery. Prof. Raffaele Mezzenga’s hybrid filter membrane not only has an extremely simple structure, but uses low-cost raw materials, such as whey protein fibres and activated charcoal...

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