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Pyrite nanoparticles from deep-sea hydrothermal vents rich source of iron

Similar to humans, the bacteria and tiny plants living in the ocean need iron for energy and growth. But their situation is quite different than ours - for one, they can't exactly turn to natural iron sources like leafy greens or red meat for a pick-me-up. So where does their iron come from? New research points to a source on the seafloor: nanoparticles of pyrite, or fool's gold, from hydrothermal vents at the bottom of the ocean.

Posted: May 10th, 2011

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CEA-Leti and 5 partners collaborating on self-powered cardiac pacemaker

Leti and five partners are developing a self-powered cardiac pacemaker eight times smaller than current models. This energy self-sufficient device will harvest mechanical energy from the movements of the heart, potentially eliminating the need for battery replacement through post-op surgery and lowering healthcare costs.

Posted: May 10th, 2011

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Nanostrukturen schalten schneller

Rund 100 Nanometer lange Polymerketten koennen als winzige Schalter fuer kuenftige technische Anwendungen dienen. Bisher galt die Reaktionszeit der Nanostrukturen jedoch als zu langsam - eine Gruppe von Forschern der Uni Duisburg-Essen hat nun das Gegenteil bewiesen.

Posted: May 10th, 2011

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Optical control of magnetic effects at the nanoscale

Physicists have succeeded in developing a procedure to merge magneto-optics and plasmonics. The effects which were realized for the first time are already that promising, that their application in electronic components should be possible in the next future.

Posted: May 10th, 2011

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Electromechanics also operates at the nanoscale

What limits the behaviour of a carbon nanotube? This is a question that many scientists are trying to answer. Physicists at University of Gothenburg, Sweden, have now shown that electromechanical principles are valid also at the nanometre scale. In this way, the unique properties of carbon nanotubes can be combined with classical physics - and this may prove useful in the quantum computers of the future.

Posted: May 9th, 2011

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Hydrogen opens the road to graphene... and graphane

An international research team has discovered a new method to produce belts of graphene called nanoribbons. By using hydrogen, they have managed to unzip single-walled carbon nanotubes. The method also opens the road for producing nanoribbons of graphane, a modified and promising version of graphene.

Posted: May 9th, 2011

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Low-cost, efficient catalyst boosts hydrogen fuel technology

Scientists from CINF, CASE, Stanford University and SLAC National Accelerator Laboratory have engineered a cheap, abundant alternative to the expensive platinum catalyst and coupled it with a light-absorbing electrode to make hydrogen fuel from sunlight and water.

Posted: May 9th, 2011

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