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E.g., 09/04/2015
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  • News

    Nanogenerators harvest body’s energy to power devices

    Ask not what your gadgets can do for you; ask what you can do for your gadgets.

    In the race to create bionic humans, researchers are nanometers away from turning people into device chargers. Instruments called nanogenerators can harvest energy from swinging limbs, jiggling skin and ballooning lungs. And that energy can power wearable and implantable gizmos, such as pacemakers, muscle...

    09/01/2015 - 16:29 Materials, Biomedicine, Physics
  • News in Brief

    Buckyballs turn on copper’s magnetism

    A new recipe for magnetism calls for an infusion of nano-sized soccer balls.

    When exposed to sheets of carbon-atom cages called buckyballs, copper and manganese become permanent magnets, researchers report in the Aug. 6 Nature. The technique could enable engineers to expand the roster of metals for magnet-based technology,...

    08/05/2015 - 13:00 Materials, Condensed Matter
  • News in Brief

    Stretchy fiber lets electrons flow

    A carbon-wrapped rubber rope keeps electrical current flowing even when stretched, twisted and bent. The flexible fiber, reported in the July 24 Science, could inspire flexible electronic displays, better pacemaker leads and stretchable power cords.

    Elasticity and current-carrying...

    07/23/2015 - 17:18 Materials
  • Science Ticker

    Stretchy fiber keeps electrons flowing

    A carbon-wrapped rubber rope keeps electrical current flowing even when stretched, twisted and bent. The flexible fiber, reported in the July 24 Science, could inspire flexible electronic displays, improved pacemaker leads and stretchable power cords.

    Elasticity and current-carrying prowess don’t usually go together:...

    07/23/2015 - 17:04 Materials
  • Letters to the Editor

    Neandertal bling and more reader feedback

    Strung out

    Neandertals knew how to accessorize. Eight 130,000-year-old eagle talons unearthed in Croatia show signs of being strung together and worn as a necklace or bracelet, as Bruce Bower reported in “Cache of eagle claws...

    06/03/2015 - 10:50 Anthropology, Materials, Animals, Astronomy
  • News

    Like a balloon, peculiar magnet grows and shrinks

    An unusual magnet expands and contracts when exposed to a magnetic field. While scientists have long known that fields can subtly change magnets’ shape, the alloy described in the May 21 Nature is a rare specimen that experiences significant changes in volume. This material or similar ones could be used to produce actuators that push...

    05/20/2015 - 15:32 Materials
  • Letters to the Editor

    Suds versus nanoparticles and more reader feedback

    The bipedal Butcher

     In “Fearsome croc dominated northern Pangaea” (SN: 4/18/15, p. 16), Ashley Yeager...

    05/20/2015 - 08:49 Paleontology, Materials
  • News

    Spiders spin stronger threads with nanotubes

    Sorry, Kevlar. Spider silk loaded with carbon nanotubes may be the burliest fiber around.

    When spritzed with the tiny tubes, spiders spin superstrong, supertough strands of silk. These hardy threads are the toughest fibers ever created, researchers report online April 25 at arXiv.org.

    Such fibers could one day replace the heavy steel...

    05/18/2015 - 14:00 Materials
  • News

    Electron pairs can take the heat

    Electrons zipping through a thin layer of strontium titanate interact and form pairs at higher temperatures than expected, researchers report in the May 14 Nature. The study is the first definitive evidence of coupled electrons in a solid material too warm for superconductivity, a state in which paired electrons move...

    05/13/2015 - 13:00 Condensed Matter, Materials
  • News

    A new spin on guiding sound waves along a one-way route

    An array of miniature turntables could offer a powerful new way to control the flow of sound.

    The proposed device, reported in the March 20 Physical Review Letters, would channel sound waves in a protected one-way thoroughfare along its edge. The structure is an acoustic version of a hotly researched class of...

    03/27/2015 - 15:36 Materials, Physics