ScienceDaily: Engineering and Construction News |
- New devices based on metamaterials
- New feather findings get scientists in a flap
- Special microscope captures defects in nanotubes
- Scientists disprove theory that reconstructed boron surface is metallic
| New devices based on metamaterials Posted: 22 Oct 2014 07:33 AM PDT Researchers have designed and manufactured new devices based on metamaterials (artificial materials with properties not found in nature). They achieved the first experimental demonstration ever with epsilon-near-zero metamaterials. "These materials have surprising characteristics, such as the fact that a wave traveling within them can do so at almost infinite speed and, thus, can be transmitted from one place to another without hardly any loss of energy, no matter how unusual or complicated the shape of the material," according to a researcher. |
| New feather findings get scientists in a flap Posted: 21 Oct 2014 06:06 PM PDT Scientists have revealed that feather shafts are made of a multi-layered fibrous composite material, much like carbon fiber, which allows the feather to bend and twist to cope with the stresses of flight. Since their appearance over 150 million years ago, feather shafts (rachises) have evolved to be some of the lightest, strongest and most fatigue resistant natural structures. |
| Special microscope captures defects in nanotubes Posted: 21 Oct 2014 01:22 PM PDT Chemists have devised a way to see the internal structures of electronic waves trapped in carbon nanotubes by external electrostatic charges. Carbon nanotubes have been touted as exceptional materials with unique properties that allow for extremely efficient charge and energy transport, with the potential to open the way for new, more efficient types of electronic and photovoltaic devices. However, these traps, or defects, in ultra-thin nanotubes can compromise their effectiveness. |
| Scientists disprove theory that reconstructed boron surface is metallic Posted: 21 Oct 2014 11:53 AM PDT Scientific inquiry is a hit and miss proposition, subject to constant checking and rechecking. Recently, a new class of materials was discovered called topological insulators—nonmetallic materials with a metallic surface capable of conducting electrons. The effect, based on relativity theory, exists only in special materials -— those with heavy elements —- and has the potential to revolutionize electronics. |
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