Posts Tagged ‘electrons’
Science & Technology - Jan 19, 2010 13:11 - 2 Comments
Superconductivity in iron compound
CORNELL—A surprising discovery of electronic liquid crystal states in an iron-based, high-temperature superconductor is another step toward understanding superconductivity and using it in such applications as power transmission. (more…)
Science & Technology - Dec 23, 2009 16:46 - 0 Comments
3-D channels pave way for man-made organs
TEXAS A&M (US)—The creation of a network of microchannels could advance the field of tissue engineering by serving as a three-dimensional vasculature to support construction of tissue, include organs. (more…)
Science & Technology - Dec 17, 2009 13:23 - 0 Comments
Scientists film photons with electrons
CALTECH (US)—Recently invented techniques—that allow the real-time, real-space visualization of fleeting changes in the structure of nanoscale matter—have been used to image the evanescent electrical fields produced by the interaction of electrons and photons, and to track changes in atomic-scale structures. (more…)
Science & Technology - Nov 18, 2009 12:55 - 2 Comments
Marveling over ‘molecular chicken wire’
VANDERBILT (US)—The hottest, thinnest, toughest new material in physics and nanotechnology is graphene: a remarkably flat molecule made of carbon atoms arranged in hexagonal rings much like molecular chicken wire. (more…)
Science & Technology - Nov 16, 2009 17:14 - 0 Comments
Tiny light beam budges nanoscale object
CORNELL (US)—With a bit of leverage, researchers have used a very tiny beam of light with as little as 1 milliwatt of power to move a silicon structure up to 12 nanometers. That’s enough to completely switch the optical properties of the structure from opaque to transparent, they report. (more…)
Science & Technology - Oct 6, 2009 17:00 - 2 Comments
‘Mad-cow’ proteins differ unexpectedly
VANDERBILT (US)—The first direct information about the molecular structure of prions, the infectious proteins responsible for “mad cow” disease, reveals surprisingly large structural differences between natural prions and the closest synthetic analogs created in the lab. (more…)
Science & Technology - Aug 31, 2009 11:06 - 0 Comments
Dancing with high-temp superconductors
A computer-generated representation of the data obtained by scanning a cuprate superconductor in sub-atomic steps. Each cross represents a “Cooper pair” of electrons. At a temperature below 37K (bottom sheet) the pairs are in an orderly arrangement and current can flow without resistance. At a higher temperature the Cooper pairs are still present, but no longer orderly. (Credit: Jhinhwan Lee/Davis Group/Cornell University)
Earth & Environment - Aug 28, 2009 10:25 - 0 Comments
Clues to feather’s technicolor past
Researchers have discovered evidence that prehistoric feather fossils from in Germany were once vividly iridescent. The finding could help scientists reconstruct the colorful features of other fossils. “Of course, the ‘Holy Grail’ in this program is reconstructing the colors of the feathered dinosaurs,” says lead author Jakob Vinther. (Credit: Jakob Vinther/Yale University)
Science & Technology - Aug 21, 2009 11:19 - 0 Comments
‘Supercool’ atoms try to act like electrons
These three false-color images, from left, depict the density of cesium atoms in a superfluid (conducting) state, in a transition state and finally in an insulating state. The original sample consisted of a single-layer of cesium atoms that formed a sheet measuring 80 microns in diameter, barely visible to the naked eye. Green indicates the lowest density of atoms. Red indicates a high, constant density. Physicists call this a plateau, which a team of scientists have observed for the first time. (Courtesy: Nathan Gemelke and Cheng Chin/University of Chicago)
Health & Medicine - Jun 17, 2009 11:11 - 0 Comments
Crab shell ‘fabric’ patches damaged nerves
A nerve cell growing on a mesh crafted from a material found in crab shells.
Science & Technology - Mar 11, 2009 13:12 - 0 Comments
Quantum ‘dance’ could revolutionize computing
PRINCETON (US)—For years scientists have suspected that atoms placed in certain configurations would trigger electrons to perform a quantum dance of sorts. Now an international team of scientists has observed swarms of electrons spinning in a synchronized quantum dance within a new material. They are hopeful the discovery could be harnessed to transform computing and electronics. (more…)
Science & Technology - Mar 6, 2009 18:39 - 2 Comments
Fine print so small it’s subatomic
STANFORD (US)—How tiny is the world’s smallest writing? The letters in the words written by Standford University researchers are assembled from subatomic-sized bits as small as 0.3 nanometers—or roughly one third of a billionth of a meter.
Science & Technology - Mar 5, 2009 12:45 - 0 Comments
Energy-efficient way to build a better laser
PRINCETON (US)—Scientists have discovered a more efficient way to produce a high-performing laser. The finding could lead to lasers that operate at higher temperatures than existing devices, making them ideally suited for applications in air quality monitoring, medical diagnostics, and even homeland security.
