How Does Superconductivity Work? ;Theories Don't Fully Explain Why...

The Washington Post;  May 18, 1987 ;   Boyce Rensberger;   613 words ......simple terms, electricity is the flow of electrons, the subatomic particles that carry electrical...conductor. In ordinary conductors, the electrons move as individuals; in superconductors...all theories agree, is what allows the electrons to travel without encountering the resistance...

Feeling flat; Optoelectronics.(Bridging the gap between light and...

The Economist (US);  October 26, 2002 ;     608 words ......way to bridge the gap between light and electrons is starting to emerge WHEN Edwin Abbott...are essentially two-dimensional, the electrons being confined to conductive and semiconductive...able to build chips in which photons and electrons can have meaningful interactions, since...

Of atoms and electrons.

Sensors Magazine;  November 1, 2005 ;   Goode, Barbara G.;   409 words ......engineers to analyze materials on an atomic scale. For example, manufacturers of read...atoms, enabling metrology at the atomic scale. LEAP can tie compositional information to structure on the atomic scale, thereby allowing manufacturers...

The next small thing; Nanotechnology; Atomic-scale manufacturing.(Science...

The Economist (US);  July 7, 2001 ;     442 words ......controls the formation of crystals of hydroxyapatite at an atomic scale. The result is a version of the substance that has the strength...indistinguishable from normal, living bone. Working at the atomic scale has other advantages. Being able to tweak the ratio of calcium...

Electrons can't dance on rubber

The Milwaukee Journal Sentinel;  February 3, 2003 ;   KATHY WOLLARD;   526 words ...How Come? Electrons can't dance on rubber By KATHY WOLLARD...appliances. Each ordinary copper atom has 29 electrons orbiting its nucleus. Zillions of copper...of electricity? In a conductor, some electrons easily can slip away from their "home...

Packing electrons into an artificial atom.

Science News;  February 20, 1993 ;   Peterson, Ivars;   454 words ......atoms to study the behavior of individual electrons confined to spaces much larger than atomic...artificial atom and the result of adding electrons to it one by one this week in Boston...attraction between its nucleus and orbiting electrons. An artificial atom is more like a tiny...

Tidily tweaking electrons' twirls. (Electronic Acrobats).

Science News;  February 22, 2003 ;   Weiss, P.;   474 words ...Controlling a quantum trait of electrons that could be vital for future computers...gotten easier. Instead of manipulating electrons' spins with microscale magnetic fields...technique can also be extended to single electrons, it might lead to so-called quantum computers...

Electrons in boxes: probing artificial atoms to stretch quantum physics.

Science News;  April 11, 1998 ;   Peterson, Ivars;   787 words ......pictured as a spherical container for electrons. The attractive electrical force between the negatively charged electrons and the atom's positively charged...walls. According to quantum theory, electrons trapped in such minuscule packages...

Hydrogen reunion mediated by light. (lasers used to reunite electrons and...

Science News;  July 13, 1991 ;   Peterson, Ivars;   385 words ......succeeded in using laster light to coax electrons and protons in overlapping beams to reunite...emission of radiation, collisions between electrons and free protons rarely result in the...atoms. Under normal circumstances, the electrons nearly always escape and continue on...

Superconductors with electrons in charge.

Science News;  March 4, 1989 ;     457 words ...Superconductors with electrons in charge The discovery of a new family...Nevertheless, these new compounds, in which electrons carry the superconducting current...known examples, holes (the absence of electrons) in the electronic structure of the...

Pumping electrons: Look Ma! No heat!(heat buildup in electric...

Science News;  March 20, 1999 ;   Weiss, P.;   462 words ......scientists have developed a way of pumping electrons through tiny circuits that may eliminate...11/98, p. 236). The dot confines electrons to a region within a thin layer of a semiconductor or metal. To move electrons through their pump, the scientists...

Riding a plasma wave toward high energies. (plasma waves used to...

Science News;  April 16, 1994 ;   Peterson, Ivars;   403 words ......less costly schemes for accelerating electrons and other particles. One possibility...demonstrated that they could boost the energy of electrons injected into waves in a laboratory plasma...that a plasma wave can trap injected electrons, allowing the electrons to gain additional...

SCIENTISTS USE LIGHT TO DIFFRACT ELECTRONS

United Press International;  September 12, 2001 ;     787 words ......09-12-2001 Scientists use light to diffract electrons Sep 12, 2001 (United Press International...waves can diffract or bend a beam of electrons. The study suggests matter and light...diffraction of a beam of particles, electrons in particular, by a standing wave of...

U. Arizona nanotechnology researchers aim for atomic scale

University Wire;  October 15, 2002 ;   Ryan Johnson;   787 words ......improvement, but rather going to the ultimate limit of atomic scale electronics, said Charles Stafford, assistant professor...typical microprocessor is the size of a nickel, a signal of electrons may travel across that nickel millions of times in one...will run. That's why Stafford has turned his ...

Seeing quantum leaps at room temperature. (among electrons trapped in...

Science News;  May 21, 1994 ;   Christensen, Damaris;   345 words ......Heights, N.Y. By and large, the energy levels of electrons in a solid are closely spaced. However, quantum...naturally formed terraces on metal surfaces trap electrons and that these electrons exhibit quantum size effects. The researchers...surfaces of both gold and silver sheets on an atomic ...