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Elusive 'hot' electrons captured in ultra-thin solar cells

Physics / General Physics

created Dec 11, 2009 | popularity 4.5 / 5 (12) | comments 3

Boston College researchers have observed the "hot electron" effect in a solar cell for the first time and successfully harvested the elusive charges using ultra-thin solar cells, opening a potential avenue to improved solar ...


Gallium nitride transistor could replace silicon

Gallium nitride transistor could replace silicon

Physics / General Physics

created Dec 08, 2009 | popularity 4.7 / 5 (36) | comments 6

(PhysOrg.com) -- A Cornell researcher has created an extremely efficient transistor made from gallium nitride, which may soon replace silicon as king of semiconductors for power applications.


Researchers demonstrate 100-watt-level mid-infrared lasers

Physics / Quantum Physics

created Dec 01, 2009 | popularity 4.7 / 5 (12) | comments 0

Northwestern University researchers have achieved a breakthrough in quantum cascade laser output power, delivering 120 watts from a single device at room temperature.


Scientists demonstrate multibeam, multi-functional lasers

Scientists demonstrate multibeam, multi-functional lasers

Physics / General Physics

created Nov 30, 2009 | popularity 4.4 / 5 (7) | comments 0

An international team of applied scientists from Harvard, Hamamatsu Photonics, and ETH Zürich have demonstrated compact, multibeam, and multi-wavelength lasers emitting in the invisible part of the light spectrum ...


Researchers Design Triple Quantum Dot for Quantum Information Applications

Researchers Design Triple Quantum Dot for Quantum Information Applications

Nanotechnology / Nanophysics

created Nov 30, 2009 | popularity 4.7 / 5 (18) | comments 0 feature

(PhysOrg.com) -- While quantum dots have existed since the 1980s, only in the past decade have physicists successfully created lateral few-electron single quantum dots. These quantum dots enable physicists ...


Using superconducting probes to get a picture of what it's like inside CNTs

Nanotechnology / Nanophysics

created Nov 20, 2009 | popularity 4.4 / 5 (9) | comments 0 feature

(PhysOrg.com) -- "Carbon nanotubes are exciting for fundamental physics, and for potential technological applications," Nadya Mason tells PhysOrg.com. "However, we are generally limited in the way that we can study them. ...


Nanotube defects equal better energy and storage systems

Nanotube defects equal better energy and storage systems

Nanotechnology / Nanomaterials

created Nov 19, 2009 | popularity 4.5 / 5 (11) | comments 2

(PhysOrg.com) -- Most people would like to be able to charge their cell phones and other personal electronics quickly and not too often. A recent discovery made by UC San Diego engineers could lead to carbon ...


Building a more versatile laser

Building a more versatile laser

Physics / Optics & Photonics

created Nov 16, 2009 | popularity 4.5 / 5 (19) | comments 0 feature

(PhysOrg.com) -- One of the drawbacks associated with using semiconductor lasers is that many of them can only produce a beam of a single wavelength, and can only send that beam in one direction at a time. ...


Researchers invent new method for graphene growth

Researchers invent new method for graphene growth

Nanotechnology / Nanomaterials

created Nov 10, 2009 | popularity 4.9 / 5 (23) | comments 0

(PhysOrg.com) -- A Cornell research team has invented a simple way to make graphene electrical devices by growing the graphene directly onto a silicon wafer.


H1N1 Virus Can Be Killed by Acidic Ozone Water

H1N1 Virus Can Be Killed by Acidic Ozone Water

Chemistry / Biochemistry

created Nov 09, 2009 | popularity 4.5 / 5 (44) | comments 16 feature

(PhysOrg.com) -- Scientists have found that acidic ozone water can deactivate H1N1 viruses very effectively, offering a promising disinfectant for the millions of people trying to avoid the disease. Acidic ...


Tiny Music Player Made from Wire Bridge

Tiny Music Player Made from Wire Bridge (w/ Video)

Physics / General Physics

created Nov 04, 2009 | popularity 4.2 / 5 (18) | comments 1 feature

(PhysOrg.com) -- In 2008, scientists built a loudspeaker made of carbon nanotubes that produced sound and music based on the thermoacoustic effect. Now, a different team of scientists has built a loudspeaker ...


Harvesting Energy from Natural Motion: Magnets, Cantilever Capture Wide Range of Frequencies

Harvesting Energy from Natural Motion: Magnets, Cantilever Capture Wide Range of Frequencies

Physics / General Physics

created Oct 28, 2009 | popularity 4.1 / 5 (11) | comments 4

(PhysOrg.com) -- By taking advantage of the vagaries of the natural world, Duke University engineers have developed a novel approach that they believe can more efficiently harvest electricity from the motions ...


Caltech scientists solve decade-long mystery of nanopillar formations

Scientists solve decade-long mystery of nanopillar formations

Nanotechnology / Nanophysics

created Oct 22, 2009 | popularity 5 / 5 (23) | comments 2

Scientists at the California Institute of Technology have uncovered the physical mechanism by which arrays of nanoscale pillars can be grown on polymer films with very high precision, in potentially limitless ...


New Twist on Favorite X-ray Technique Promises Ultrafast Molecular Studies

New Twist on Favorite X-ray Technique Promises Ultrafast Molecular Studies

Physics / General Physics

created Oct 12, 2009 | popularity 4 / 5 (5) | comments 1

(PhysOrg.com) -- A team of physicists from the Stanford Synchrotron Radiation Lightsource, including graduate student David Bernstein, have made a promising discovery that a well-known synchrotron technique ...


Researchers create smaller and more efficient nuclear battery

Researchers create smaller and more efficient nuclear battery

Technology / Energy

created Oct 07, 2009 | popularity 4.8 / 5 (27) | comments 14

(PhysOrg.com) -- Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are ...