News tagged with free electrons
Radio pulses from pulsar appear to move faster than light
(PhysOrg.com) -- Laboratory experiments in the last few decades have shown that some things can appear to move faster than light without contradicting Einstein's special theory of relativity, but now astrophysicists ...
Jan 14, 2010 |
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Salt Water System Could Generate Hydrogen
(PhysOrg.com) -- The idea of generating hydrogen from salt water has often been claimed to work effectively. However, the systems proposed so far generally require a much greater energy input than the energy ...
Mar 18, 2009 |
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Shaking the Fundamentals of Physics: At the Limits of the Photoelectric Effect
With extremely short wavelengths and very high intensities, light-matter interaction seems to be different than previously accepted.
Apr 24, 2009 |
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Unpeeling atoms and molecules from the inside out
(PhysOrg.com) -- The first published scientific results from the world's most powerful hard X-ray laser, located at the Department of Energy's SLAC National Accelerator Laboratory, show its unique ability ...
Jun 30, 2010 |
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Lasers used to make first boron-nitride nanotube yarn (w/ Video)
(PhysOrg.com) -- Researchers have used lasers to create the first practical macroscopic yarns from boron nitride fibers, opening the door for an array of applications, from radiation-shielded spacecraft to ...
Nanotechnology / Nanomaterials
Dec 02, 2009 |
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How do free electrons originate?
Scientists at Max Planck Institute of Plasma Physics (IPP) in Garching and Greifswald and Fritz Haber Institute in Berlin, Germany, have discovered a new way in which high-energy radiation in water can release slow electrons. ...
Jan 20, 2010 |
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Theoretical physicists offer explanation of how bacteria might generate radio waves
(PhysOrg.com) -- Four theoretical physicists, led by Allan Widom, of Northeastern University, have published a paper in arXiv, where they show a possible way for some bacteria to produce radio waves. Taking ...
Apr 28, 2011 |
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Jefferson Lab laser twinkles in rare color
December is a time for twinkling lights, and scientists at the Department of Energy's Thomas Jefferson National Accelerator Facility are delivering. They've just produced a long-sought, rare color of laser light 100 times ...
Dec 21, 2010 |
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Elusive 'hot' electrons captured in ultra-thin solar cells
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 ...
Dec 11, 2009 |
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Jet-propelled imaging for an ultrafast light source
John Spence, a physicist at Arizona State University, is a longtime user of the Advanced Light Source at Lawrence Berkeley National Laboratory, where he has contributed to major advances in lensless imaging. ...
Jul 29, 2009 |
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Accelerators and Light Sources of Tomorrow (Part 2: Accelerating with Light)
Accelerators are far from achieving the highest energies their builders aspire to, but size and cost may limit the kinds of facilities funding agencies can support. In the future, new kinds of machines will ...
Dec 22, 2009 |
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Keep on spinning: A persistent spin state that could revolutionize spintronics
(PhysOrg.com) -- By controlling the collective spin state of highly mobile electrons in semiconductors, researchers in the Materials Sciences Division (MSD) at the U.S. Department of Energy's Lawrence Berkeley ...
Apr 02, 2009 |
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MagicJack's next act: disappearing cell phone fees
(AP) -- The company behind the magicJack, the cheap Internet phone gadget heavily promoted on TV, has made a new version of the device that allows free calls from cell phones in the home.
Jan 08, 2010 |
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Highest X-ray energy used to probe materials
Scientists for the first time have dived into the effect that an intense X-ray free electron laser (XFEL) has on materials.
Jul 22, 2010 |
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Vessel to contain cosmic force takes shape
At the heart of most celestial objects is a dynamo. The Earth's dynamo, spun to life in the molten metal core of our planet, generates a magnetic field that helps us find north and, perhaps more critically, ...
Jul 21, 2011 |
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