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R_Colin_Johnson
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posted in July 2006

14 items
Light causes mechanical motion
News & Analysis  
7/31/2006   Post a comment
Carbon nanotubes harbor highly energetic properties, such as ballistic electron transport and electroluminescence. And the list just seems to keep growing. Now optical-to-mechanical transducers have been demonstrated based on a nanotube thin film, enabling light to directly control mechanical motion.
Biosensor made of living cells takes off for space
News & Analysis  
7/31/2006   Post a comment
Experiments in the International Space Station will soon determine whether a new biosensor that uses living cells encased in a self-assembling inorganic nanocrystal can withstand the vacuum and hard radiation of space. If successful, the experiment could yield ultrasensitive biosensors as well as a new surface treatment that repels bacteria for surgical tools like catheters. It could also serve as a test bed for medical researchers trying to understand how some bacteria, such as tuberculosis, ca
Spintronics research targets GaAs
News & Analysis  
7/28/2006   Post a comment
Researchers claim to have perfected a method for brewing exactly the right molecular arrangement for the doping of magnetic atoms needed for spintronics.
Quantum wires spin holes
News & Analysis  
7/27/2006   Post a comment
Researchers gathered this week to extend the use of quantum effects in semiconductors.
Biosensor tested on shuttle
News & Analysis  
7/26/2006   Post a comment
A recent Shuttle experiment could yield biosensors that harness living cells to detect harmful chemicals or biotoxins.
Nanocrystalline circuitry gets sprayed on
News & Analysis  
7/24/2006   Post a comment
The future of semiconductors is not chips: Instead of fabricating circuits on chips and soldering them to printed-circuit boards, Canadian researchers propose painting transparent "solution processed" circuits directly onto a device's surface. Such semiconductor circuits--from emitters for large-area displays to detectors for spray-on solar cells--could drastically lower the cost of electronic devices, the group says.

'MOMS' boost DLP applications
News & Analysis  
7/20/2006   Post a comment
A University of Delaware engineer claims to have solved a power issue that has prevented wider use of digital light processors in power-sensitive applications.
Magnetic resonance tied to superconduction
News & Analysis  
7/17/2006   Post a comment
Portland, Ore. -- Researchers believe they have unlocked the mystery to what makes high-temperature superconductors tick. According to a team from Oak Ridge National Laboratory and the University of Tennessee, the reason these materials superconduct at such high temperatures may be a magnetic resonance that causes their anti-ferromagnetic lattice to oscillate opposing-spin orientations in synchronization with the opposing-spin orientations of the so-called Cooper pairs passing through the supe
Thermoelectric polymers could heat, cool buildings
News & Analysis  
7/13/2006   Post a comment
The National Science Foundation will fund research on a solar heating and cooling prototype that seeks to replace conventional systems.
Radar hides signal, penetrates concrete
News & Analysis  
7/10/2006   Post a comment
Two problems with conventional radar make it unsuitable for many applications: Anyone with a radar receiver can tell when you activate it, and it can't image objects closer than about 100 feet. Granted, radar automatically opens the door for you at the grocery store, and Stealth bombers are supposedly transparent to radar. But the grocery store radar uses a Doppler algorithm that can only sense movement, not make images, and an aircraft can only be made invisible to radar directed at it from t
Mechanism for high-Tc superconductivty probed
News & Analysis  
7/6/2006   Post a comment
Researchers said they have moved a step closer to understanding the mechanism behind high-temperature superconductivity.
Microfluidics gain a molecular switch
News & Analysis  
7/3/2006   Post a comment
Portland, Ore. -- Microfluidics devices sense, search and sort through molecules by channeling them down nanoscale pipes that have been etched from polymer substrates. Unfortunately, the tiny channels can become clogged when biological materials stick to them, degrading their performance until they are disassembled for cleaning. Now researchers at the Rensselaer Polytechnic Institute believe they have a better solution--a material that optically switches from slippery to sticky.

Spark spots short circuits early
News & Analysis  
7/3/2006   Post a comment
Portland, Ore. -- A diagnostic spark that finds defects in wiring systems as complex as those on aircraft has been developed by researchers at Sandia National Laboratories. The Pulsed Arrested Spark Discharge (PASD) enables engineers to pinpoint the location of future short circuits before they occur, by exposing weaknesses that would eventually cause the short, according to the researchers.

Microscope exposes atoms' inner mysteries
News & Analysis  
7/3/2006   Post a comment
Portland, Ore. -- A spherical-aberration corrector has enabled the transmission electron microscope at IBM's T.J. Watson Research Center (Yorktown Heights, N.Y.) to make the highest-resolution images in the world. Instead of blurry pictures of individual atoms, the researchers have obtained clear images of the individual molecular bonds among the different types of atoms in the crystalline lattice of a semiconductor surface.



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