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Tiny avalanche photodiode detects single UV photons
01-28-2008 · EurekAlert!Researchers at Northwestern University's McCormick School of Engineering have demonstrated visible-blind avalanche photodiodes capable of detecting single photons in the ultraviolet region (360-200 nm). The Northwestern team, led by Manijeh Razeghi, Walter P. Murphy Professor of Electrical Engineering and Computer Science at Northwestern's McCormick School of Engineering, became the world's first to demonstrate back-illuminated single photon detection from a III-nitride photodetector.
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Keywords: tiny, avalanche, photodiode, detects, single, photons, detect, photon
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- DNA sieve -- Nanoscale pores can be tiny analysis labs
05-11-2007 · EurekAlert!
A international team led by researchers at the National Institute of Standards and Technology has proven for the first time that a single nanometer-scale pore in a thin membrane -- resembling one found in a living cell -- can be used to accurately detect and sort different-sized polymer chains (a model for biological molecules) that pass through the channel.
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- Faster X-ray interferometers due to single-photon interference
12-18-2007 · EurekAlert!
By means of X-ray interferometers, lengths down to the mm range can be measured with a resolution of less than one nm. The low translation velocity of the interferometers, which made their use in practice more difficult, could now be increased by a factor of 100 by exploiting the temporal correlation of singly interfering X-ray photons.
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- Microscopic sea creatures provide foundation for gas sensors and other devices
03-08-2007 · EurekAlert!
The three-dimensional shells of tiny ocean creatures could provide the foundation for novel electronic devices, including gas sensors able to detect pollution faster and more efficiently than conventional devices.
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- Micro microwave does pinpoint cooking for miniaturized labs
11-08-2007 · EurekAlert!
Researchers at NIST and George Mason University have demonstrated what is probably the world's smallest microwave oven, a tiny mechanism that can heat a pinhead-sized drop of liquid inside a container slightly shorter than an ant and half as wide as a single hair.
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- Implantable device designed to detect, stop seizures under study at MCG
09-10-2007 · EurekAlert!
A small device implanted in the skull that detects oncoming seizures, then delivers a brief electrical stimulus to the brain to stop them is under study at the Medical College of Georgia.
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- New system would use rotating magnetic field to detect pathogens
10-29-2007 · EurekAlert!
Researchers at Purdue and Duke universities have developed a technique that uses a magnetic field to selectively separate tiny magnetic particles, representing a highly sensitive method for potentially diagnosing disease by testing samples from patients.
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- Green algae -- the nexus of plant/animal ancestry
10-11-2007 · EurekAlert!
Genes of a tiny, single-celled green alga called Chlamydomonas reinhardtii may contain scores more data about the common ancestry of plants and animals than the richest paleontological dig. This work is described in an article in the Oct. 12, 2007, issue of Science.
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- Scientists Use Carbon Nanotube Networks To Detect Defects In Composites
10-06-2006 · ScienceDaily
University of Delaware researchers have discovered a means to detect and identify damage within advanced composite materials by using a network of tiny carbon nanotubes, which act in much the same manner as human nerves.
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- A new portable biosensor detects traces of contaminants in food more quickly and cheaply
05-17-2007 · EurekAlert!
Scientists at the Universitat Autònoma de Barcelona and the CSIC, have developed a new electrochemical biosensor which detects the presence of herbicides as well as antibiotics in food. The biosensor is faster, more portable and economic than usual laboratory methods, while having a similar sensitivity. The system has been tested successfully to detect pesticides in samples of drinking water and commercial orange juice, as well as to detect traces of antibiotics in cow's milk.
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- Gene determines whether male body odor smells pleasant
09-16-2007 · EurekAlert!
Up to one-third of adult humans cannot perceive an odor in a component of male body odor that induces physiological responses in both men and women. To those who do, androstenone either takes on a pleasant sweet odor or a repulsive urine-like one. New research from Rockefeller University and Duke University traces this variability to mutations in a single odorant receptor gene, a finding that raises questions of how people detect other people’s body odor.
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