Navigation Links
Tiny avalanche photodiodes target bioterrorism agents

After the anthrax attacks in the United States in 2001 the threat of a larger and more deadly bioterrorism attack -- perhaps from smallpox, plague or tularemia -- became very real. But the ability to detect such biological agents and rapidly contain an attack is still being developed.

In a significant finding, researchers at Northwestern University's Center for Quantum Devices have demonstrated solar-blind avalanche photodiodes (APDs) that hold promise for universal biological agent detection. Once optimized, these sensitive detectors could be combined with the ultraviolet light-emitting diodes (LEDs) already pioneered by the Center for Quantum Devices to create an inexpensive detection system capable of identifying the unique spectral fingerprints of a biological agent attack.

The Northwestern team, led by center director Manijeh Razeghi, became the first to demonstrate 280 nanometer APDs. These devices, based on aluminum gallium nitride (AlGaN) compound semiconductors, have a photocurrent gain of more than 700.

The tiny-sized APDs should be capable of efficient detection of light with near single photon precision. Previously, photomultiplier tubes (PMTs) were the only available technology in the short wavelength UV portion of the spectrum capable of this sensitivity. These fragile vacuum tube devices are expensive and bulky, hindering true systems miniaturization.

The APD technology may see further use in the deployment of systems for secure battlefield communication. Wavelengths around 280 nanometers are referred to as the solar-blind region; in this region, the UV light is filtered out by the ozone layer providing for a naturally low background signal. Solar-blind APDs are intrinsically able to take advantage of this low background level, while PMTs must use external filters to become solar-blind. This makes secure battlefield communication possible utilizing a combination of compact, inexpensive UV LEDs and UV APDs both developed
'"/>

Source:Northwestern University


Page: 1 2

Related biology news :

1. Scientists find evidence of catastrophic sand avalanches, sea level changes in Gulf of Mexico
2. New binding target for oncogenic viral protein
3. Ancient olfaction protein is shared by many bugs, offering new pest control target
4. A bacterial genome reveals new targets to combat infectious disease
5. Muscle-targeted gene therapy reverses rare muscular dystrophy in mice
6. Researchers identify target for cancer drugs
7. Study reveals candidate targets for anti-retroviral therapeutics
8. MUHC researchers make cancer target breakthrough
9. Future diabetes drugs may target new protein interaction
10. Smart drug targets deadly brain cancer
11. NHGRI targets 12 more organisms for genome sequencing
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Tiny avalanche photodiodes target bioterrorism agents

(Date:8/27/2014)... NY (June, 2014) Outstanding basic research, a ... a dedication to patient care have earned the ... University Medical Center (CUMC) and NewYork-Presbyterian Hospital an ... the National Cancer Institute (NCI). The grant renews ... NCI-designated Comprehensive Cancer Centers in New York City ...
(Date:8/27/2014)... associated with outcomes after the repair of peripheral ... mechanism of injury, nerve injured, injury location, defect ... repair materials. However, despite numerous studies of outcomes ... is no agreement regarding the independent predictors of ... the predictors has not been quantified. A study ...
(Date:8/27/2014)... Warwick research finds , Gamblers show the same ... research has shown. , Researchers, led by Dr Elliot ... conducted tests that found that both human gamblers and ... than low-value rewards. , Published in Biology Letters ... the important role that memories of previous biggest wins ...
Breaking Biology News(10 mins):Herbert Irving Comprehensive Cancer Center awarded $18 million grant 2Herbert Irving Comprehensive Cancer Center awarded $18 million grant 3Herbert Irving Comprehensive Cancer Center awarded $18 million grant 4Gamblers are greedy bird-brains, University of Warwick research finds 2
... of Biologists is pleased to announce BIOLOGY OPEN (BiO), ... research across all aspects of the biological sciences including ... journal aims to provide rapid publication for peer reviewed, ... fields. BIOLOGY OPEN will address some big issues ...
... a big effect on their life. Some people are ... which can be detrimental to their health and wellbeing. ... , A new study led by Dr Kathryn ... York has added important experimental evidence showing that animal ...
... fish, one from a Caribbean island and one from the Yucatan ... known in any organism, according to a new UC Davis study. ... Venezuela -- and they are all pretty much the same, said ... with Peter Wainwright, a professor of evolution and ecology at UC ...
Cached Biology News:Announcing BIOLOGY OPEN from the Company of Biologists 2Animals have personalities, too 2'Explosive' evolution in pupfish 2
(Date:8/28/2014)... 2014 Supplementing their complete line ... for Eppendorf Safe Lock Centrifuge Tubes . ... highest quality tubes at an affordable price. Eppendorf ... doing chemical, medical, pharmaceutical, and life science research ... regularly able to afford Eppendorf products. , Eppendorf ...
(Date:8/27/2014)... 2014 In 2013, Lawrence ... Livermore National Security LLC (LLNS), was awarded ... a state-of-the-art laser system for the European Union's ... construction in the Czech Republic. , When commissioned ... called the " High repetition-rate Advanced Petawatt Laser ...
(Date:8/27/2014)... , Aug. 27, 2014 Reportlinker.com ... available in its catalogue: Global Chelating ... About Chelating Agent A chelating ... covalent bonds with metal ions, thereby forming a ... some metal-ions have on chemical processes, formulations, and ...
(Date:8/27/2014)... 27, 2014 Guggenheim Securities, the investment banking ... the hiring of veteran equity analyst Charles "Tony" Butler ... Butler will focus on the biotech/biopharma sector. ... of experience and a broad network of relationships in ... Director and Head of Equities at Guggenheim Securities. "His ...
Breaking Biology Technology:Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 3LLNL Synchs up with ELI Beamlines on Timing System 2LLNL Synchs up with ELI Beamlines on Timing System 3Global Chelating Agents Market 2014-2018 2Global Chelating Agents Market 2014-2018 3Global Chelating Agents Market 2014-2018 4Guggenheim Securities Hires Analyst Charles "Tony" Butler to Expand Healthcare Coverage 2
... Inc. (TSX: ONC, NASDAQ: ONCY ) ... combination REOLYSIN(R) and docetaxel clinical trial for patients ... trial is Professor Hardev Pandha of the Royal ... at the Fifth International Meeting on Replicating Oncolytic ...
... marginalized groups including the mentally ill, the disabled ... fare worse than others in the aftermath of ... , Now, a new study by UCLA ... greater terrorism-related fears and make more behavioral changes based ...
... power, and much of that juice comes from fuel cells. ... to find more efficient ways to power them. , In ... metal, is a strong candidate for providing that initial boost ... another popular fuel cell catalyst, platinum, and it,s more abundant. ...
Cached Biology Technology:Oncolytics Biotech(R) Inc. Collaborators Update Combination REOLYSIN(R) and Docetaxel Trial Results at Replicating Oncolytic Virus Meeting 2Oncolytics Biotech(R) Inc. Collaborators Update Combination REOLYSIN(R) and Docetaxel Trial Results at Replicating Oncolytic Virus Meeting 3Disabled and other vulnerable groups more susceptible to terrorism fears 2Brown chemists create more efficient palladium fuel cell catalysts 2
... for enhanced translation of cloned sequences in vitro ... The maps for pCITE-2b(+) and pCITE-2c(+) are the ... is a 3793 bp plasmid; it lacks Nde ... sites. Subtract 7 bp from all sites beyond ...
Anti-NCAPD3 Monoclonal AntibodyOther Sub-Family: not assigned-Other Applications: Immunoprecipitation, Western Blot...
...
... Slotted migration Chamber lid allows easy ... One-touch connectors for easy set up between ... safety-switch prevents current flow if the lid is ... safety and durability., Remote control can ...
Biology Products: