Navigation Links
NRL scientists elevate warfighter readiness against invisible threats
Date:2/10/2011

(WASHINGTON) -- In asymmetric warfare, early detection and identification of trace level chemical and biological agents and explosive compounds is critical to rapid reaction, response, and survivability. While there are many methods currently being used that can detect these threats, none allow for the unique fingerprinting of threat agents at trace levels.

A research team, led by Drs. Joshua Caldwell and Orest Glembocki, scientists at the U.S. Naval Research Laboratory, Electronic Science and Technology Division, has overcome this limitation with surface enhanced Raman scattering (SERS) using optically stimulated plasmon oscillations in nanostructured substrates.

Shown to provide enhancements of the Raman signal, large-area gold (Au) coated silicon (Si) nanopillar arrays are over 100 million times more sensitive than Raman scattering sensing alone, while maintaining a very uniform response with less than 30 percent variability across the sensor area.

"These arrays are over an order-of-magnitude more sensitive than the best reported SERS sensors in the literature and the current state-of-the-art large-area commercial SERS sensors," said Caldwell. "These arrays can be a key component of fully integrated, autonomously operating chemical sensors that detect, identify and report the presence of a threat at trace levels of exposure."

Raman devices use laser light to excite molecular vibrations, which in turn causes a shift in the energy of the scattered laser photons, up or down, creating a unique visual pattern. In the case of trace amounts of molecules in gases or liquids, detection through ordinary Raman scattering is virtually impossible. However, the Raman signal can be enhanced via the SERS effect using metal nanoparticles.

Despite surface-enhanced Raman scattering being first observed in the late 1970s, efforts to provide reproducible SERS-based chemical sensors has been hindered by the inability to make large-
'/>"/>

Contact: Daniel Parry
daniel.parry@nrl.navy.mil
202-767-2541
Naval Research Laboratory
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Brains radio stations have much to tell scientists
2. Smithsonian scientists discover 7 new species of fish
3. Scientists urge new research policies in wake of Gulf disaster
4. Roasting coffee beans a dark brown produces valued antioxidants: UBC food scientists
5. Scientists synthesize long-sought-after anticancer agent
6. Scientists climb Mt. Everest to explain how hearts adapt and recover from low oxygen
7. Scripps Research scientists convert skin cells to beating heart cells
8. Scripps Research scientists reveal key mechanism governing nicotine addiction
9. Scientists determine what makes an orangutan an orangutan
10. Scientists link protein to the insulation of the nervous systems wiring
11. Scientists grow human liver tissue to be used for transplantation
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NRL scientists elevate warfighter readiness against invisible threats
(Date:4/20/2015)... -- The announcement comes as demand for ... (GRM), Ireland,s foremost records management company, ... up an impressive track record of clients within the first ... records management sector in Dubai . As ... and employ a further eight staff members at its Irish ...
(Date:4/13/2015)... -- higi, a leading cloud-based consumer engagement platform that provides ... their communities around health and wellness, announced today the ... ... convenient vehicle to receive validated health information from consumers. ... API will allow higi,s trusted partners, on a user ...
(Date:4/2/2015)... Germany , April 2, 2015 ... fingerprint tests DERMALOG by far outperforms the strongest ... always maintaining high accuracy, the system is capable ... Hence, the speed proves up to be ten ... faster than its runner-up performance.      ...
Breaking Biology News(10 mins):Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 2higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 3DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3
... in California,s Yolo Bypass provide,an all-you-can-eat bug buffet ... the sea. That,s according to a new report,detailing ... fish,in harvested rice fields earlier this year, resulting ... state,s rivers. The report, provided to the ...
... leading scientists for discussions about the causative agents ... diseases of humans, including malaria, amoebic dysentery, sleeping ... Cell Biology of Eukaryotic Pathogens Symposium takes place ... environment for scientific discussions centered on current research ...
... hear relies on hair cells, sensory receptors that mechanically amplify ... channel. Although the transduction channel was characterized more than 30 ... components. A new study in The Journal of ... identification of this mystery channel. Recent studies have ...
Cached Biology News:For fish and rice to thrive in Yolo Bypass, 'just add water' 2For fish and rice to thrive in Yolo Bypass, 'just add water' 3
(Date:4/24/2015)... April 24, 2015  Pfenex Inc. (NYSE MKT: PFNX) ... biosimilar therapeutics including high value and difficult to manufacture ... offering of 6,000,000 shares of its common stock at ... Of the shares being offered, 2,610,000 are being offered ... offered by existing stockholders. Pfenex will not receive any ...
(Date:4/24/2015)... April 24 , 2015 PAREXEL International ... services provider, today announced that Partnerships in Clinical Trials ... Management, the 2015 Clinical Innovator of the Year.  The ... team for the Company,s Perceptive MyTrials ® Data-Driven ... Thursday night during the 2015 Partnership Awards in ...
(Date:4/23/2015)... Athena San Diego, an organization that ... in San Diego’s technology and life science sectors, will ... at their Gala on April 30, 2015 from 5-9pm ... http://athenasd.org/events/ , The Pinnacle Awards recognize individuals ... vision of fostering networking, risk taking and diversity of ...
(Date:4/23/2015)... 2015 BioTE Medical President and Founder ... Live Happier - Avoiding Over-Medication through Natural Hormone Balance" ... Group Conference at JW Marriott / Ritz Carlton Grande ... Healthier Live Happier, is a welcomed response to many ... for a higher quality of life thanks to bio-identical ...
Breaking Biology Technology:Pfenex Inc. Announces Pricing Of Follow-on Offering 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5Athena Pinnacle Awards to Honor Executives, Corporations and Educators Working to Promote Women Leaders 2Release and Book Signing of BioTE Medical President Gary Donovitz M.D. 'Age Healthier Live Happier' at Age Management Medicine Group (AMMG) Conference 2Release and Book Signing of BioTE Medical President Gary Donovitz M.D. 'Age Healthier Live Happier' at Age Management Medicine Group (AMMG) Conference 3
... work in MIT Institute Professor Robert Langers prolific lab sounds ... its products are already saving lives around the world in ... growing the vital tissues of the human bodyincluding skin, blood ... and intestinesin a laboratory dish instead of in the body. ...
... the promise of nanotechnology is great, but there are risks ... The new technology, which is making its way into products ... among scientists than the general public, with scientists appearing to ... of risk versus reward both groups seem to agree ...
... EATONTOWN, N.J., Feb. 15 Osteotech, Inc.,(Nasdaq: ... quarter and year,ended December 31, 2007 financial results ... call will be conducted by Sam Owusu-Akyaw,President and ... of,Osteotech management, on Wednesday, February 20, 2008, at ...
Cached Biology Technology:MIT researcher addresses biomedical engineering challenges 2MIT researcher addresses biomedical engineering challenges 3Nanotech's health, environmental impacts worry scientists and the public 2Nanotech's health, environmental impacts worry scientists and the public 3
... Cells and TriEx Insect Cell Medium are ... constructs. This cell/medium combination has been selected ... high protein expression levels observed specifically with ... note that our Ready-Plaque Sf9 Cells and ...
...
...
...
Biology Products: