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:5/11/2015)... , May 11, 2015  Through a well-rounded UAS ... had a strong showing at AUVSI,s Unmanned 2015 ... representatives of Ohio,s UAS industry met ... abroad from all points along the UAS ecosystem. ... Coalition,s (DDC) Vice President for Aerospace Rich Knoll . ...
(Date:5/6/2015)... , May 6, 2015 LifeBEAM, a developer ... helmet producer, announced today that they will expand their ... world,s first bio-sensing cycling helmet and the first joint ... two new colors in order to give cyclists more ... In addition, LifeBEAM and Lazer announced their plan to ...
(Date:4/21/2015)... April 21, 2015 High ... policies are boosting access control systems market in ... to a recently published report by TechSci Research " ... the access control systems market in Saudi ... by 2020.The access control systems market in the Kingdom ...
Breaking Biology News(10 mins):Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3Saudi Arabia Access Control Systems Market to Touch USD1.2 Billion by 2020 Says TechSci Research 2Saudi Arabia Access Control Systems Market to Touch USD1.2 Billion by 2020 Says TechSci Research 3
... thought that interactions between plants and pollinating insects hasten ... show that some interactions between plants and pollinators are ... in some instances, reduce it. Findings, published in ... local populations of one of the most distinctive plants ...
... of salmonella caused by infected eggs resulted in thousands ... Now, University of Missouri researchers have created a new ... produce faster and more accurate results than most currently ... contaminated eggs from being shipped to stores. ...
... from the Harvard School of Public Health (HSPH) finds that ... a problem of the rich. The findings suggest that the ... already happened in wealthier countries has not yet happened in ... of the American Journal of Clinical Nutrition and ...
Cached Biology News:The puzzle of biological diversity 2MU scientist develops salmonella test that makes food safer, reduce recalls 2Overweight primarily a problem among wealthier women in low- to middle-income countries 2
(Date:5/28/2015)... , May 27, 2015 Research ... of Jain PharmaBiotech,s new report "Cell Therapy ... offering. This report describes and evaluates ... started to play an important role in the ... replacing the old fashioned bone marrow transplants. Role ...
(Date:5/28/2015)... May 28, 2015 The Academy of Model ... Aviation Day on August 15, 2015. National Model Aviation Day ... and to introduce model flying to the general public. , ... clubs to participate in the celebration by hosting events in ... host National Model Aviation Day events. View our online ...
(Date:5/28/2015)... Calif. , May 28, 2015 ... today announced a study published in Ultrasound ... Panorama single-nucleotide polymorphism (SNP)-based non-invasive prenatal test (NIPT) ... first trimester. A study based ... complete molar pregnancies occur in about 1 in ...
(Date:5/28/2015)... BioNorth Texas (BioNorthTX), an independent, ... life sciences industry in northern region of Texas, ... The Foundry in Dallas on April 27, 2015. ... a broad spectrum of biotech professionals from the ... successes in partnering with key life sciences organizations ...
Breaking Biology Technology:Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2Model flying pilots celebrate the Academy of Model Aeronautics Foundation’s Third Annual National Model Aviation Day 2First Confirmed Detection of a Complete Molar Pregnancy with Cell-Free DNA Test 2First Confirmed Detection of a Complete Molar Pregnancy with Cell-Free DNA Test 3BioNorthTX Holds Inaugural Board of Directors Meeting 2BioNorthTX Holds Inaugural Board of Directors Meeting 3
... This Thursday, the 17th annual SBIR/STTR Conference will be ... at the Crowne Plaza in Madison, 4402 E. Washington. ... Business Innovation Research (SBIR) and Small Business Technology Transfer ... billion federal dollars available to small businesses for technological ...
... Corporation, a growth company of ... its Cequent Transportation Accessories Group ... provider of zinc plating services. ... Wis. and has been a ...
... worldwide leader in e-document delivery ... and VSI-FAX(R) product families, announces ... This new solution allows Lotus ... efficiently, effectively, and economically with ...
Cached Biology Technology:Annual Conference Honors Tech Grant Winners 2
... acid analysis standard is a ... salts; molecular weights range from ... is provided for use with ... the organic acid analysis kit ...
... demonstrated that oxidative stress is involved in ... stress is the condition in which an ... exist leading to the damage of a ... stress is through several antioxidant systems4 that ...
... Versatile affinity matrix for the extraction ... proteins or other macromolecules, Applications: ,Reducing ... of the interaction of pure β-adrenergic ... Removing residual SDS in 6 M ...
Values of steady state parameters for enzyme activities are determined....
Biology Products: