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:8/5/2015)... CHICAGO , August 5, 2015 ... Identity & Access Management Market by Software, Services, Vertical (BFSI, ... Chemical/Pharma), & Geography - Global Forecast to 2020", published ... Access Management Market globally into various segments. The global ... in 2014 to $546.2 Million by 2019, at a ...
(Date:8/5/2015)... 2015 The biosensors market is proving highly ... into newer sectors, and development of devices resulting in ... has seen the entry of multiple participants each year ... (Photo - http://photos.prnewswire.com/prnh/20150805/255570 ) ... the Global Biosensors Market ( http://www.frost.com/nee9 ), finds ...
(Date:8/4/2015)... -- AMRI (NASDAQ: AMRI ) today reported financial and operating results ... , Second quarter contract revenue of $ 85.2 ... Adjusted contract margins of 26 % , ... decrease in EPS from royalties in the current quarter ... "We are very pleased to present another strong financial quarter, with ...
Breaking Biology News(10 mins):Physical Identity and Access Management Market Worth $546.2 Million by 2019 2Physical Identity and Access Management Market Worth $546.2 Million by 2019 3Physical Identity and Access Management Market Worth $546.2 Million by 2019 4Innovative Biosensors Incite Use in Non-Traditional Applications 2Innovative Biosensors Incite Use in Non-Traditional Applications 3Innovative Biosensors Incite Use in Non-Traditional Applications 4AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24
... now get a peek behind the eardrum to better ... new medical imaging device invented by University of Illinois ... of non-invasive, 3-D diagnostic imaging tools for primary-care physicians. ... electrical and computer engineering professor Stephen Boppart, will publish ...
... The smoke rising from a cookstove fills the ... a cloud of pollutants and particles that threaten both ... use their cookstoves has a big effect on emissions ... reflect real-world operations, according to a study by University ...
... with glossy, chocolate-brown hair, out-sized ears and wings. They ... and hibernate in caves and mines when the weather ... deadly disease called white-nose syndrome is threatening their very ... hydrogen isotopesa kind of chemical fingerprint found in tissues ...
Cached Biology News:Nowhere to hide: New device sees bacteria behind the eardrum 2Nowhere to hide: New device sees bacteria behind the eardrum 3Study finds emissions from widely used cookstoves vary with use 2Study finds emissions from widely used cookstoves vary with use 3Chemical fingerprinting tracks the travels of little brown bats 2
(Date:8/27/2015)... ON , Aug. 27, 2015 /PRNewswire/ - BIOREM Inc. (TSXV: ... three and six-month periods ended June 30, 2015. Biorem,s complete second ... www.sedar.com ). FINANCIAL HIGHLIGHTS: in ,000,s except earnings per shareThree-months ... , 2014 , 2015 , 2014 ... 9,398 , 4,433 Gross profit , 1,656 ...
(Date:8/27/2015)... 27, 2015 In response to recent ... and The US Postal Service to no longer ... ,select agents, by the CDC, Marken reaffirmed today ... sensitive shipments. Marken uses its flexible ... and certified personnel to ensure the safe and ...
(Date:8/26/2015)... ... August 26, 2015 , ... Lee Biosolutions, a global biotech ... manufacture of highly valued cardiac markers used in early detection of heart disease ... chemistry has led to the development and commercialization of important cardiac biomarkers used ...
(Date:8/26/2015)... KONG , Aug. 26, 2015 China ... China,s leading provider of cord ... stem cell storage services, today announced that the Company ... Limited ("MO2"), an entity wholly owned by Mr. Yuen ... Company, has acquired the outstanding shares (the "Shares") of  ...
Breaking Biology Technology:BIOREM Reports $718,000 Net Earnings for the Second Quarter 2BIOREM Reports $718,000 Net Earnings for the Second Quarter 3Marken Ensures Safe Transportation Of Select Agents And Toxins 2Lee Biosolutions Announces Increased Investment in the Development and Manufacturing of Biomarkers Used in Early Detection Of Heart Disease 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3
... September 7, 2011 Scientists at The Scripps Research ... congenital hydrocephalus, one of the most common neurological disorders of ... and newborn children. The research appears in the September ... . Hydrocephalus, which involves excess buildup of cerebrospinal fluid ...
... INRS,s Energy, Materials, and Telecommunications Centre, has just received ... Chemistry. Granted by the Royal Society of Canada, the ... in the fields of molecular self-assembly and organic nanoelectonics ... Dr. Rosei has held the Canada Research Chair in ...
... 7, 2011 Cellectis (Alternext: ALCLS), the ... its nuclease production capacity has increased ten-fold ... of the nuclease manufacturing gives Cellectis bioresearch, ... of Cellectis, the potential to supply the ...
Cached Biology Technology:Scripps research scientists find clue to cause of childhood hydrocephalus 2Scripps research scientists find clue to cause of childhood hydrocephalus 3Scripps research scientists find clue to cause of childhood hydrocephalus 4Cellectis Announces a Ten-Fold Increase in Nuclease Production Capacity in 2011 2
Immunogen: Synthetic peptide (aa sequence is considered to be commercially sensitive) Storage: -20 C, Avoid Freeze/Thaw Cycles...
... Immunogen: Fusion protein derived from ... ASIP/PAR-3 (atypical PKC isotype-specific interacting protein/ ... not related to the protease-activated-receptors also ... Xenopus (positive controls: Caco-2 MDCK A6 ...
... C-1-tetrahydrofolate synthase, ... [Includes: Methylenetetrahydrofolate dehydrogenase ... cyclohydrolase (EC 3.5.4.9); ... 6.3.4.3)]. [Source:Uniprot/SWISSPROT;Acc:P11586] ...
...
Biology Products: