HOME >> BIOLOGY >> NEWS
UCSD chemists develop portable nerve gas sensor

cules of hydrogen fluoride hit its surface. "These silicon interferometers can detect very, very small changes in color," says Sailor.

The key to their sensitive detection is the use of a small laser, similar to that found in CD players, which measures the small changes in intensity of light reflecting from the optical coating on the surface of the silicon chip. "It turns out that if you take a laser that's at the right frequency that matches the properties of that layer, you can measure very small amounts of chemicals as they enter the coating," says Sailor.

While the diode laser that the UCSD scientists built for their sensor is a bit more sophisticated than those in inexpensive CD players, it can be reproduced cheaply. In fact, the researchers' first sensors were constructed from five inexpensive CD players they purchased at Fry's, a local electronics discounter. "Our program manager at the Defense Advanced Projects Research Agency, which sponsored our research, raised an eyebrow when I told him that story," says Sailor. "But for 24 bucks, we got an interferometer that was sensitive enough to detect chemicals in the parts per billion range."

The low-cost feature of the UCSD design should make it possible to deploy handfuls of sensors in a terrorist nerve-gas attack, like the 1995 Tokyo subway bombing, in which sarin was used. Because the laser is capable of recording the accumulation of hydrogen fluoride molecules on the silicon chip's surface, the sensor can also be used as a dosimeter. "You can tell how much nerve gas an area has been exposed to," says Sailor.

He says the main advantage of the sensor is that it is more specific to the detection of G-type nerve agents than the surface acoustic-wave devices, which are currently used to detect nerve gas, but which tend to produce an excess of false alarms.

"The advantage of this new development is that we'll be able to reduce the false-alarm rate," adds Sailor, whose team p
'"/>

Contact: Kim McDonald
kimmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
20-Aug-2000


Page: 1 2 3

Related biology news :

1. NIH roadmap for biomedical research focus of chemists at American Chemical Society meeting
2. New multidisciplinary research tops chemists meeting Aug. 22-26
3. Wisconsin chemists find a new chink in TBs armor
4. UCLA chemists develop new coating for nanoscale probes
5. NJIT chemists pave way for cheap, usable field test for polluted, toxic, water, air, food
6. Frog skin and supercomputers lead Penn chemists to designing better bacteria killers
7. Purdue chemists put the twist on protein building block
8. New pollutant cleanup technique puzzles, pleases chemists
9. Homeland security symposium covers what chemists can do to help protect the nation
10. Michigan, Connecticut and Illinois chemists receive award for drug to combat antibiotic resistance
11. Carnegie Mellon University chemists create versatile polymer brushes

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: UCSD chemists develop portable nerve gas sensor

(Date:2/23/2015)... , Feb. 23, 2015 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... provisional patent 62114357 for DISTRIBUTED VOICE DIRECTED ... NXT-ID introduces a new groundbreaking payment method. Payment accounts ... account may only be accessed if both the speech ...
(Date:2/12/2015)... Feb. 12, 2015   MedNet Solutions , ... clinical study management systems, has recently bolstered its ... distinguishing iMedNet as the ... (CROs) and healthcare consultants.  Building on the Program,s ... referrals and numerous co-marketing opportunities), MedNet,s new and ...
(Date:2/9/2015)... Texas , Feb. 9, 2015  Lintec of ... fabrication methods for carbon nanotube (CNT) macrostructures, including sheets, ... at Dallas (UTD). Leveraging the vast industrial ... Tokyo, Japan , Lintec of America is ... Richardson, TX , focusing on scaling up ...
Breaking Biology News(10 mins):NXT-ID Patents Voice Directed Payments 2NXT-ID Patents Voice Directed Payments 3MedNet Solutions Announces Key Enhancements To Its iMedNet Partner Program 2Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 2Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 3Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 4
(Date:2/26/2015)... , Feb. 26, 2015 /PRNewswire/ - SQI Diagnostics Inc. ... life sciences company that develops and commercializes proprietary technologies ... financial and operational results for the fiscal first quarter ... release are in Canadian dollars (CAD), unless otherwise stated. ... to win new business from our existing customers and ...
(Date:2/26/2015)... Feb. 26, 2015   Regulus Therapeutics Inc . ... the discovery and development of innovative medicines targeting microRNAs, ... President and Chief Executive Officer of Regulus, will present ... th Annual Healthcare Conference on Wednesday, March 4, ... held at the Boston Marriott Copley Place.  ...
(Date:2/26/2015)... , Feb. 26, 2015 DuPont Executive ... priorities driven by key research advancements and product launches ... today,s Bank of America Merrill Lynch 2015 Global Agriculture ... challenge of building grain supplies the last two years, ... at the pace of the last decade, when demand ...
(Date:2/26/2015)... NJ (PRWEB) February 26, 2015 On ... and its affiliated companies, Wilentz, Goldman & Spitzer, ... a trade secrets lawsuit against Genewiz Inc. in excess ... obtained and utilized GenScript’s trade secrets, and that it ... The court entered an order denying motions for judgment ...
Breaking Biology Technology:SQI Diagnostics Reports First Quarter Financial Results 2SQI Diagnostics Reports First Quarter Financial Results 3SQI Diagnostics Reports First Quarter Financial Results 4SQI Diagnostics Reports First Quarter Financial Results 5SQI Diagnostics Reports First Quarter Financial Results 6Regulus to Present at Cowen and Company 35th Annual Healthcare Conference 2Regulus to Present at Cowen and Company 35th Annual Healthcare Conference 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 4DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 5Wilentz Client GenScript Awarded $10 Million in Trade Secrets Case Against Genewiz 2Wilentz Client GenScript Awarded $10 Million in Trade Secrets Case Against Genewiz 3
Cached News: