Navigation Links
Glowing films developed by UC San Diego chemists reveal traces of explosives
Date:6/26/2008

New spray-on films developed by UC San Diego chemists will be the basis of portable devices that can quickly reveal trace amounts of nitrogen-based explosives.

Contaminated fingerprints leave dark shadows on the films, which glow blue under ultraviolet light. One of the films can distinguish between different classes of explosive chemicals, a property that could provide evidence to help solve a crime, or prevent one.

A recent episode of CSI: Miami featured the technology, which linked fingerprints left on a video camera to a bomb used in a bank heist, revealing the motive for the robbery. In real life, the security systems company RedXDefense has developed a portable kit based on the technology that security officers could use with minimal training.

Detection relies on fluorescent polymers developed at UCSD by chemistry and biochemistry professor William Trogler and graduate student Jason Sanchez. Its a very intuitive detection method that doesnt require a scientist to run, Trogler said.

Sanchez and Trogler describe the synthesis and properties of their polymers in a forthcoming issue of the Journal of Materials Chemistry.

The polymers emit blue light when excited by ultraviolet radiation. Nitrogen-based explosive chemicals such as TNT quench that glow by soaking up electrons.

Because the polymers fluoresce brightly, no special instruments are needed to read the results. Only a very thin film sprayed on a suspect surface is needed to reveal the presence of a dangerous chemical. A single layer of the polymer, about one thousandth of a gram, is enough to detect minute amounts of some explosives, as little as a few trillionths of a gram (picograms) on a surface a half-foot in diameter. Handling explosives can leave 1,000 times that quantity or more stuck to fingers or vehicles.

The films also adhere directly to potentially contaminated surfaces, making them more sensitive than previous methods, which rely on capturing molecules that escape into the air.

Detection can be fast, revealing incriminating fingerprints as soon as the solvents dry, within 30 seconds. Exposure to ultraviolet light for an minute or two alters one of the films so that traces a nitrate esters, a class chemicals that includes the highly explosive PTEN, begin to glow green. Traces of other classes of explosives, such as nitroaromatics like TNT, stay dark.

Troglers group is currently developing similar systems to detect explosives based on peroxides.


'/>"/>

Contact: Susan Brown
sdbrown@ucsd.edu
858-246-0161
University of California - San Diego
Source:Eurekalert

Related biology technology :

1. Glowing zebrafish help researchers track role of sugars in the cell
2. NIST team develops novel method for nanostructured polymer thin films
3. GE Energy to market SNS-developed detector electronics system
4. CMPMedica Expands SearchMedica.com with Multiple Additional Vertical Search Applications co-developed with Convera(R)
5. Fourth Genmab Antibody Developed Under Roche Collaboration to Enter Clinic
6. Model for the assembly of advanced, single-molecule-based electronic components developed at Pitt
7. Worlds most complex silicon phased-array chip developed at UC-San Diego
8. Industry-First Telephone for Health Care Developed by CyraCom
9. Cepheid Enters Agreement To Exclusively License HPV Portfolio Developed by Quantovir AB
10. HDSA-San Diegos Team 2CureHD Continues its Race to Cure Huntingtons Disease
11. UC San Diego nanostructures will raise thin-film solar cell efficiency
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/3/2016)... ... February 03, 2016 , ... Aerocom, a world-leading supplier of ... North American healthcare market. , Aerocom Healthcare, LLC will be based in Denver, ... provide new pneumatic tube systems or expand existing systems within the U.S. and ...
(Date:2/3/2016)... Milpitas, Calif. (PRWEB) , ... February 03, 2016 ... ... supply chain events annual report which summarizes and analyzes nearly 750 ... global event monitoring, alert, and analysis service. , Supply chain risk management ...
(Date:2/3/2016)... ... February 03, 2016 , ... ... aid in the rapid development and ongoing quality control of molecular assays targeting ... is extremely high,” Dr. Gregory R. Chiklis, President and CEO of ZeptoMetrix, relayed ...
(Date:2/3/2016)... San Mateo, CA (PRWEB) , ... February 03, 2016 , ... ... perseverance of those who have sacrificed so much for our country. CereScan, a nationally ... key sponsor of The Wounded Warrior Amputee Football Team (WWAFT) vs. NFL Stars Flag ...
Breaking Biology Technology:
(Date:1/25/2016)... --  Unisys Corporation (NYSE: UIS ) today announced the ... Airport, New York City , to help ... enter the United States using passports that ... testing of the system at Dulles last year. The system ... January 2016. --> pilot testing of the system ...
(Date:1/20/2016)... A market that just keeps on growing. ... explosion in genomics knowledge. Learn all about it in ... of dynamic trends are pushing market growth and company ... pharmacogenomics - pathogen evolution - next generation sequencing - ... understanding of the role of genetic material in Disease ...
(Date:1/13/2016)... ALBANY, New York , January 13, 2016 /PRNewswire/ ... Transparency Market Research has published a new market report ... Share, Growth, Trends, and Forecast, 2015 - 2023. According to ... mn in 2014 and is anticipated to reach US$1,625.8 ... from 2015 to 2023. In terms of volume, the ...
Breaking Biology News(10 mins):