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:1/19/2017)... ... January 18, 2017 , ... ... of Health (NIH) to update its Data Sharing Policy. Specifically, the nation’s leading ... grant applications subject to the existing policy. AMIA recommended that NIH earmark funding ...
(Date:1/19/2017)... ... 19, 2017 , ... FireflySci Inc. is a go-getter type of company that ... accounted to two main factors. The first is the amazing customer service that ... FireflySci products all around the world. , 2016 was a tremendous sales year for ...
(Date:1/19/2017)... 2017 The global biotechnology services outsourcing ... by 2025, according to a new report by ... adaptive of the function of outsourcing certain clinical ... the services outsourced, clinical trial management and contract ... Johnson was the first pharmaceutical company to outsource ...
(Date:1/19/2017)... 18, 2017 Acupath Laboratories, Inc., a leading ... of an Executive Committee that will guide the company,s ... John Cucci , a 15-year veteran of the ... Business Development to Chief Sales Officer .  Prior ... in senior sales leadership roles at several leading lab ...
Breaking Biology Technology:
(Date:12/16/2016)... 16, 2016 The global wearable medical device market, in ... 2021 from USD 5.31 billion in 2016, at a CAGR of ... ... technological advancements in medical devices, launch of a growing number of ... connectivity among healthcare providers, and increasing focus on physical fitness. ...
(Date:12/15/2016)... 2016  There is much more to innovative access ... engine. Continental will demonstrate the intelligence of today,s solutions ... . Through the combination of the keyless entry and ... elements, the international technology company is opening up new ... "The integration of biometric elements brings our ...
(Date:12/7/2016)... 7, 2016 According to a new market research report ... (Facial Expression, Voice Recognition), Service, Application Area, End User, And Region - Global ... from USD 6.72 Billion in 2016 to USD 36.07 Billion by 2021, at ... Continue Reading ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):