Navigation Links
Researchers improve technology to detect hazardous chemicals
Date:11/20/2012

Scientists at Imperial College London have developed a system to quickly detect trace amounts of chemicals like pollutants, explosives or illegal drugs.

The new system can pick out a single target molecule from 10 000 trillion water molecules within milliseconds, by trapping it on a self-assembling single layer of gold nanoparticles.

The team of scientists, all from the Department of Chemistry at Imperial, say this technology opens the way to develop devices that are compact, reusable and easy to assemble, and could have a range of uses including detecting illegal drugs, explosives, pollutants in rivers or nerve gases released into the air. Results of the research are published this week in Nature Materials.

In one potential use, such a device could detect tiny traces of explosives or other illegal substances left behind by criminals on the surfaces they touch. The advances made by this team would help law enforcers to identify and deal with such activities involving illegal substances.

Research co-author, Michael Cecchini, said: "Our system could solve a key problem of reliable and portable chemical testing for use in the outside world. It is very sensitive and could well be used to look for very small amounts of a specific molecule even in busy, public areas."

The target molecules are identified by an effect called Surface Enhanced Raman Scattering (SERS) of light. This technique, which has been around since the late 1970's, works because each molecule scatters light in a unique way. Previous research has shown that the signal can be amplified by catching molecules in a particular way on a layer of metal nanoparticles. However, these sheets are complex to manufacture.

The scientists overcame this problem by dealing with interfaces of two liquids that do not mix, such as water and oil, or water and air interface. By manipulating the electrical charge of the gold nanoparticles and the composition
'/>"/>

Contact: Simon Levey
s.levey@imperial.ac.uk
44-020-759-46702
Imperial College London
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
2. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
3. Multidisciplinary team of researchers develop world’s lightest material
4. Researchers shrink tumors and minimize side effects using tumor-homing peptide to deliver treatment
5. Innovative MetaMorph® NX Software Shatters Barriers Between Researchers and Image Analysis Goals with Exclusive Visual Workflow
6. UCLA researchers demonstrate fully printed carbon nanotube transistor circuits for displays
7. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
8. Two Top Biological Imaging Centers Offer Powerful Free Online Tool to Researchers, Educators, and Public
9. Researchers develop one of the worlds smallest electronic circuits
10. MU researchers identify key plant immune response in fight against bacteria
11. Researchers realize high-power, narrowband terahertz source at room temperature
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers improve technology to detect hazardous chemicals
(Date:8/28/2014)... research platform uses a laser to measure ... stress and heating, an approach likely to ... and batteries., This new technique, called nanomechanical ... and the surface stress of microscale structures ... the merits of surface-stress influence on mechanical ...
(Date:8/28/2014)... 2014  Next month, executives from clinical trial marketing firm ... beginning with Patient-Centered Clinical Trials 2014 , to be ... , September 4-5. Patient recruitment experts Bonnie A. ... will share insights on the benefits of employing an ... – from media to mobile apps – can be used ...
(Date:8/28/2014)... Fla. Exciting new work by a Florida State ... system that can take your temperature, emit white light, ... And, the molecule looks like a butterfly. , Biwu ... Biomedical Engineering in the FAMU-FSU College of Engineering, created ... but has continued to discover that his creation has ...
(Date:8/28/2014)... (PRWEB) August 28, 2014 PrimeSource ... construction materials, selected SoundConnect to support ... cloud based audio and web conferencing platform GlobalMeet ... support PrimeSource’s employees’ needs. SoundConnect delivers award ... , PrimeSource Building Products will be utilizing ...
Breaking Biology Technology:New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3BBK Worldwide Leads Sessions at Key September Events 2Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices 2PrimeSource Chooses SoundConnect as Collaboration Provider 2
... launched interactive, personalized services for Milwaukee drivers through ... announced Thursday. Traffic.com will provide area commuters with ... roadway traffic conditions including congestion levels, incidents, travel ... news release. , ,Data for the site will ...
... actors from two hemispheres came together outside Madison Friday ... Kazusa DNA Research Institute signed off on ... three-year agreement will involve exchanges between the Kazusa Institute, ... genome, and Promega with its technology for expressing and ...
... Systems, Inc. on Monday announced a 20.3 percent increase in ... quarter of production and shipment of its MRI monitor to ... year-end numbers, the company said fourth-quarter net sales for fiscal ... $6,667,617 for the same period of fiscal year 2004. , ...
Cached Biology Technology:Promega, Japanese lab announce partnership 2
(Date:8/28/2014)... German . ... to a striking pattern of blue stripes alternating with golden ... cells, and yellow cells emerge during growth in the skin ... mosaic to compose the characteristic colour pattern. ,While ... interact to form proper stripes, the embryonic origin of the ...
(Date:8/28/2014)... Minn. A Mayo Clinic researcher and his collaborators ... up and enhance the process of re-engineering cells for ... uses network biology methods to aid stem cell engineering. ... engineering are described in two back-to-back papers in the ... a broad range of uses for all types of ...
(Date:8/28/2014)... groups and clinicians is critical to the development ... of Georgia research. , A qualitative study of ... that role models for successful breastfeeding help positively ... "Mothers who received that support are more likely ... Alex Anderson, an associate professor in the College ...
Breaking Biology News(10 mins):How the zebrafish gets its stripes 2How the zebrafish gets its stripes 3New tool aids stem cell engineering for medical research 2Breastfeeding study shows need for effective peer counseling programs 2
... life sciences journal F1000Research is that ... the article. Openly sharing data is an important step in ... published research, as well as enabling data reuse. ... the data in the journal,s articles to be assessed and ...
... balanced interplay of four molecules that trigger and govern ... an important basic science discovery, it helps explain why ... genes cannot fight infection effectively, and develop rare and ... of a number of different types of cells that ...
... poison-dart frog, a red male isn,t much brighter than a green ... the green and red variants of the same species of frog ... Ecology and Sociobiology , led by Beatriz Willink of the Universidad ... The bright colors of poison-dart frogs serve not only ...
Cached Biology News:F1000Research launch data plotting tool 2Molecular interplay explains many immunodeficiencies 2Green poison-dart frog varies mating call to suit situation 2
MOUSE ANTI SIMIAN VIRUS 5 Immunogen: Simian virus 5...
... Serum • Beagle serum is collected from ... year of age Available Anticoagulants: ... N-06: K2EDTA N-08: Potassium ... Alsevers N-05: ACD N-07: ...
MOUSE ANTI BOVINE TROPONIN I...
Normal donkey serum collected from healthy normal donkeys....
Biology Products: