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:8/19/2014)... August 19, 2014 Robin Williams’ passing ... can take on an individual. Symptoms range from ... expression, problems swallowing and severe depression. Parkinson’s disease ... off of dopamine producing neurons of the brain. ... disease that slowly and progressively gets worse, they look ...
(Date:8/19/2014)... 2014 Research and Markets ... "Spectroscopy Equipment and Accessories - Global ... offering. This report analyzes ... Accessories in US$ Thousands by the following ... Spectrometers, NMR-EPR Spectrometers, Near Infrared (NIR) Spectrometers, ...
(Date:8/19/2014)... 19, 2014 In November 2012, the European ... Evaluation Report (PBRER) in a new PSUR – responding to ... benefit-risk profile of a drug. Adopted in many regions, the ... Present a comprehensive and critical analysis of new or ... Highlight any new evidence of the potential benefits of ...
(Date:8/19/2014)... - iCo Therapeutics Inc. ("iCo" or "the Company") (TSX-V: ... Oral Amphotericin B (Oral Amp B) drug candidate ... ImmuneCarta®, the immune monitoring business unit of Caprion, ... Amp B in reactivating latent HIV viral reservoirs ... with antiretroviral therapy. Memory cells, ...
Breaking Biology Technology:As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 2As We Mourn Robin Williams’ Passing, His Death Sheds Light on Patients Struggling with Parkinson’s Disease 3Global Spectroscopy Equipment and Accessories - Strategic Business Report 2014 2Top Five Best Practices for Developing Your Periodic Benefit Risk Evaluation Report (PBRER), New Webinar Hosted by Xtalks 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 3
... ability to drive clients, success in managed care, ... Group, a,full-service managed market agency focused on securing ... of Dan Renick, RPh,as Managing Partner. Renick will ... biotech clients, including GlaxoSmithKline,sanofi-aventis, and Forest Laboratories., ...
... Abbott will present,at the Goldman Sachs Twenty-Ninth ... Thomas C. Freyman, executive vice president,finance and chief ... at 3:20 p.m. Central time., A live ... through,Abbott,s Investor Relations Web site at http://www.abbottinvestor.com ...
... China, May 28 /Xinhua-PRNewswire-FirstCall/ -- 3SBio Inc.,(Nasdaq: ... focused on researching,developing, manufacturing and marketing biopharmaceutical ... Chief Operating Officer, and,Kevin Teo, Chief Financial ... Annual Global Healthcare Conference in Dana Point, ...
Cached Biology Technology:Dan Renick, RPh, Joins The Hobart Group as Managing Partner 2
(Date:8/20/2014)... In leaves, photosystem 1 (PS1) absorbs light and ... of carbon dioxide to biomass. Photovoltaic devices, mostly ... light but produce electricity. One approach for the ... replacing the semi-conductor with the isolated membrane protein ... isolates a highly stable PS1 from thermophilic cyanobacteria ...
(Date:8/19/2014)... China,s increasing caesarean section rate, suggests a new commentary ... Journal of Obstetrics and Gynaecology (BJOG) . , China ... the world. Of 16 million babies born in 2010, ... is not known, the current Chinese language literature on ... from 36% to 58%. However, before the 1980s, the ...
(Date:8/19/2014)... Wind and ... amount of electricity is to be produced with renewable energy ... stored during productive periods so that these fluctuations can be ... for the purpose. Science and industry are therefore working on ... that used to be too expensive or unsophisticated to be ...
Breaking Biology News(10 mins):A semi-artificial leaf faster than 'natural' photosynthesis 2Is China's 50 percent cesarean section delivery rate too high? 2Is China's 50 percent cesarean section delivery rate too high? 3Asian inventions dominate energy storage systems 2Asian inventions dominate energy storage systems 3
... (March 28, 2011)Understanding that angioplastya medical treatment used by ... and chest to improve blood flowis safe may encourage ... for individuals with multiple sclerosis, say researchers at the ... Chicago, Ill. "Angioplastythe nonsurgical procedure of threading a ...
... March 28, 2011 University of Utah scientists used ... and toadfish inner-ear cells send signals to the brain. ... and lead to devices to restore vision, maintain balance ... to talk to the brain with optical infrared pulses ...
... JOLLA, CA Over the last years, two teams of ... model of how a powerful DNA repair complex works. Now, ... molecular motor inside the complex functions findings they say ... to cystic fibrosis. In a paper published in an ...
Cached Biology News:Interventional radiologists advance MS research: Vein-opening treatment safe 2Interventional radiologists advance MS research: Vein-opening treatment safe 3Interventional radiologists advance MS research: Vein-opening treatment safe 4Will we hear the light? 2Will we hear the light? 3Will we hear the light? 4Will we hear the light? 5Structure of DNA repair complex reveals workings of powerful cell motor 2Structure of DNA repair complex reveals workings of powerful cell motor 3Structure of DNA repair complex reveals workings of powerful cell motor 4
... These handy dispensers save space and ... and other garb. They are the ... parts used in labs, processing and ... charges and the particles they attract. ...
... These handy dispensers save space and ... and other garb. They are the ... parts used in labs, processing and ... charges and the particles they attract. ...
... that it uses a deep-UV deuterium bulb, which ... with a shutter (controlled via a TTL signal ... Source produces a powerful, stable output from 215-400 ... source are available, providing a wavelength range of ...
... and mitochondrial membrane potential. The mitochondrial permeability ... the initiation of cellular apoptosis. This process ... the electrochemical gradient across the mitochondrial membrane, ... membrane potential (YD). Loss of mitochondrial YD ...
Biology Products: