Navigation Links
From lectures to explosives detection: Laser pointer identifies dangerous chemicals in real-time
Date:10/25/2012

WASHINGTON, Oct. 9, 2012By using an ordinary green laser pointer, the kind commonly found in offices and college lecture halls, an Israeli research team has developed a new and highly portable Raman spectrometer that can detect extremely minute traces of hazardous chemicals in real time. The new sensor's compact design makes it an excellent candidate for rapid field deployment to disaster zones and areas with security concerns. The researchers will present their findings at Laser Science XXVIIIthe American Physical Society Division of Laser Science's Annual Meetingcollocated with the Optical Society's (OSA) Annual Meeting, Frontier in Optics (FiO), taking place in Rochester, N.Y. next week.

Raman spectrometers rely on highly focused beams of light at precise wavelengths to illuminate small samples of materials. Very sensitive detectors then study the spectra of light that has been re-emitted, or scattered, by the sample. Most of this scattered light retains its original frequency or color, but a very small percentage of that light is shifted ever so slightly to higher or lower wavelengths, depending on the unique vibrational modes of the sample being studied. By comparing the shifted and the original wavelengths, it's possible to determine the precise chemicals present in the sample.

The researchers brought this capability down to size by constructing their Raman spectrometer using a low-power and low-cost commercial green laser pointer. The green laser's relatively short wavelength helped to improve the detection of the inherently weak Raman signal. The spectrometer also has the capability to first scan the entire sample optically, sweeping from side to side, to locate individual particles of interest a task usually performed by large and cumbersome Raman microscopes.

"Since the overall system is modular, compact, and can be readily made portable, it can be easily applied to the detection of different compounds and for forensic examination of objects that are contaminated with drugs, explosives, and particularly explosive residues on latent fingerprints," said Ilana Bar, a researcher with the Department of Physics at Ben-Gurion University of the Negev in Israel. "With proper investment this system could be deployed quite quickly as a consumer product." Other members of the research team include Itamar Malka, Alona Petrushansky, and Salman Rosenwaks.

Presentation LTh3I.3, "Detection of Explosives and Latent Fingerprint Residues Utilizing Laser Pointer Based Raman Spectroscopy," takes place Thursday, Oct. 18 at 2:30 p.m. EDT at the Rochester Riverside Convention Center in Rochester, N.Y.


'/>"/>
Contact: Angela Stark
astark@osa.org
202-416-1443
Optical Society of America
Source:Eurekalert  

Related biology technology :

1. Graphene foam detects explosives, emissions better than todays gas sensors
2. Eye Surgery Center of Michigan First in Southeast Michigan to Perform Bladeless Cataract Surgery Using New LenSx® Laser Technology
3. New method for enhancing thermal conductivity could cool computer chips, lasers and other devices
4. Research could improve laser-manufacturing technique
5. Cooling semiconductor by laser light
6. New laser can point the way to new energy harvesting
7. Metamaterials may advance with new femtosecond laser technique
8. UCSB Physicists mix 2 lasers to create light at many frequencies
9. CU-Boulder physicists use ultrafast lasers to create first tabletop X-ray device
10. JPSA Introduces Picosecond Laser Micromachining System
11. Calmar Laser Growth Reinforced by ISO 9001:2008 Certification
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
From lectures to explosives detection: Laser pointer identifies dangerous chemicals in real-time
(Date:4/29/2016)... April 29, 2016 According ... Market Research "Separation Systems for Commercial Biotechnology Market ... and Forecast 2015 - 2023", the separation systems ... 10,665.5 Mn in 2014 and is projected to ... to 2023 to reach US$ 19,227.8 Mn in ...
(Date:4/28/2016)... 2016 The report "Cryocooler Market ... Service (Technical Support, Product Repairs & Refurbishment, Preventive Maintenance, ... to 2022", published by MarketsandMarkets, the global market is ... at a CAGR of 7.29% between 2016 and 2022. ... 94 Figures spread through 159 Pages and in-depth TOC ...
(Date:4/28/2016)... ... 28, 2016 , ... Morris Midwest ( http://www.morrismidwest.com ), a ... at its Maple Grove, Minnesota technical center, May 11-12. The event will ... Almost 20 leading suppliers of tooling, accessories, software and other related technology will ...
(Date:4/27/2016)... VANCOUVER, British Columbia , April 27, 2016 ... "Gesellschaft" oder "NanoStruck") (CSE: NSK) (OTCPink: NSKQB) ( ... sie im Anschluss an ihre Pressemitteilung vom 13. ... Inc. erhalten hat, ihre Finanzen um zusätzliche 200.000.000 ... auf 4.000.000 Kanadische Dollar zu bringen. Davon wurden ...
Breaking Biology Technology:
(Date:3/15/2016)... March 15, 2016 Yissum Research Development ... technology-transfer company of the Hebrew University, announced today the ... sensing technology of various human biological indicators. Neteera Technologies ... million from private investors. ... the detection of electromagnetic emissions from sweat ducts, enables ...
(Date:3/10/2016)... India , March 10, 2016 ... a new market research report "Identity and Access Management ... & Audit, Compliance, and Governance), by Organization Size, by ... to 2020", published by MarketsandMarkets, The market is estimated ... USD 12.78 Billion by 2020, at a Compound Annual ...
(Date:3/8/2016)... RALEIGH, N.C. , March 8, 2016 /PRNewswire/ ... biometric sensor technology, today announced it has secured ... led by GII Tech, a new venture fund ... LLC, with additional participation from existing investors TDF ... use the funds to continue its triple-digit growth ...
Breaking Biology News(10 mins):