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:2/20/2017)... analyzes the worldwide markets for Bioinformatics in US$ by the following ... for the US, Canada , Japan ... , Latin America , and Rest of World. ... ... forecasts are provided for the period 2015 through 2022. Also, a ...
(Date:2/20/2017)... Orlando FL (PRWEB) , ... ... ... Inc., the leading US Joint Commission Accredited venture-backed teleradiology and telemedicine company ... with Siemens Healthineers. USARAD services are planned to be offered via a ...
(Date:2/20/2017)... ORLANDO, Fla. , Feb. 20, 2017 /PRNewswire/ ... (HIMSS) conference in Orlando , ... new offerings, collaborators and clients. IBM Chairman, President ... the HIMSS17 opening keynote address today from 8:30-10 ... www.ibm.com/watson/health , and ibm.com/industries/healthcare. Her remarks examine ...
(Date:2/18/2017)... ... February 17, 2017 , ... ... (ASBMT) and the Center for International Blood & Marrow Transplant Research (CIBMTR) will ... Fla. , The combined scientific sessions offer investigators, clinicians, laboratory technicians, ...
Breaking Biology Technology:
(Date:2/16/2017)... , Feb. 16, 2017  Genos, a ... announced that it has received Laboratory Accreditation from ... Accreditation is presented to laboratories that meet stringent ... demonstrate scientifically rigorous processes. "Genos is ... in laboratory practices. We,re honored to be receiving ...
(Date:2/9/2017)... Feb. 9, 2017 The biomass boiler market ... the biomass boiler market globally in terms of revenue ... boilers. The market for biomass boilers has been segmented ... application, and country/region. The market based on feedstock type, ... residues, biogas & energy crops, urban residues, and others. ...
(Date:2/8/2017)... Report Highlights The global biosurgery market should ... 2016 at a compound annual growth rate (CAGR) of ... An overview of the global market for biosurgery. - ... and 2016, and projections of compound annual growth rates ... the basis of product type, source, application, and region. ...
Breaking Biology News(10 mins):