Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > DARPA awards research team $1.2M grant to study surface enhanced Raman scattering

Abstract:
The Defense Advanced Research Projects Agency (DARPA) has awarded a $1.2 million grant to an interdisciplinary team of Harvard University researchers to study surface enhanced Raman scattering (SERS) for the first phase of a potential three-year effort.

DARPA awards research team $1.2M grant to study surface enhanced Raman scattering

Cambridge, MA | Posted on July 17th, 2008

If all phases of the development program are completed, researchers could receive up a total of up to $2.9 million in funding.

Ken Crozier, Assistant Professor of Electrical Engineering at the School of Engineering and Applied Sciences (SEAS) will serve as the principal investigator for the grant. His co-investigators include Eric Mazur, Balkanski Professor of Physics and Applied Physics at SEAS and the Department of Physics and Alán Aspuru-Guzik, Assistant Professor of Chemistry and Chemical Biology at the Department of Chemistry and Chemical Biology.

SERS relies upon a fundamental phenomenon in physics called the Raman effect—the change in the frequency of monochromatic light (such as a laser) when it passes through a substance. Properly harnessed, Raman scattering can identify specific molecules by detecting their characteristic spectral fingerprints. Potential applications of SERS include the sensing and identification of a range of materials, including chemical and biological agents, improvised explosive devices, and toxic industrial waste.

"While SERS offers enormous potential for chemical detection and sensing, its practical use has been hampered by the need for improved knowledge of the fundamentals of the enhancement mechanisms," says Crozier.

It turns out that Raman scattering cross sections are very small, about 1012-1014 times smaller than fluorescence cross sections. In the 1970's scientists discovered that by placing molecules on roughened metal surfaces they could achieve significantly larger Raman signals, enabling the detection of molecules. Nevertheless the gain has not been enough to make SERS readily usable in detection devices.

"By applying recent advances in optical antennas, laser nanostructuring, and theoretical chemistry, we aim to elucidate the fundamental mechanisms underlying SERS and demonstrate high-performance SERS substrates that will enable the technology to go to the next stage of development," says Crozier.

In particular, the team will utilize Crozier's recent work on optical antennas, metallic nanostructures that are able to generate intense electric fields, by modelling, fabricating and characterizing SERS optical antenna chips. SERS measurements on these chips will allow precise determination of the effects of optical antenna parameters, such as size, shape and spacing requirements, on SERS enhancement.

Likewise, to fabricate large area SERS substrates, the researchers will employ Mazur's expertise in femtosecond laser-nanostructured (FSLN) semiconductor surfaces, or what is more commonly known as "black silicon." Because not all metallic nanoparticles are equally SERS-active, they will also create a screening process to separate the two.

Finally, by relying on Aspuru-Guzik's expertise in theoretical modeling the team will investigate the interplay between chemical and electromagnetic enhancement and, based upon their findings, develop an integrated electronic structure package in a complex electromagnetic environment.

To help foster the research, Crozier plans to collaborate with two existing Harvard-based centers, the Nanoscale Science and Engineering Center and the Center for Nanoscale Systems, a member of the National Nanotechnology Infrastructure Network.

####

For more information, please click here

Contacts:
Michael Patrick Rutter

617-496-3815

Copyright © Harvard University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Govt.-Legislation/Regulation/Funding/Policy

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Announcements

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

Military

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Nanograft seeded with 3 cell types promotes blood vessel formation to speed wound healing April 27th, 2016

The light stuff: A brand-new way to produce electron spin currents - Colorado State University physicists are the first to demonstrate using non-polarized light to produce a spin voltage in a metal April 26th, 2016

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Brookhaven's Oleg Gang Named a Battelle 'Inventor of the Year': Recognized for work using DNA to guide and regulate the self-assembly of nanoparticles into clusters and arrays with controllable properties April 25th, 2016

Zip software can detect the quantum-classical boundary: Compression of experimental data reveals the presence of quantum correlations April 21st, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic