Search Menu
Photonics Media Photonics Marketplace Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

Raman Scattering Measures Single-Molecule Vibrations

Facebook Twitter LinkedIn Email Comments
IRVINE, Calif., Aug. 21, 2014 — Measurement of the vibrations, or “breathing,” of single molecules is now possible using Raman spectroscopy techniques.

A team from the University of California, Irvine, viewed a bipyridylethylene (BPE) molecule vibrating via time-resolved coherent anti-Stokes Raman scattering (CARS). Two 90-nm gold plasmonic nanoantennas amplified radiation reflected from the single molecule to a detectable level.

“Detecting one molecule through scattering of light is extremely difficult, which is why we needed to amplify the signal,” said Dr. Eero Hulkko, a visiting researcher from the Academy of Finland.

Nanoparticle amplification of molecular signals is employed in various spectroscopic techniques, such as surface-enhanced Raman scattering (SERS). Combining the ability of SERS to detect single molecules with the extreme time resolution of time-resolved CARS enabled observation of the single molecule vibrations, the researchers said.

“Observing the breathing of a single molecule takes us one step closer to seeing real chemistry at work at the level of a single molecule,” said UCI professor Dr. Vartkess A. Apkarian.

The research was published in Nature Photonics (doi: 10.1038/nphoton.2014.143).
Aug 2014
AmericasCARSIrvineResearch & TechnologySERSspectroscopyUniversity of CaliforniaEero HulkkoVartkess A. Apkarian

view all
Search more than 4000 manufacturers and suppliers of photonics products and services worldwide:

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2021 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x We deliver – right to your inbox. Subscribe FREE to our newsletters.
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.