OSE Seminars
The convergence of nanoptics and chemistry: plasmons enabling surface chemistry and in situ detections
Presented by Professor Terefe Habteyes, UNM Department of Chemistry and Chemical Biology
It is now well established that excitation of localized surface plasmon resonances (LSPR) in coupled (aggregated) nanoparticles (NPs) of noble metals (gold or silver) enhances the Raman scattering of molecules adsorbed on the NPs dramatically to the extent that the scattering of a single molecule can be detected. Recent studies also show that the adsorbed molecules can undergo chemical transformation due to metal to molecule charge transfer. This dual effect of LSPRs provides convenient platform to investigate plasmon enhanced surface catalytic reactions by monitoring the chemical changes in situ. In this presentation, after brief overview of Raman spectroscopy, the motivation for surface enhanced Raman spectroscopy (SERS) will be discussed, and super-resolved near-field images of fundamental plasmon modes that are responsible for SERS will be presented. Finally, the application of SERS for monitoring charge transfer in metal-adsorbate systems will be discussed based on our very recent interesting observations on model organic molecules. The presentation is organized such that graduate and undergraduate students of optics, chemistry, physics and engineering with no prior knowledge of SERS, LSPR, etc can follow through.
11:00 am, Thursday, September 8, 2016
Room 103, Center for High Tech Materials
Science and Technology Park - South Campus
Individuals with disabilities who need an auxiliary aid or service to attend or participate in P&A events should contact the Physics Department (phone: 505-277-2616, email: physics@unm.edu) well in advance to ensure your needs are accomodated. Event handouts can be provided in alternative accessible formats upon request. Please contact the Physics front office if you need written information in an alternative format.
A schedule of talks within the Department of Physics and Astronomy is available on the P&A web site at http://physics.unm.edu/pandaweb/events/index.php