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Chemistry Seminar, 'Application of STEM/EELS to Optical Plasmons and Surface Enhanced Nonlinear Spectroscopy'

Thursday, 29 August, 2013

Speaker: Dr. Jon Camden, University of Tennessee- Knoxville

Title: "Application of STEM/EELS to Optical Plasmons and Surface Enhanced Nonlinear Spectroscopy"


The last decade has seen an explosion in the study of plasmonic materials, with current applications including surface-enhanced spectroscopy, imaging beyond the diffraction limit, solar energy harvesting, and ultrasensitive detection.  Our group has been working to characterize the near-field enhancements encountered upon excitation of the localized surface plasmon resonance. Recently, electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope (STEM) has emerged as a technique capable of mapping the energy and spatial distribution of localized surface plasmon modes in nanostructures. Several applications of STEM/EELS to optically driven plasmonic applications are presented.

The intersection of higher-order spectroscopies with the emerging field of plasmonics is an unexplored frontier; therefore, in a parallel effort we are exploring the ability of plasmonic nanostructures to drive nonlinear spectroscopies, such as hyper-Raman.  Surface enhanced hyper-Raman scattering (SEHRS) demonstrates the ability to probe single molecules. It further provides a method to probe the properties of nonlinear chromophores. Such studies have highlighted the importance of non-Condon scattering and suggest new ways to optimize the nonlinear properties of molecules.




This seminar will not be web cast.




Buehler Hall
Room 555
1420 Circle Drive
Knoxville, TN 37996

Event Contact

Pam Roach

Phone: 865-974-3260

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