COLL 73 |
| Christy L. Haynes, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 and Richard P. Van Duyne, Department of Chemistry, Northwestern, 2145 Sheridan Road, Evanston, IL 60208-3113. |
| Surprisingly, in the 25 years since the discovery of surface-enhanced Raman spectroscopy (SERS), there has never been a detailed comparison of the localized surface plasmon resonance (LSPR) spectra of highly ordered, structurally well-defined, nanoparticle surfaces and the surface-enhanced Raman excitation spectra (SERES) even though they are intimately linked through the electromagnetic enhancement mechanism. The innovative approach to SERES detailed herein describes a method, plasmon scanned-SERES (PS-SERES), that yields information rich SERE spectra using readily available instrumentation. The PS-SERE spectra reported here have been performed under ambient conditions using irreversibly bound adsorbates and nanoparticle surfaces fabricated by nanosphere lithography. Previous work has demonstrated that these nanoparticle surfaces have LSPRs that are extremely sensitive to their size and shape and are spectrally narrow (viz., < 100 nm). In the PS-SERES experiment, the LSPR and SERS measurements are both spatially resolved and spatially correlated using far-field optical microscopy. |
|
Electrochemistry and Surface Science Symposium in Memory of Mike Weaver
Division of Colloid and Surface Chemistry |