Surface-Enhanced Raman Microspectroscopy at Electrode Surfaces

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Abstract:

Surface-enhanced Raman microspectroscopy has been developed as a technique for characterizing processes occurring at the electrode/electrolyte interface. A spectroelectrochemical cell was designed to obtain Raman spectra of electrochemical species with the use of microscope optics, which allowed unambiguous placement of the laser focus at the electrode surface with spatial resolution on the order of 1 μm. It was also possible to visually inspect the surface morphology of the electrode with the use of the Raman microscope in the reflected-light mode. The capabilities of the spectroelectrochemical cell were demonstrated by observation of surface-enhanced Raman scattering (SERS) for a variety of model systems (pyridine, pyridinium ion, potassium cyanide) with the use of silver, copper, and nickel electrodes. The electrochemical behavior of a commercially important gold electroplating process is also reported.

Keywords: Gold electroplating; Raman; Raman microspectroscopy; SERS; Spectroelectrochemistry; Surface-enhanced Raman scattering

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370287774986787

Affiliations: Plant Laboratory, Product Certification Division, Oak Ridge Y-12 Plant, Martin Marietta Energy Systems, Inc., Oak Ridge, Tennessee 37831

Publication date: February 1, 1987

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