Noble metal nanostructures are well-known for their ability to support localized surface plasmons, which lead to enhanced electromagnetic fields at the nanoparticle surface that are the basis for surface-enhanced spectroscopies, such as surface-enhanced Raman scattering (SERS).  However, understanding the spectral coupling between molecular analytes and plasmonic nanostructures is complicated by the diffraction-limit of light, which prevents objects that are smaller than roughly half the wavelength of light from being resolved.  This talk will describe using super-resolution SERS imaging to understand the coupling between single molecule analytes and plasmonic nanoparticles.  Using the techniques we have developed, we are able to follow electrochemical reactions on the surface of plasmonic nanoparticle electrodes in real time and map out site-specific redox potentials on the nanoparticle electrode surface.

Super-resolution surface-enhanced Raman scattering (SERS) imaging for monitoring electrochemical reactions on plasmonic nanoparticle electrodes

248th National Meeting (2014)

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