Surface-enhanced femtosecond stimulated Raman spectroscopy (SE-FSRS) is a promising technique that can be used to study the ultrafast dynamics of molecular systems with high sensitivity, temporal resolution, and spectral resolution. SE-FSRS however, has been mostly limited to proof of principle experiments due to a lack of adequate plasmonic substrates. Thus far, SE-FSRS experiments have been performed on commercially available, highly-enhancing SERS substrates containing gold nanoparticle aggregates encased in a protective silica shell. We present a simple aggregation/stabilization procedure for the formation of gold nanoantennas from gold monomers with tunable plasmonic properties. Besides SE-FSRS, these nanoantenna substrates are ideal for a variety of new spontaneous SERS experiments. Examples of two-color SERS to detect plasmon driven chemistry will be presented.

Gold nanoparticle oligomers for surface-enhanced femtosecond stimulated Raman spectroscopy

254th National Meeting (2017)

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