Ultrafast Plasmonic Reaction Dynamics

Left: First demonstration of surface enhanced femtosecond stimulated Raman spectroscopy (SE-FSRS). Center: Colloidal gold nanoparticle substrate. Right: Investigating the effects of the molecule-plasmon coupling on the vibrational coherence dephasing time

 


We are pushing for chemical knowledge at the space-time limit. By combining ultrafast spectroscopic techniques with plasmonic nanomaterials we work towards examining chemical reaction dynamics on the femtosecond time scale and nanometer length scale. Our initial work involved developing a new technique called surface-enhanced femtosecond stimulated Raman spectroscopy (SE-FSRS). With this new surface-enhanced technique, we can probe the time evolution of reacting molecular species with time resolution on the order of 10-100 femtoseconds, spectral resolution of 5-20 cm-1, and enhancement factors of up to 10 6. With this new technique we plan to examine important photon enabled chemical processes including photocatalysis and photoinduced electron transfer.

In addition to the SE-FSRS studies, we are setting up a second ultrafast laser system to expand our study of ultrafast surface-enhanced spectroscopies to shorter pulses and broader spectral ranges as well as synthesizing a range of nanostructured substrates for SE-FSRS experiments. These ultrafast studies will be carried out in partial collaboration with the CaSTL Center at the University of California – Irvine. For more information, please visit the center’s website here.

Fernanda Cardinal, postdoctoral fellow
Yinsheng Guo, postdoctoral fellow
Michael McAnally, 5th year graduate student joint with George Schatz
Emily Sprague, 5th year graduate student joint with Tamar Seideman
Tyler Ueltschi, 2nd year graduate student
Hannah Mayhew, 3rd year graduate student

Recent Publications:

Frontiera, R. R., Henry, A.-I., Gruenke, N. L., Van Duyne, R. P., “Surface Enhanced Femtosecond Stimulated Raman Spectroscopy”. Journal of Physical Chemistry Letters, 2, 10, 1199-1203, 2011.

Frontiera, R. R.; Gruenke, N. L.; Van Duyne, R. P., “Fano-Like Resonances Arising from Long-Lived Molecule-Plasmon Interactions in Colloidal Nanoantennas”. Nano Letters 2012, 12 (11), 5989-5994.

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  • Professor Richard Van Duyne

    Additional Information

    Discoverer of Surface-enhanced Raman Spectroscopy (1977)
    Inventor of Nanosphere Lithography (1995) & Localized Surface Plasmon Resonance Spectroscopy (2000)

  • Group Members

    Professor Van Duyne has, in his career to date, advised a total of 87 graduate students and 47 postdoctoral fellows. Every year, Professor Van Duyne gives a talk to introduce new graduate students to our research. The 2017 seminar slides are available here.

  • News

    Professor Van Duyne was recently named a Vannevar Bush Faculty Fellow by the U.S. Department of Defense to conduct "high risk, high payoff" basic scientific research. Read more here