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Super-resolving SERS hot spots
Super-resolving SERS hot spots
The Willets lab was the first to resolve single molecule SERS hot spots using super-resolution imaging, monitoring the SERS intensity as the molecule explored the nanoparticle surface.
Over the years, we have used SERS to understand how electromagentic fields are enhanced at nanoparticle surfaces, shown how SERS emission patterns can be used as diagnostics for nanoparticle aggregation, and studied electrochemical reactions at nanoparticle electrodes.
See below for some of our publications in this area.
Related publications
Related publications
K.A. Willets. “Super-resolution surface-enhanced Raman scattering: perspectives on the past, present and future.” ACS Nano. 18, 27824 (2024).
L.M. Liz-Marzán [and 58 others, including K.A. Willets]. “Present and Future of Surface Enhanced Raman Scattering.” Invited Perspective. ACS Nano. 14, 28 (2020).
K.A. Willets. “Probing nanoscale interfaces with electrochemical surface-enhanced Raman scattering.” Curr. Opin. Electrochem. 13, 18 (2019).
S. Zaleski, M.F. Cardinal, D. Chulhai, A.J Wilson, K.A. Willets, L. Jensen, R.P. Van Duyne. “Towards Monitoring Electrochemical Reactions with Dual-wavelength SERS: Characterization of R6G Neutral Radical Species and Covalent Tethering of R6G to Silver Nanoparticles.” J. Phys. Chem. C. 120, 24982 (2016).
A.J. Wilson and K.A. Willets. “Unforeseen distance-dependent SERS spectro-electrochemistry from surface-tethered Nile Blue: the role of molecular orientation.” Analyst. 141, 5144 (2016).
A.J. Wilson, N.Y. Molina, K.A. Willets. “Modification of the electrochemical properties of Nile Blue through covalent attachment to gold as revealed by electrochemistry and SERS.” J. Phys. Chem. C. 120, 21091 (2016).
M.L. Weber, A.J. Wilson, K.A. Willets. “Characterizing the spatial dependence of redox chemistry on plasmonic nanoparticle electrodes using correlated super-resolution surface-enhanced Raman scattering imaging and electron microscopy.” J. Phys. Chem. C. 119, 18591 (2015).
A.J. Wilson and K.A. Willets. “Visualizing site-specific redox potentials on the surface of plasmonic nanoparticles with super-localization SERS microscopy.” Nano Lett. 14, 939-945 (2014).
K.A. Willets. “Super-resolution imaging of SERS hot spots.” Invited tutorial review, Chem. Soc. Rev. 43, 3854-3864 (2014).
E.J. Titus and K.A. Willets. “Super-localization surface-enhanced Raman scattering microscopy: comparing point spread function models in the ensemble and single molecule limits.” ACS Nano. 7, 8284-8294 (2013).
K.A. Willets. “New tools for investigating electromagnetic hot spots in single-molecule SERS,” Invited review, ChemPhysChem. 14, 3186-3195 (2013).
E.J. Titus, M.L. Weber, S.M. Stranahan, K.A. Willets. “Super-resolution SERS imaging beyond the single-molecule limit: an isotope-edited approach.” Nano Lett. 12, 5103-5110 (2012).
K.A. Willets, S.M. Stranahan, M.L. Weber. “Shedding light on surface-enhanced Raman scattering hot spots through single molecule super-resolution imaging.” J. Phys. Chem. Lett. 3, 1286-1294 (2012).
S.M. Stranahan, E.J. Titus, K.A. Willets. “Discriminating nanoparticle dimers from higher order aggregates through wavelength-dependent SERS orientational imaging.” ACS Nano. 6, 1806-1813 (2012).
M.L. Weber, J.P. Litz, D.J. Masiello, K.A. Willets. “Super-resolution imaging reveals a difference between SERS and luminescence centroids.” ACS Nano. 6, 1839-1848 (2012).
S.M. Stranahan, E.J. Titus, K.A. Willets. “SERS orientational imaging of silver nanoparticle dimers.” J. Phys. Chem. Lett. 2, 2711–2715 (2011).
M.L. Weber, K.A. Willets. “Correlated super-resolution optical and structural studies of surface-enhanced Raman scattering hot spots in silver colloid aggregates.” J. Phys. Chem. Lett. 2, 1766-1770 (2011).
S. M. Stranahan, K.A. Willets. “Super-resolution optical imaging of single-molecule SERS hot spots,” Nano Lett. 10, 3777-3784 (2010).
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