Publications

V. Sundaresan, A.R. Cutri, J. Metro, C. Madukoma, J.D. Shrout, A.J. Hoffman, K.A. Willets, P.W. Bohn.  “Potential Dependent Spectroelectrochemistry of Electrofluorogenic Dyes on Indium-Tin Oxide.”  Accepted (2021).
S.A. Hosseini Jebeli, C. West, S.A. Lee, H.J. Goldwyn, C.R. Bilchak, Z. Fakhraai, K.A. Willets, S. Link, D.J. Masiello.  “Wavelength-Dependent Photothermal Imaging Probes Nanoscale Temperature Differences among Subdiffraction Coupled Plasmonic Nanorods.”  Nano Lett. 21, 5386 (2021).
E. Cortés, A.O. Govorov, H. Misawa, K.A. Willets.  “Special Topic on Emerging Directions in Plasmonics.”  J. Chem. Phys.  153, 010401 (2020).
J. Langer, L.M. Liz-Marzán [and 57 others, including K.A. Willets].  “Present and Future of Surface Enhanced Raman Scattering.”  Invited Perspective.  ACS Nano.  14, 28 (2020).
U. Bhattacharjee, C. West, S.A. Hosseini Jebeli, H.J. Goldwyn, X-T Kong, Z. Hu, E.K. Beutler, W-S Chang, K.A. Willets, S. Link, D.J. Masiello.  “Active far-field control of the thermal near-field via plasmon hybridization.” ACS Nano. 13, 9655 (2019).
K.A. Willets.  “Supercharging super-localization microscopy: how electrochemical charging of plasmonic nanostructures uncovers hidden heterogeneity.”  Invited Perspective.  ACS Nano.  13, 6145 (2019).
Z. Zhang, Y. Yu, Y. Tang, Y-S. Guan, J. Yin, K.A. Willets, S. Ren.  “Kirigami-inspired stretchable conjugated electronics.”  Advanced Electronic Materials.  DOI: 10.1002/aelm.201900929 (2019).
X. Cheng, T.P. Anthony, C.A. West, Z. Hu, V. Sundaresan, A.J. McLeod, D.J. Masiello, K.A. Willets.  “Plasmon heating promotes ligand reorganization on single gold nanorods."   J. Phys. Chem. Lett. 10, 1394 (2019).
Y. Yu, K. Wijesekara, X.X. Xi, K.A. Willets.  “Quantifying Wavelength-Dependent Plasmonic Hot Carrier Energy Distributions at Metal/Semiconductor Interfaces.”  ACS Nano.  13, 3629 (2019).
K.A. Willets and K.Mayer.  “Surface-enhanced Raman scattering (SERS) as a characterization method for metal-organic interactions.”  Invited book chapter.  Handbook of organic materials for electronic and photonic devices.  Second edition.  (Ed. Oksana Ostroverkhova) Woodhead Publishing, Cambridge, UK. 2019.
K.A. Willets.  “Probing nanoscale interfaces with electrochemical surface-enhanced Raman scattering.”  Curr. Opin. Electrochem.  13, 18 (2019).
E.M. Samples, J.M. Schuck, P.B. Joshi, K.A. Willets, G.E. Dobereiner.  “Synthesis and Properties of N-arylpyrrole-functionalized poly(1-hexene-alt-CO).” Macromolecules.  51, 9323 (2018).
V. Sundaresan, J.W. Monaghan, K.A. Willets.  "Monitoring Simultaneous Electrochemical Reactions with Single Particle Imaging."  Invited contribution to a Special Issue on Single Entity Electrochemistry.  ChemElectroChem.  5, 3052 (2018).
Y. Yu, J.D. Williams, K.A. Willets.  “Quantifying Photothermal Heating at Plasmonic Nanoparticles by Scanning Electrochemical Microscopy.”  Faraday Discussions.  210, 29 (2018).
Y. Yu, V. Sundaresan, K.A. Willets.  “Hot Carriers vs. Thermal Effects: Resolving the Enhancement Mechanisms for Plasmon-Mediated Photoelectrochemical Reactions.”  J. Phys. Chem. C.  122, 5040 (2018).
V. Sundaresan, J.W. Monaghan, K.A. Willets.  "Visualizing the Effect of Partial Oxide Formation on Single Silver Nanoparticle Electrodissolution."   J. Phys. Chem. C.  122, 3138 (2018).  Selected as ACS Editors' Choice.
Y. Yu, V. Sundaresan, S. Bandyopadhyay, Y. Zhang, M.A. Edwards, K. McKelvey, H.S. White, K.A. Willets.  “Three-Dimensional Super-Resolution Imaging of Single Nanoparticles Delivered by Pipettes.”  ACS Nano.  11, 10529 (2017).
P.B. Joshi, T.P. Anthony, A.J. Wilson, K.A. Willets.  “Imaging out-of-plane polarized emission patterns on gap mode SERS substrates: from high molecular coverage to the single molecule regime.”  Faraday Discussions.  205, 245 (2017).
K.A. Willets and J.S. Biteen.  “Introduction: Super-resolution and single molecule imaging.” Chem. Rev. 117, 7241 (2017).
V. Sundaresan, K. Marchuk, Y. Yu, E.J. Titus, A.J. Wilson, C.M. Armstrong, B. Zhang, K.A. Willets.  “Visualizing and Calculating Tip-Substrate Distance in Nanoscale Scanning Electrochemical Microscopy Using 3-Dimensional Super-Resolution Optical Imaging.”   Analytical Chemistry. 89, 922 (2017).
K.A. Willets, A.J. Wilson, V. Sundaresan, P.B. Joshi. “Super-resolution imaging and plasmonics.” Chemical Reviews. 117, 7538 (2017).
C.L. Haynes, R.R. Frontiera, K.A. Willets.  “Preface of Richard P. Van Duyne Festschrift.” J. Phys. Chem C. 120, 20483 (2016).
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).
S. Zaleski, A.J. Wilson, M. Mattei, X. Chen, G. Goubert, M.F. Cardinal, K.A. Willets, R.P. Van Duyne.  “Investigating nanoscale electrochemistry with surface- and tip-enhanced Raman spectroscopy.”  Accounts of Chemical Research.  49, 2023 (2016).
A.J. Wilson and K.A. Willets.  “Unforeseen distance-dependent SERS spectroelectrochemistry from surface-tethered Nile Blue: the role of molecular orientation.” Invited contribution to special themed issue on SERS. 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).
B. Xu, H. Li, H. Li, A.J. Wilson, L. Zhang, K. Chen, K.A. Willets, F. Ren, J. Grossman, S. Ren.  “Chemically driven interfacial coupling in charge-transfer mediated functional superstructures.”  Nano Letters.  16, 2851 (2016).
B. Xu, Z. Luo, W. Gao, A.J. Wilson, C. He, X. Chen, G. Yuan, H.L. Dai, Y. Rao, K.A. Willets, Z. Dauter, S. Ren.  “Solution-processed molecular opto-ferroic crystals.”  Chemistry of Materials.  28, 2441 (2016).
B. Xu, Z. Luo, A.J. Wilson, K. Chen, W. Gao, G. Yuan, H.D. Chopra, X. Chen, K.A. Willets, Z. Dauter, S. Ren. “Multifunctional charge-transfer single crystals through supramolecular assembly."  Advanced Materials.  28, 5322 (2016).  
A.J. Wilson and K.A. Willets.  "Molecular Plasmonics."  Invited review.  Annu. Rev. Anal. Chem. 9, 27 (2016).
K. L. Blythe and K.A. Willets.  “Super-resolution imaging of fluorophore-labeled DNA bound to gold nanoparticles: a single molecule, single particle approach.”  Invited feature article.  J. Phys. Chem. C.  120, 803 (2016).  Journal covert art.
K.L. Blythe, E.J. Titus, K.A. Willets. “The effects of tuning fluorophore density, identity, and spacing on reconstructed images in super-resolution imaging of fluorophore-labeled gold nanorods.” J. Phys. Chem. C. 119, 28099 (2015).
A.J. Wilson, K. Marchuk, K.A. Willets.  “Imaging electrogenerated chemiluminescence at single gold nanowire electrodes.”  Nano Lett. 15, 6100 (2015).
E.J. Titus, K.L. Blythe, K.A. Willets.  “Monte Carlo simulations of triplet-state photophysics for super-resolution imaging of fluorophore-labeled gold nanorods.” Proc. SPIE  9554, 955403-1 (2015).
K.L. Blythe, E.J. Titus, K.A. Willets.  “Comparing the accuracy of reconstructed image size in super-resolution imaging of fluorophore-labeled gold nanorods using different fit models.”  J. Phys. Chem. C. 119, 19333 (2015).
M.L. Weber, A.J. Wilson, K.A. Willets.  “Characterizing the spatial dependence of redox chemistry on plasmonic nanoparticle electrodes using correlated super-resolution SERS imaging and electron microscopy.”  J. Phys. Chem. C. 119, 18591 (2015).
K.A. Willets and M.L. Weber. "Super-resolution imaging of surface-enhanced Raman scattering hot spots under electrochemical control.” Proc. SPIE 9467, 946710 (2015).
K.L. Blythe, E.J. Titus, and K.A. Willets. “Objective-induced point spread function aberrations and their impact on super-resolution microscopy.” Anal. Chem. 87 (12), 6419-6424 (2015).
C. Renault, K. Marchuk, H.S. Ahn, E.J. Titus, J. Kim, K.A. Willets, A.J. Bard.  “Observation of nanometer-sized electro-active defects in insulating layers by fluorescence microscopy and electrochemistry.”  Anal Chem. 87 (11), 5730-5737 (2015).
K. Marchuk and K.A. Willets. “Localized surface plasmons and hot electrons.” Chemical Physics. Invited Perspective. 2014. 445, 95-104 (2014).
A.L. Weisman, K.H. DuBay, K.A. Willets, R.A. Friesner. “A First-Principles Polarized Raman Method for Determining Whether a Uniform Region of a Sample is Crystalline or Isotropic.” J. Chem. Phys. 141, 224702 (2014).
K.A. Willets. “Super-resolution imaging of SERS hot spots.”  Invited tutorial review, Chem. Soc. Rev., 43(11), 3854-3864 (2014).
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.L. Blythe, E.J. Titus and K.A. Willets.  “Triplet-state mediated super-resolution imaging of fluorophore-labeled gold nanorods.” ChemPhysChem (Invited contribution to special themed issue on super-resolution imaging and nanophotonics), 15, 784-793 (2014).
K.A. Willets.  “Plasmon point spread functions: how do we model plasmon-mediated emission processes?” Invited perspective, Frontiers of Physics, 9, 3-16 (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).
E.J. Titus and K.A. Willets.  “Accuracy of super-localization imaging using Gaussian and dipole emission point-spread functions for modeling gold nanorod luminescence.”  ACS Nano, 7, 6258-6267 (2013).
K.A. Willets.  “New tools for investigating electromagnetic hot spots in single-molecule surface enhanced Raman scattering ,” Invited review, ChemPhysChem, 14, 3186-3195 (2013).
K.A. Willets.  “Super-resolution imaging of interactions between molecules and plasmonic nanostructures,” Invited perspective, Phys. Chem. Chem. Phys. (Special themed issue on Plasmonics and Spectroscopy) 15, 5345-5354 (2013).
A.J. Wilson and K.A. Willets.  “Surface-enhanced Raman scattering (SERS) imaging using noble metal nanoparticles,” Invited focus article, WIRES Nanomedicine and Nanobiotechnology.  5, 180-189 (2013).
E.J. Titus and K.A. Willets, “Applying super-resolution imaging techniques to problems in SERS,” Invited book chapter, Frontiers of Surface-Enhanced Raman Scattering: Single-Nanoparticles and Single Cells” (Eds. Yukihiro Ozaki, Katrin Kneipp, and Ricardo Aroca) from John Wiley & Sons, Chichester, UK.
K.L. Blythe, K.M. Mayer, M.L. Weber, K.A. Willets.  “Ground state depletion microscopy for imaging interactions between gold nanowires and fluorophore-labeled ligands.”  Invited article. Phys. Chem. Chem. Phys. 15, 4136-4145 (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).
B. Cannon, A. Campos, Z. Lewitz, K.A. Willets, R. Russell.  “Zeptomole detection of DNA nanoparticles by single-molecule fluorescence with magnetic field-directed localization.”  Anal. Biochem.  431, 40-47 (2012).
K.A. Willets.  “Probing local electromagnetic field enhancements on the surface of plasmonic nanoparticles.”  Invited review, Prog. Surf. Sci. 87, 209–220 (2012).
M.L. Weber, K.A. Willets.  “Nanoscale studies of plasmonic hot spots using super-resolution optical imaging.”  Invited review, MRS Bulletin, 37, 745-751 (2012).
K.A. Koen, M.L. Weber, K.M. Mayer, E. Fernandez, K.A. Willets.  “Spectrally-resolved polarization anisotropy of single plasmonic nanoparticles excited by total internal reflection.”  J. Phys. Chem. C.  116, 16198−16206 (2012).
J.C. Heckel, A.L. Weisman, S.T. Schneebeli, M.L. Hall, L.J. Sherry, S.M. Stranahan, K.H. Dubay, R.A. Friesner, K.A. Willets.  “Polarized Raman spectroscopy of oligothiophene crystals to determine unit cell orientation.”  J. Phys. Chem. A.  116, 6804–6816 (2012).
K.A. Willets, S.M. Stranahan.  “Super-resolution imaging of diffusing analyte in surface-enhanced Raman scattering hot-spots.” Proc. SPIE. 8228, 82280P (2012).
K.A. Willets, K. Mayer. “Surface-enhanced Raman scattering (SERS) characterization of metal-organic interactions.  Invited book chapter. Handbook of organic materials for optical and optoelectronic devices: properties and applications. (Ed. Oksana Ostroverkhova) Woodhead Publishing, Cambridge, UK (2013).
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).  **Highlighted in “In Nano,” ACS Nano. 6, 990-992 (2012).
I. Kaplan-Ashiri, E.J. Titus, K.A. Willets.  “In situ chemical functionalization of a single carbon nanotube functionalized AFM tip using a correlated optical and atomic force microscope.” Proc. Mat. Res. Soc. 1318, 1-6 (2011).
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).  **Featured in ACS Noteworthy Chemistry, August 1, 2011.
K.A. Homan, J. Chen, A. Schiano, M. Mohamed, K.A. Willets, S. Murugesan, K.J. Stevenson, and S. Emelianov.  “Silver-polymer composite stars: Synthesis and applications.” Adv. Func. Mat. 21, 1673-1680 (2011).
I. Kaplan-Ashiri, E.J. Titus, K.A. Willets.  “Subdiffraction-limited far field Raman spectroscopy of single carbon nanotubes: an unenhanced approach.” ACS Nano.  5, 1033–1041 (2011).
S. M. Stranahan, K.A. Willets.  “Super-resolution optical imaging of single-molecule SERS hot spots.” Nano Lett. 10, 3777-3784 (2010).
Please see CV for publications before 2010.