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Issue 15, 2013
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Super-resolution imaging of interactions between molecules and plasmonic nanostructures

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Abstract

Super-resolution far-field imaging has recently emerged as a novel strategy for imaging interactions between plasmonic nanostructures and single molecules with spatial resolution <5 nm. In these experiments, the emission centroid of a diffraction-limited spot is modeled as a two-dimensional Gaussian, allowing the position of an emitter to be determined with nanoscale precision. In this perspective, we describe the principles of super-resolution far-field imaging and then highlight its application to several different problems in plasmonics, including surface-enhanced fluorescence of ligands bound to nanoparticle surfaces, nanoparticle-mediated catalysis, and mapping electromagnetic hot spots. In all cases, the complex coupling between molecular emission and plasmon modes of the underlying nanostructure must be considered. While this complicates the interpretation of super-resolution images of plasmonic systems, the coupling also opens new doors for understanding the fundamental interactions between molecules and plasmonic nanostructures.

Graphical abstract: Super-resolution imaging of interactions between molecules and plasmonic nanostructures

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Article information


Submitted
01 Nov 2012
Accepted
07 Jan 2013
First published
08 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 5345-5354
Article type
Perspective

Super-resolution imaging of interactions between molecules and plasmonic nanostructures

K. A. Willets, Phys. Chem. Chem. Phys., 2013, 15, 5345
DOI: 10.1039/C3CP43882A

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