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Super-resolution imaging of interactions between molecules and plasmonic nanostructures

机译：分子与等离子体纳米结构之间相互作用的超分辨率成像

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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 nanopartide 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.
机译：超分辨率远场成像最近已成为一种新颖的策略，用于对等离激元纳米结构与空间分辨率<5 nm的单个分子之间的相互作用进行成像。在这些实验中，将衍射极限光斑的发射质心建模为二维高斯模型，从而可以纳米级精度确定发射器的位置。从这个角度出发，我们描述了超分辨率远场成像的原理，然后重点介绍了其在等离子体中的几个不同问题的应用，包括与纳米粒子表面结合的配体的表面增强荧光，纳米粒子介导的催化作用以及绘制电磁热点图。在所有情况下，都必须考虑分子发射与基础纳米结构的等离振子模式之间的复杂耦合。尽管这使对等离激元系统的超分辨率图像的解释变得复杂，但这种耦合也为理解分子与等离激元纳米结构之间的基本相互作用打开了新的大门。

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