Abstract
We have developed a methodology to investigate the three-dimensional (3D) morphology dependent plasmon resonance spectra of nanoparticles fabricated on a transparent substrate. This involves fabricating multihierarchy arrayed microwindows on glass coverslips using UV lithography, fabricating nanoparticles of different shapes in these microwindows by a modified nanosphere lithography, recording the localized surface plasmon resonance (LSPR) spectra by a dark-field microscopy and spectroscopy, and correlating the 3D structure of individual nanoparticles obtained by atomic force microscopy (AFM) with their LSPR spectra. This technique allows for the correlation and orientation of the same single nanoparticles by different instruments. Here we use it to identify the optical responses of single Ag nanoparticles and study their shape-dependent and 3D local morphology dependent LSPR spectra of single nanoparticles.
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