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Correlating the Structure, Optical Spectra, and Electrodynamics of Single Silver Nanocubes

The plasmonic properties of noble metal nanoparticles have potential uses in a wide variety of technologies based on their optical response.Â’  Recent collaborative efforts of the NU-MRSEC demonstrate that correlated localized surface plasmon resonance (LSPR) spectroscopy and high-resolution transmission electron microscopy (HRTEM) measurements can be used to obtain the optical response and detailed structural information for a single nanoparticle.Â’  By carefully incorporating the HRTEM structural details into finite-difference time-domain (FDTD) electrodynamics calculations, excellent agreement with the LSPR measurements is obtained.


Correlated LSPR-HRTEM measurements of a single nanocube:
(a)Â’  LSPR spectrum (black),
(b)Â’  HRTEM image, and
(c)Â’  HRTEM image with overlaid structural information (in nm). The FDTD calculated scattering cross section is also shown in panel (a) with open red circles.