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Open AccessFeature PaperArticle

The UV Plasmonic Behavior of Distorted Rhodium Nanocubes

1
Department of Applied Physics, University of Cantabria, Avda. Los Castros, s/n., 39005 Santander, Spain
2
Department of Physics, Duke University, Durham, NC 27708, USA
3
U.S. Army Aviation and Missile RD&E Center, Redstone Arsenal, Huntsville, AL 35898, USA
*
Author to whom correspondence should be addressed.
Nanomaterials 2017, 7(12), 425; https://doi.org/10.3390/nano7120425
Received: 6 October 2017 / Revised: 24 November 2017 / Accepted: 28 November 2017 / Published: 4 December 2017
For applications of surface-enhanced spectroscopy and photocatalysis, the ultraviolet (UV) plasmonic behavior and charge distribution within rhodium nanocubes is explored by a detailed numerical analysis. The strongest plasmonic hot-spots and charge concentrations are located at the corners and edges of the nanocubes, exactly where they are the most spectroscopically and catalytically active. Because intense catalytic activity at corners and edges will reshape these nanoparticles, distortions of the cubical shape, including surface concavity, surface convexity, and rounded corners and edges, are also explored to quantify how significantly these distortions deteriorate their plasmonic and photocatalytic properties. The fact that the highest fields and highest carrier concentrations occur in the corners and edges of Rh nanocubes (NCs) confirms their tremendous potential for plasmon-enhanced spectroscopy and catalysis. It is shown that this opportunity is fortuitously enhanced by the fact that even higher field and charge concentrations reside at the interface between the metal nanoparticle and a dielectric or semiconductor support, precisely where the most chemically active sites are located. View Full-Text
Keywords: UV plasmonics; rhodium; nanoparticles; photocatalysis UV plasmonics; rhodium; nanoparticles; photocatalysis
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Gutiérrez, Y.; Ortiz, D.; Saiz, J.M.; González, F.; Everitt, H.O.; Moreno, F. The UV Plasmonic Behavior of Distorted Rhodium Nanocubes. Nanomaterials 2017, 7, 425.

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