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Abstract: 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. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.
Fuente: Nanomaterials 2017, 7(12), 425
Publisher: MDPI
Publication date: 01/12/2017
No. of pages: 14
Publication type: Artículo de Revista
DOI: 10.3390/nano7120425
ISSN: 2079-4991
Spanish project: FIS2013-45854-P
Publication Url: https://doi.org/10.3390/nano7120425
Consult in UCrea Read publication
YAEL GUTIERREZ VELA
MARIA DOLORES ORTIZ MARQUEZ
JOSE MARIA SAIZ VEGA
FRANCISCO GONZALEZ FERNANDEZ
EVERITT, HENRY O.
FERNANDO MORENO GRACIA
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