Table of Contents
Nanomaterials, Volume 7, Issue 12 (December 2017)
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Cover Story (view full-size image) Rh is an intriguing metal due to its good UV plasmonic and photocatalytic properties. The most [...] Read more. Rh is an intriguing metal due to its good UV plasmonic and photocatalytic properties. The most exciting potential of Rh nanoparticles may lie in the possibility of enhancing their already favorable catalytic activity by UV illumination near their plasmonic resonance. Since Rh nanocubes (NCs) have been synthesized in a variety of sizes, we have done a detailed numerical electromagnetic study of this geometry. Here, we show how the strongest plasmonic electromagnetic energy and charge concentrations are located at the corners and edges as these places appear to be the most spectroscopically and catalytically active. Intense catalytic activity at these peripheral positions will reshape the nanoparticles after several cyclic uses, giving rise to distortions of the cubical shape: concave and/or convex faces and rounded corners and edges may appear. These geometrical changes are also analyzed to quantify how these distortions weaken the plasmonic and photocatalytic properties of Rh NCs.