Materials Science and NanoEngineering Publications
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Browsing Materials Science and NanoEngineering Publications by Subject "alloy nanoparticles"
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Item Plasmon and compositional mapping of plasmonic nanostructures(SPIE, 2014) Ringe, Emilie; Collins, Sean M.; DeSantis, Christopher J.; Skrabalak, Sara E.; Midgley, Paul A.Recently, co-reduction of Au and Pd has allowed the synthesis of complex Au core/AuPd shell nanoparticles with elongated tips and cubic-like symmetry. Optical studies have shown strong plasmonic behavior and high refractive index sensitivities. In this paper, we describe the composition and the near-field plasmonic behavior of those complex structures. Monochromated STEM-EELS, Cathodoluminescence, and EDS mapping reveals the different resonant modes in these particles, and shows that Pd, a poor plasmonic metal, does not prevent strong resonances and could actually be extremely helpful for plasmon-enhanced catalysis.