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  • Title: Synthesis of Au@Ag core-shell nanocubes containing varying shaped cores and their localized surface plasmon resonances.
    Author: Gong J, Zhou F, Li Z, Tang Z.
    Journal: Langmuir; 2012 Jun 19; 28(24):8959-64. PubMed ID: 22299655.
    Abstract:
    We have synthesized Au@Ag core-shell nanocubes containing Au cores with varying shapes and sizes through modified seed-mediated methods. Bromide ions are found to be crucial in the epitaxial growth of Ag atoms onto Au cores and in the formation of the shell's cubic shape. The Au@Ag core-shell nanocubes exhibit very abundant and distinct localized surface plasmon resonance (LSPR) properties, which are core-shape and size-dependent. With the help of theoretical calculation, the physical origin and the resonance mode profile of each LSPR peak are identified and studied. The core-shell nanocrystals with varying shaped cores offer a new rich category for LSPR control through the plasmonic coupling effect between core and shell materials.
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