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Evolution of plasmonic mode (2) during the tailored overgrowth process to emphasize the nature of in-phase and mirror charges. The mirror charges occur exclusively in the overlap region of interband and intraband of gold and silver, respectively. Surface charge distribution plots of (a) the gold nanorod core and (b–e) Au@Ag cuboids of different dimensions [width/length] and shell thicknesses (side/end). All units are in nanometers.
