Platinum-Coated, Nanoporous Gold Nanorod Arrays: Synthesis and Characterization


  • This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, KRF-2005-005-J11902, and KRF-C00050) and the Korea Science and Engineering Foundation (R01-2006-000-10426-0-2006). S.P. thanks SKKU for start-up funds, and S.-H.Y. thanks SKKU for an RA fellowship.


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The fabrication of Pt-coated, vertically aligned, nanoporous gold-nanorod arrays (see figure, left panel) that display electrocatalytically active large surface areas is described. Epitaxial platinum coatings only 1–2 monolayers thick are prepared by the spontaneous replacement of an electrochemically deposited copper layer with platinum metal. Electrochemical characterization of the resulting nanoporous nanorod arrays (see figure, right panel) is carried out as a method for probing catalytic behavior.