4.5 Article

Synthesis and characterization of nanoporous gold nanowires

Journal

JOURNAL OF PHYSICAL CHEMISTRY B
Volume 107, Issue 19, Pages 4494-4499

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jp0222200

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We report on a two-step process for the fabrication of nanoporous nanowires. The fabrication process involves electrochemical deposition of a single-phase binary alloy into a nanoporous template, followed by subsequent etching of the less noble component. These particles are characterized by diameters of 20 nm or larger, lengths of up to tens of microns, and a porous structure with controlled pore dimensions. In contrast to conventional solid nanoparticles, nonporous nanowires have a high surface area and a well-defined pore morphology. Furthermore, nanoporous segments can be incorporated into multisegment nanorods or nanowires. Here, we demonstrate the fabrication of nanoporous gold (NPG) nanowires and multisegment nanowires incorporating Au/NPG layers and Pt/NPG layers.

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