title: Bottom-up synthesis of gold octahedra with tailorable hollow features.
abstract: Gold octahedra with hollow features have been synthesized in high yield via the controlled overgrowth of preformed concave cube seeds. This Ag(+)-assisted, seed-mediated synthesis allows for the average edge length of the octahedra and the size of the hollow features to be independently controlled. We propose that a high concentration of Ag(+) stabilizes the {111} facets of the octahedra through underpotential deposition while the rate of Au(+) reduction controls the dimensions of the hollow features. This synthesis represents a highly controllable bottom-up approach for the preparation of hollow gold nanostructures.
authors.affiliation: Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Langille
authors.forename: Michelle L
authors.initials: ML
authors.lastname: Personick
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Chad A
authors.initials: CA
authors.lastname: Mirkin