Bottom-Up Synthesis of Gold Octahedra with Tailorable Hollow Features

Authors

Mark R. Langille, Northwestern UniversityFollow
Michelle L. Personick, Northwestern University
Jian Zhang, University of Nebraska-LincolnFollow
Chad A. Mirkin, Northwestern UniversityFollow

Document Type

Article

Date of this Version

2011

Comments

Published in Journal of the American Chemical Society 133:27 (2011), pp. 10414–10417; doi: 10.1021/ja204375d Copyright © 2011 American Chemical Society. Used by permission.

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.