Self-Assembly of Ordered, Robust, Three-Dimensional Gold Nanocrystal/ Silica Arrays

Journal Article

We report the synthesis of a new nanocrystal (NC) mesophase through self-assembly of water-soluble NC micelles with soluble silica. The mesophase comprises gold nanocrystals arranged within a silica matrix in a face-centered cubic lattice with cell dimensions that are adjustable through control of the nanocrystal diameter and/or the alkane chain lengths of the primary alkanethiol stabilizing ligands or the surrounding secondary surfactants. Under kinetically controlled silica polymerization conditions, evaporation drives self-assembly of NC micelles into ordered NC/silica thin-film mesophases during spin coating. The intermediate NC micelles are water soluble and of interest for biolabeling. Initial experiments on a metal-insulator-metal capacitor fabricated with an ordered three-dimensional gold nanocrystal/silica array as the "insulator" demonstrated collective Coulomb blockade behavior below 100 kelvin and established the current-voltage scaling relationship for a well-defined three-dimensional array of Coulomb islands.

Full Text

Duke Authors

Cited Authors

  • Fan, H; Yang, K; Boye, DM; Sigmon, T; Malloy, KJ; Xu, H; López, GP; Brinker, CJ

Published Date

  • 2004

Published In

  • Science

Volume / Issue

  • 304 / 5670

Start / End Page

  • 567 - 571

Digital Object Identifier (DOI)

  • 10.1126/science.1095140