Studies of Hexagonal Pt and Au Nanocluster Superlattices

We have recently synthesized superlattices of Pt and Au nanoclusters grown by inverse micelle techniques. The monodisperse nanosize metal clusters used in this study were synthesized as surfactant aggregates surrounded by an oil-like environment (inverse micelle), a technique developed and patented...

Full description

Saved in:
Bibliographic Details
Published in:Microscopy and microanalysis 1998-07, Vol.4 (S2), p.734-735
Main Authors: Newcomer Provencio, P., Martin, J. E., Odinek, J. G., Wilcoxon, J. P.
Format: Article
Language:English
Subjects:
Capping
Crystals
Gold
Lattice parameters
Ligands
Liquid chromatography
Metal clusters
Micelles
Nanoclusters
Nanophase and Amorphous Materials
Platinum
Salts
Superlattices
Surfactants
Synthesis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have recently synthesized superlattices of Pt and Au nanoclusters grown by inverse micelle techniques. The monodisperse nanosize metal clusters used in this study were synthesized as surfactant aggregates surrounded by an oil-like environment (inverse micelle), a technique developed and patented at Sandia. Reaction byproducts, such as excess surfactant and inorganic ion salts, are often separated from the metal clusters using liquid chromatography size exclusion techniques; however, the Pt and Au nanoclusters in this study have been fractionated using a liquid-liquid technique. The nanoclusters are capped with a ligand. Two-dimensional hexagonal arrays formed readily on surfaces, and large twinned three-dimensional crystals form from solution. Both the cluster size and the size of the capping ligand can be controlled to form superlattices having a range of lattice parameters. We have found that the capping agent exerts a marked influence on the tendency of these clusters to order.
ISSN:1431-9276
1435-8115
DOI:10.1017/S1431927600023795