Issue 42, 2010

Nanoscale force induced size-selective separation and self-assembly of metal nanoparticles: sharp colloidal stability thresholds and hcp ordering

Abstract

A simple and versatile nanoscale force induced precipitation approach for the separation of gold nanoparticles (AuNPs) was developed. The AuNPs show sharp size-dependent colloidal stability thresholds as a function of salt concentration. Upon separation, the AuNPs were electrostatically self-assembled onto silicon substrates by fine-tuning interparticle and particle-substrate forces, forming 2D AuNP networks with a high degree of hexagonal closest pack (hcp) superstructures.

Graphical abstract: Nanoscale force induced size-selective separation and self-assembly of metal nanoparticles: sharp colloidal stability thresholds and hcp ordering

Supplementary files

Article information

Article type
Communication
Submitted
08 Jul 2010
Accepted
01 Sep 2010
First published
27 Sep 2010

Chem. Commun., 2010,46, 7963-7965

Nanoscale force induced size-selective separation and self-assembly of metal nanoparticles: sharp colloidal stability thresholds and hcp ordering

Y. Zheng, C. H. Lalander and U. Bach, Chem. Commun., 2010, 46, 7963 DOI: 10.1039/C0CC02428G

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