title: 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.
authors.affiliation: Department of Material Engineering, Monash University, Wellington Rd, Clayton, VIC 3800, Australia.
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Zheng
authors.forename: Cecilia H
authors.initials: CH
authors.lastname: Lalander
authors.forename: Udo
authors.initials: U
authors.lastname: Bach