Journal article
Size Selective Adsorption of Gold Nanoparticles by Electrostatic Assembly
JA Lloyd, SH Ng, TJ Davis, DE Gómez, U Bach
Journal of Physical Chemistry C | AMER CHEMICAL SOC | Published : 2017
Abstract
In this study, we show that electrostatic interactions between charged substrates containing preattached nanoparticles and bidisperse nanoparticle colloids can be engineered to achieve size selective adsorption and dimer formation. Electrostatic interactions enable the assembly of the dimers with high yields due to the interplay between attractive and repulsive forces resulting from charges confined on the particles and substrate surfaces. We investigate in detail the effects of temperature, incubation time and particle mixing ratios of the bidisperse solution and benchmark the size-selectivity for different scenarios. Driving forces of the assembly process are explained using DLVO theory (D..
View full abstractGrants
Awarded by Australian Research Council
Funding Acknowledgements
This study has been supported by CSIRO through the OCE Science Leader program and the Australian research Council through an Australian Research Fellow grant (DP110105312) to U.B. and a Future Fellowship to D.E.G. (FT140100514). This work was performed in part at the Melbourne Centre for Nanofabrication, the Victorian Node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australia's researchers. The authors acknowledge use of facilities within the Monash Centre for Electron Microscopy. This research used equipment funded by Australian Research Council Grant LE140100104.