Self-assembly of spherical and rod-shaped nanoparticles with full positional control
Julian A Lloyd, Yawei Liu, Soon Hock Ng, Thibaut Thai, Daniel E Gomez, Asaph Widmer-Cooper, Udo Bach
NANOSCALE | ROYAL SOC CHEMISTRY | Published : 2019
The controlled positioning of spherical gold nanoparticles and gold nanorods upon self-assembly on a substrate is of great interest for the fabrication of tailored plasmonic devices. Here, an electrostatic approach with a sequential two-step assembly protocol is presented as a cost-effective and high-yield alternative to previously presented, more complex proof of concepts. Three different geometries can be separately produced in large quantities relying on electrostatic attraction and repulsion of the charge-carrying building blocks: a single gold nanoparticle at the tip, the side or on top of a gold nanorod. DLVO theory is used to explain the electrostatic assembly strategy. The process is..View full abstract
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Awarded by Australian Research Council
Awarded by ARC
This study has been supported by CSIRO through the OCE Science Leader program and the Australian Research Council through support under grants CE170100026, DP160104575, LE170100235 and Future Fellowships to DEG (FT140100514) and AW (FT140101061). This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). The authors acknowledge use of facilities within the Monash Centre for Electron Microscopy, including instrumentation funded by ARC grant LE140100104.