Journal
NANOSCALE
Volume 11, Issue 47, Pages 22841-22848Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr06679a
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Funding
- CSIRO through the OCE Science Leader program
- Australian Research Council [CE170100026, DP160104575, LE170100235, FT140100514, FT140101061]
- ARC [LE140100104]
- Australian Research Council [FT140101061, LE170100235, LE140100104] Funding Source: Australian Research Council
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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 highly efficient and assembly yields between 79% (at the tip) and 94% (for the nanoparticle at the long side of the nanorod) are achieved.
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