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Issue 47, 2019
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Self-assembly of spherical and rod-shaped nanoparticles with full positional control

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Abstract

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.

Graphical abstract: Self-assembly of spherical and rod-shaped nanoparticles with full positional control

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Article information


Submitted
05 Aug 2019
Accepted
02 Nov 2019
First published
20 Nov 2019

Nanoscale, 2019,11, 22841-22848
Article type
Paper

Self-assembly of spherical and rod-shaped nanoparticles with full positional control

J. A. Lloyd, Y. Liu, S. H. Ng, T. Thai, D. E. Gómez, A. Widmer-Cooper and U. Bach, Nanoscale, 2019, 11, 22841
DOI: 10.1039/C9NR06679A

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