Uniform Circular Disks With Synthetically Tailorable Diameters: Two-Dimensional Nanoparticles for Plasmonics
- 6 January 2015
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 15 (2), 1012-1017
- https://doi.org/10.1021/nl5038566
Abstract
Herein, we report the synthesis of structurally uniform gold circular disks as two-dimensional plasmonic nanostructures that complement the well-established one-dimensional rod and three-dimensional shell structures. We show that a Au conproportionation reaction can be used to etch a collection of nonuniform triangular prisms into a uniform circular disk product with thickness and diameter varying <10%. These new particles have broadly tunable plasmon resonances (650-1000 nm) with narrow bandwidths (0.23-0.28 eV) and can be described as "effectively two-dimensional" plasmonic structures, as they do not support a significant transverse mode.Keywords
Funding Information
- Air Force Office of Scientific Research (FA9550-11-1-0275, FA9550-12-1-0280)
- Northwestern University
- state of Illinois
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