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Issue 8, 2015
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Multilayered core–satellite nanoassemblies with fine-tunable broadband plasmon resonances

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Abstract

We report on a robust nanotemplating approach to synthesize plasmonic multilayered core–satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from ∼440 to ∼1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of “hot spots” to maximize the overall enhancement of surface enhanced Raman scattering.

Graphical abstract: Multilayered core–satellite nanoassemblies with fine-tunable broadband plasmon resonances

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Article information


Submitted
17 Nov 2014
Accepted
22 Jan 2015
First published
23 Jan 2015

Nanoscale, 2015,7, 3445-3452
Article type
Communication

Multilayered core–satellite nanoassemblies with fine-tunable broadband plasmon resonances

W. Xiong, D. Sikdar, L. W. Yap, M. Premaratne, X. Li and W. Cheng, Nanoscale, 2015, 7, 3445
DOI: 10.1039/C4NR06756H

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