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Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles

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Abstract

Core/shell nanoparticles are of interest due to their attractive optical, electronic, and catalytic properties. By combining these core/shell features with physical anisotropy of the shell – by selectively capping only a portion of the core – nanostructures with unique properties can be formed. This work presents the synthesis and investigates the plasmonic properties of silver nanocube (AgNC)/cuprous oxide core/half-shell nanoparticles. The developed partial shell growth technique is suitable for any room temperature two-step core/shell synthesis. Using this technique AgNC/Cu2O core/shell nanoparticles were formed with a distinct half-shell morphology, either pyramidal or cubic, where the geometry of the half-shell can be precisely controlled by selecting specific synthesis conditions. Furthermore, the cuprous oxide half-shells induced hybridization of the plasmon modes in the silver core and thus enabled spatial and spectral manipulation of plasmon resonances for nanoparticles in suspension. The proposed core/half-shell morphology will be particularly advantageous for directed assembly, formation of dimers for SERS sensing, or as individual particles for catalysis.

Graphical abstract: Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles

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Article information


Submitted
27 Nov 2019
Accepted
19 Dec 2019
First published
23 Dec 2019

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles

A. Gale-Mouldey, E. Jorgenson, J. P. Coyle, D. Prezgot and A. Ianoul, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06512A

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