Enhanced control of plasmonic properties of silver–gold hollow nanoparticles via a reduction-assisted galvanic replacement approach

R. Daniel, Josée and McCarthy, Lauren A. and Ringe, Emilie and Boudreau, Denis (2019) Enhanced control of plasmonic properties of silver–gold hollow nanoparticles via a reduction-assisted galvanic replacement approach. RSC Advances, 9 (1). pp. 389-396. ISSN 2046-2069 DOI https://doi.org/10.1039/C8RA09364D

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Abstract

Hollow noble metal nanoparticles are of growing interest due to their localized surface plasmon resonance (LSPR) tunability. A popular synthetic approach is galvanic replacement which can be coupled with a co-reducer. Here, we describe the control over morphology, and therefore over plasmonic properties including energy, bandwidth, extinction and scattering intensity, offered by co-reduction galvanic replacement. This study indicates that whereas the variation of atomic stoichiometry using the co-reduction method described in this work offers a rather modest tuning range of LSPR energy when compared to traditional galvanic replacement, it nevertheless has a profound effect on shell thickness, which imparts a degree of control over scattering intensity and sensitivity to changes in the dielectric constant of the surrounding environment. Therefore, in this context particle size and gold content become two design parameters that can be used to independently tune LSPR energy and intensity.

Item Type:	Article
Uncontrolled Keywords:	2018AREP; IA74
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences 08 - Green Open Access
Journal or Publication Title:	RSC Advances
Volume:	9
Page Range:	pp. 389-396
Identification Number:	https://doi.org/10.1039/C8RA09364D
Depositing User:	Sarah Humbert
Date Deposited:	01 Feb 2019 13:22
Last Modified:	01 Feb 2019 13:22
URI:	http://eprints.esc.cam.ac.uk/id/eprint/4404

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