biostudies-literatureR Daniel JNatural Sciences and Engineering Research Council of CanadaAmerican Chemical Society Petroleum Research FundNational Science Foundation389-396https://www.ebi.ac.uk/biostudies/studies/S-EPMC9059334biostudies-literatureUnknown9(1)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 dielRSC advancesEnhanced control of plasmonic properties of silver-gold hollow nanoparticles <i>via</i> a reduction-assisted galvanic replacement approach.PMC905933456256 DNI51450681Ringe ER Daniel JMcCarthy LABoudreau DfalseEnhanced control of plasmonic properties of silver-gold hollow nanoparticles <i>via</i> a reduction-assisted galvanic replacement approach.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 diel2018-01-01T00:00:00Z2018 Dec2025-04-04T21:33:14.432Z2025-04-04T21:33:14.432ZS-EPMC90593343552159310.1039/c8ra09364d