Show simple item record

dc.contributor.authorHuang, Jianfeng
dc.contributor.authorZhu, Yihan
dc.contributor.authorLiu, Changxu
dc.contributor.authorZhao, Yunfeng
dc.contributor.authorLiu, Zhaohui
dc.contributor.authorHedhili, Mohamed N.
dc.contributor.authorFratalocchi, Andrea
dc.contributor.authorHan, Yu
dc.date.accessioned2015-08-18T08:20:45Z
dc.date.available2015-08-18T08:20:45Z
dc.date.issued2015-08-13
dc.identifier.citationFabricating a Homogeneously Alloyed AuAg Shell on Au Nanorods to Achieve Strong, Stable, and Tunable Surface Plasmon Resonances 2015:n/a Small
dc.identifier.issn16136810
dc.identifier.doi10.1002/smll.201501220
dc.identifier.doi10.1002/smll.201570243
dc.identifier.urihttp://hdl.handle.net/10754/574950
dc.description.abstractColloidal metal nanocrystals with strong, stable, and tunable localized surface plasmon resonances (SPRs) can be useful in a corrosive environment for many applications including field-enhanced spectroscopies, plasmon-mediated catalysis, etc. Here, a new synthetic strategy is reported that enables the epitaxial growth of a homogeneously alloyed AuAg shell on Au nanorod seeds, circumventing the phase segregation of Au and Ag encountered in conventional synthesis. The resulting core–shell structured bimetallic nanorods (AuNR@AuAg) have well-mixed Au and Ag atoms in their shell without discernible domains. This degree of mixing allows AuNR@AuAg to combine the high stability of Au with the superior plasmonic activity of Ag, thus outperforming seemingly similar nanostructures with monometallic shells (e.g., Ag-coated Au NRs (AuNR@Ag) and Au-coated Au NRs (AuNR@Au)). AuNR@AuAg is comparable to AuNR@Ag in plasmonic activity, but that it is markedly more stable toward oxidative treatment. Specifically, AuNR@AuAg and AuNR@Ag exhibit similarly strong signals in surface-enhanced Raman spectroscopy that are some 30-fold higher than that of AuNR@Au. When incubated with a H2O2 solution (0.5 m), the plasmonic activity of AuNR@Ag immediately and severely decayed, whereas AuNR@AuAg retained its activity intact. Moreover, the longitudinal SPR frequency of AuNR@AuAg can be tuned throughout the red wavelengths (≈620–690 nm) by controlling the thickness of the AuAg alloy shell. The synthetic strategy is versatile to fabricate AuAg alloyed shells on different shaped Au, with prospects for new possibilities in the synthesis and application of plasmonic nanocrystals.
dc.language.isoen
dc.relation.urlhttp://doi.wiley.com/10.1002/smll.201501220
dc.rightsThis is the peer reviewed version of the following article: Huang, J., Zhu, Y., Liu, C., Zhao, Y., Liu, Z., Hedhili, M. N., Fratalocchi, A. and Han, Y. (2015), Fabricating a Homogeneously Alloyed AuAg Shell on Au Nanorods to Achieve Strong, Stable, and Tunable Surface Plasmon Resonances. Small. doi: 10.1002/smll.201501220, which has been published in final form at http://doi.wiley.com/10.1002/smll.201501220. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
dc.subjectAg stability
dc.subjectAu nanorods
dc.subjecthigh plasmonic activities
dc.subjecthomogeneous AuAg alloys
dc.subjecttunable surface plasmon resonances
dc.titleFabricating a Homogeneously Alloyed AuAg Shell on Au Nanorods to Achieve Strong, Stable, and Tunable Surface Plasmon Resonances
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.contributor.departmentChemical Science Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentPRIMALIGHT Research Group
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalSmall
dc.eprint.versionPost-print
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personZhu, Yihan
kaust.personLiu, Changxu
kaust.personZhao, Yunfeng
kaust.personHedhili, Mohamed N.
kaust.personFratalocchi, Andrea
kaust.personHan, Yu
kaust.personHuang, Jianfeng
kaust.personLiu, Zhaohui
refterms.dateFOA2016-08-13T00:00:00Z
dc.date.published-online2015-08-13
dc.date.published-print2015-10


Files in this item

Thumbnail
Name:
Manuscript_Accepted Small.pdf
Size:
1.085Mb
Format:
PDF
Description:
Accepted Manuscript
Thumbnail
Name:
smll201501220-sup-0001-S1.pdf
Size:
1.843Mb
Format:
PDF
Description:
Supplemental files

This item appears in the following Collection(s)

Show simple item record