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dc.contributor.authorShi, Seen_US
dc.contributor.authorLi, Anranen_US
dc.contributor.authorHuang, Renliangen_US
dc.contributor.authorYu, Jingen_US
dc.contributor.authorLi, Shuzhouen_US
dc.contributor.authorQi, Weien_US
dc.contributor.authorHe, Zhiminen_US
dc.contributor.authorSu, Rongxinen_US
dc.identifier.citationShi, S., Li, A., Huang, R., Yu, J., Li, S., Qi, W., He, Z. & Su, R. (2020). In situ growth of Au-Ag bimetallic nanorings on optical fibers for enhanced plasmonic sensing. Journal of Materials Chemistry C, 8(22), 7552-7560.
dc.description.abstractHighly functionalized materials at the nanoscale on optical fibers offer notable opportunities to construct "lab-on-fiber" functional devices with unusual properties. However, it is extremely difficult to fabricate nanostructures with special morphology on a thin cylindrical optical fiber surface using the commonly used physical lithography techniques. Meanwhile, it is vital to maintain the plasmonic properties of Ag-riched particles while improving their stability. Herein, we design a facile strategy for the fabrication of Au-Ag bimetallic nanorings (Au-Ag NRs) immobilized on optical fibers for enhanced plasmonic properties. Ag NPs are first grownin situon an optical fiber surface through chelation and redox of polydopamine (PDA) to metal ions, and then are quickly converted into Au-Ag NRs by a galvanic replacement reaction and metal deposition. This conversion only takes 3.5 min, while the formed Au-Ag NRs exhibit outstanding localized surface plasmon resonance (LSPR) sensitivity (2204 nm per RIU) and oxidation resistance, and Au and Ag atoms are distributed uniformly in the nanorings. Furthermore, a novel and interesting formation process of the nanorings including deformation, spallation, growth in the gaps, and ring formation is studied. These findings provide a way to grow bimetallic nanorings on optical fibers, which are promising candidates for photoelectric "lab-on-fiber" devices.en_US
dc.relation.ispartofJournal of Materials Chemistry Cen_US
dc.rights© The Royal Society of Chemistry 2020en_US
dc.titleIn situ growth of Au-Ag bimetallic nanorings on optical fibers for enhanced plasmonic sensingen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsGold Nanoringsen_US
dc.description.acknowledgementThis work was supported by the Hainan Provincial Natural Science Foundation of China (No. 519QN179) and the National Natural Science Foundation of China (No. 21621004 and 51473115).en_US
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