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Journal of Nanoparticle Research

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01.06.2013 | Research Paper

Patchy silica-coated silver nanowires as SERS substrates

verfasst von: Simona E. Hunyadi Murph, Catherine J. Murphy

Erschienen in: Journal of Nanoparticle Research | Ausgabe 6/2013

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Abstract

We report a class of core–shell nanomaterials that can be used as efficient surface-enhancement Raman scattering (SERS) substrates. The core consists of silver nanowires, prepared through a chemical reduction process, that are used to capture 4-mercaptobenzoic acid (4-MBA), a model analyte. The shell was prepared through a modified Stöber method and consists of patchy or full silica coats. The formation of silica coats was monitored via transmission electron microscopy, UV–visible spectroscopy, and phase-analysis light-scattering for measuring effective surface charge. Surprisingly, the patchy silica-coated silver nanowires are better SERS substrate than silver nanowires; nanomolar concentration of 4-MBA can be detected. In addition, “nano-matryoshka” configurations were used to quantitate/explore the effect of the electromagnetic field at the tips of the nanowire (“hot spots”) in the Raman scattering experiment.

Vorheriger Artikel Fabrication of core–shell micro/nanoparticles for programmable dual drug release by emulsion electrospraying

Nächster Artikel Amphiphilic copolymers based on polyoxazoline and grape seed vegetable oil derivatives: self-assemblies and dynamic light scattering

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Titel: Patchy silica-coated silver nanowires as SERS substrates
verfasst von: Simona E. Hunyadi Murph
Catherine J. Murphy
Publikationsdatum: 01.06.2013
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 6/2013
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-013-1607-4

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