Regensburg 2013 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 15: Poster Session
MM 15.42: Poster
Montag, 11. März 2013, 18:00–20:00, Poster E
Highly ordered metal nanowire arrays as active substrate of SERS — •Yong-Tae Kim1, Stefan L. Schweizer1, and Ralf. B. Wehrspohn1,2 — 1Martin-Luther-University Halle-Wittenberg — 2Fraunhofer Institute for Mechanics of Materials
Metallic nanostructured materials have fascinating potential applications in the nanodevices, especially as an efficient substrate for surface-enhanced Raman scattering (SERS). In SERS, as one of the most promising optical sensing techniques, the Raman signal can be amplified by several orders of magnitude by the use of metallic nanostructure substrates. 1-dimensional metallic nanostructures show some advantages associated with their anisotropic architecture and enable to be employed as highly active substrate of SERS.
The key obstacle for the practical use of SERS devices is the lack of robust and facile fabrication strategies for reproducible SERS substrates with stable enhancement. Although traditional SERS substrates such as colloidal nanoparticles, metal islands, and fractal film provide significant SERS enhancement, the well ordered 1-dimensional metallic SERS substrates with reproducible and deterministic geometries are needed for detection of trace level molecules in gases or liquids.
In this study, single- or multi-segmented 1-dimensional highly ordered metallic nanowire arrays composed of nickel, silver, and gold have been fabricated by simple pulsed electrodeposition in the pores of anodic aluminum oxide (AAO). Various 1-dimensional metallic nanowire arrays with different diameter, length, and sequence of metal segments are tailored as active substrate of SERS.