Berlin 2015 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 28: Poster Session II

MM 28.20: Poster

Dienstag, 17. März 2015, 18:30–20:30, Poster E

Highly ordered one-dimensional metal nanowire arrays for SERS — •yong-tae kim1, stefan l. schweizer1, jörg schilling1, and ralf b. wehrspohn1,21Martin-Luther-University Halle-Wittenberg, Halle, Germany — 2Fraunhofer Institute for Mechanics of Materials, Halle, Germany

Recent progress in nanotechnology have created new insight about controlling various structures and properties of nanostructured materials that can support surface plasmons for specific applications. Especially metallic nanostructured materials made of noble metals show localized surface plasmon resonance (LSPR) phenomenon when the materials interact with incident light of correct frequency and polarization.

Surface-enhanced Raman spectroscopy (SERS) has been recognized as a useful tool for ultra-sensitive detection of trace amount of chemicals with fingerprint character. The SERS intensity depend strongly on the electromagnetic field enhancement induced from LSPR at nanogaps between plasmonic nanostructures, called hot spots. To obtain high sensitivity and good reproducibility of SERS signal, it is required to have a highly ordered nanostructures with well-controlled narrow gaps that induce hot spots.

Herein, highly ordered one-dimensional metal nanowire arrays with single- or multi-segmental structures composed of gold, silver, and nickel have been prepared via hard-template synthetic method as an active substrate for SERS. Those materials have been investigated to study the effect of dimension and composition of metal nanowire arrays on SERS enhancement factor.

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DPG-Physik > DPG-Verhandlungen > 2015 > Berlin