Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 18: Poster Session I - MA 141/144 (Atomic Wires; Size-Selected Clusters; Nanostructures; Metal Substrates: Clean Surfaces+Adsorption of Organic / Bio Molecules+Solid-Liquid Interfaces+Adsorption of O and/or H; Surface or Interface Magnetism; Oxides and Insulators: Clean Surfaces)
O 18.68: Poster
Montag, 25. Februar 2008, 18:30–19:30, Poster F
SERS on micro-fabricated sharp-etched nanostructures — •Henrik Schneidewind1, Uwe Hübner1, Dana Cialla2, Roland Matthes1, Jörg Petschulat3, Siegmund Schröter1, and Jürgen Popp1,2 — 1Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany — 2Friedrich-Schiller-University Jena, Department of Physical Chemistry, Jenaer Biochip Initiative (JBCI), Helmholtzweg 4, 07743 Jena, Germany — 3Friedrich-Schiller-University Jena, Institute of Applied Physics, Center for Ultra-Optics, Max-Wien-Platz 1, 07743 Jena, Germany
We introduce highly reproducible metallic nanostructure arrays which can be used as active substrates for the Surface Enhanced Raman Spectroscopy (SERS). The arrays were prepared by means of e-beam lithography, vacuum deposition, and ion-beam etching. The sharp-edged gold nanostructures with corner radii smaller than 20 nm are arranged in arrays with a periodicity of 200 nm. Sharp-edged structures were chosen instead of round dots, which are easier to prepare, in order to achieve large enhancement factors by using the lightning rod effect. The resonance frequency of the arrays was determined by using UV-Vis-spectrometry in order to select the excitation wavelength for SERS experiments. The arrays showing uniform SERS-signals across the whole field size of 0.2 mm in edge length are ready for practical use, which will be shown using a dye as test substance.