Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.74: Poster

Wednesday, March 16, 2011, 17:30–21:00, P4

Parallel methods for the fabrication of gold nanocones — •Andreas Horrer, Christian Schäfer, Yuliya Fulmes, Dominik Gollmer, Monika Fleischer, and Dieter Kern — Institut für Angewandte Physik, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen

When interacting with an electromagnetic field, metallic nanoparticles create a local field enhancement caused by excitation of localized surface plasmons. The resonance frequency depends on the shape, the size and the material of the nanoparticle and its dielectric environment. At the tip of a nanocone the field enhancement is particularly strong. A large array of identical nanocones could be used for biosensing. The fabrication of such large arrays in reasonable time requires parallel methods. Nanosphere lithography is a low cost technique which utilizes highly ordered self-assembled hexagonally close-packed layers of colloids. Different processes were developed using double or monolayers of polystyrene beads. They either directly act as an etch mask, or as a mask for the deposition of an aluminium oxide etch mask for an underlying gold layer, from which the cones are formed in an argon ion milling step.