Berlin 2012 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: Plasmonics and nanooptics II

O 26.10: Talk

Tuesday, March 27, 2012, 12:45–13:00, MA 005

Gold Nanocones for Biosensing Applications — •Christian Schaefer, Andreas Horrer, Katharina Broch, Frank Schreiber, Dieter Kern, and Monika Fleischer — Eberhard Karls Universitaet Tuebingen, Institut fuer Angewandte Physik, Auf der Morgenstelle 10, 72076 Tuebingen

The localized surface plasmons in gold nanostructures give rise to strong and strongly localized near-fields which can for example be used to enhance the Raman signal of molecules by several orders of magnitude. We present the fabrication of a highly efficient Raman signal enhancing surface consisting of gold nanocones with tip radii of 10 nm or less. The properties of the cones will be shown by Raman measurements on samples with arrays of nanocones covered by thin layers of Pentacene. With regard to further application in biosensors, the cones can be integrated in microfluidic channels which opens the opportunity to handle small amounts of solutions. Further steps for the capture of molecules out of solution by dielectrophoresis will be presented.