Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)

O 42.70: Poster

Mittwoch, 25. März 2009, 17:45–20:30, P2

Surface-enhanced resonators for microfluidic and nanofluidic applications — •Beynor Antonio Paez-Sierra¹ and Viktoriia Kolotovska² — ¹QUBITON Laboratories KG, 4040 Linz, Austria — ²Zentrum für Biomedizinische Nanotechnologie, Upper Austrian Research, Austria, 4020 Linz, Austria

Revealing and understanding phenomena at interfaces is an important issue concerning biology, chemistry, engineering, physics, and many other disciplines. Science and technology at the nano- and micro-scale have myriads of proven examples where surface-to-volume ratio becomes dominant for process performance. Thereby, it is of great interest to pursue surface chemistry, tuning of energetic surface levels, control of trap states, or engineering of interface barriers among others, in order to overcome into stable and high efficient optoelectronic processes. We report simulations on surface-enhanced Raman resonators (SERRs) for microfluidic and nanofluidic applications. The process has its origins on the surface-enhanced Raman spectroscopy (SERS) phenomenon, where one main feature consists on the coupling between external electric fields with surface plasmons at strucutred metallic surfaces or colloids, resulting in strong local electric fields. The implementation of surface-enhanced reservoirs or enhanced walls at the fluidic chip, allow to acquire more intense signals of various spectroscopic probes, and hence to reduce the acquisition time.