Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Plasmonics and Nanooptics
O 59.29: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-OG1
Biosensing with plasmonic gold nanorod arrays — •Tino Uhlig1, Stephanie Klinghammer2, Larysa Baraban2, Gianaurelio Cuniberti2, and Lukas Eng1 — 1Institute of Applied Physics, Chair of Experimental Physics/ Photophysics, Technische Universität Dresden, D-01062 Dresden, Germany — 2Institute for Material Science, Chair of Material Science and Nanotechnology, Technische Universität Dresden, D-01062 Dresden, Germany
Label-free biosensing based on localized surface-plasmon resonances (LSPR) in noble-metal nanostructures has gained a lot of interest in past years. This is mostly due to the possibility of spectral tuning, miniaturization and flexible integration into nanobiotechnological architectures (e.g. microfluidics). Here we report on the fabrication of such a LSPR biosensor based on extended arrays of gold nano-antennas [1,2]. These nanorod carpets are prepared by electro-chemical filling of gold into nanometer-sized pores in an anodized aluminum oxide (AAO) template [3]. The chosen fabrication method [3] allows for a wide range of spectral tunability at visible wavelengths [2], hence facilitating optimized sensor-array performance at the highest sensitivity in the nanomolar range. We demonstrate the feasibility of our approach through monitoring the reproducible binding/unbinding of complementary single-stranded DNA molecules used here as a model system.
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