Regensburg 2019 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 12: Poster II

BP 12.75: Poster

Dienstag, 2. April 2019, 14:00–16:00, Poster B2

Planar Antennas for Biosensing and Diagnostics — •Navid Soltani1,2, Nemanja Markesevic1,2, Avijit Kumar Das2,3, Sergey Druzhinin2,4, Heiko Ihmels2,3, Holger Schönherr2,4, and Mario Agio1,21Laboratory of Nano-Optics — 2Research Center of Micro and Nanochemistry and Engineering (Cμ) — 3Organic Chemistry II — 4Laboratory of Physical Chemistry I, University of Siegen, Siegen, Germany

Molecular fluorescence plays an important role in biosensing and diagnostics. However, dye molecules in conventional biochips exhibit radiation patterns such that even with high numerical aperture (NA) objectives a large fraction of the emitted photons is lost. Here, we investigate the implementation of a biosensor based on planar antennas [1], which change the radiation pattern of a dipole emitter and increase the photon collection efficiency by orders of magnitude without requiring high NA objectives. We focus on specific biological relevant molecules [2], interfaces [3] and bioassays to investigate the physical limit of detection down to the single-molecule level and to study the interaction of organic dyes and DNA molecules in nanostructured environments.

[1] S. Checcucci, P. Lombardi, S. Rizvi, F. Sgrignuoli, N. Gruhler, F. B. C. Dieleman, F. S Cataliotti, W.H. P. Pernice, M. Agio and C. Toninelli, Light: Science & Applications 6, 16245 (2017) [2] P. M. Pithan, D. Decker, S. I. Druzhinin, H. Ihmels, H. Schönherr, Y. Voß, RSC Advances, 7, 10660 (2017). [3] N. Hain, D. Wesner, S. I. Druzhinin, H. Schönherr, Langmuir, 32, 11155 (2016).

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