Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 59: Plasmonics and Nanooptics

O 59.11: Poster

Dienstag, 21. März 2017, 18:30–20:30, P2-OG1

Self-Organized Nanostructures as a Large Area Substrate for Plasmonic Surface-Enhanced IR-Spectroscopy — •Michael Tzschoppe1, Jochen Vogt1, Maria Caterina Giordano2, Filippo Canepa2, Carlo Mennucci2, Francesco Buatier De Mongeot2, and Annemarie Pucci11Kirchhoff Institute for Physics, Heidelberg, Germany — 2Dipartimento di Fisica-Università di Genova, Genova, Italy

Large area arrays of self-organized plasmonic Au nanoantennas were fabricated on soda lime glass wafers over several cm2. To this end, Au was deposited on glass substrates, patterned by an ion beam sputtering technique. In this way it was possible to fabricate nanoantennas with a controlled length distribution leading to highly dichroic plasmonic resonances in the mid-infrared. A self-assembled monolayer of octadecanthiol (ODT) was used to investigate the potential of these nanoantennas as a substrate for surface-enhanced infrared absorption (SEIRA) spectroscopy. Calculations lead to a lower limit of the enhancement factor in the order of 103. The homogeneity of the arrays, which allows measurements on a macroscopic scale with a standard FTIR spectrometer, prove this self-organizing technique to be promising for the synthesis of large area SEIRA substrates for sensing applications.

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