Dresden 2026 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster II
CPP 46.65: Poster
Donnerstag, 12. März 2026, 09:30–11:30, P5
Hybrid field coupling in nanoscale infrared spectroscopic imaging of nano-structured soft matter — •Sharon Xavi1, Mashiat Huq1, Matthias Zeissberger2, Daniela Täuber1,2, and Christin David1,3 — 1Friedrich Schiller University Jena, 07743 Jena — 2Leibniz Institute of Photonic Technology, 07745 Jena — 3University of Applied Sciences, 84036 Landshut, Germany
Anisotropic intensity distributions are frequently observed on nanostructured surfaces in the emerging field of nanoscale infrared (IR) spectroscopic imaging methods, including mid-IR scattering scanning optical nearfield microscopy (IR-sSNOM) and methods combining mid-IR illumination with mechanical detection using atomic force microscopy (AFM-IR). Such methods bridge the gap between high-resolution structural imaging in electron and atomic force microscopy and chemical imaging in conventional far-field IR spectroscopy by overcoming the limitations of optical diffraction in far-field IR spectroscopic imaging. In the mid-IR spectral region, the hybrid field coupling of the incident field with a polymer nanosphere and a metallic AFM probe is nearly as strong as the plasmonic coupling in case of a gold nanosphere [Anindo et al., J. Phys. Chem. C, 2025, 129, 4517]. We modeled this hybrid field coupling on varied nanostructured surfaces to enhance the understanding of the observed anisotropies and contribute to the development of advanced applications of these methods [Ali et al. Anal. Chem., 2025, 97, 23914].
Keywords: photothermal imaging; polymer nanostructures; electric field coupling; AFM-IR; modeling and experiment