Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 20: Poster Scanning Probe Microscopy: Light-Matter Interactions at the Atomic Scale
O 20.9: Poster
Montag, 17. März 2025, 18:00–20:00, P2
Mapping adsorbed states of iron(II) phthalocyanine on Ag surfaces by plasmon-enhanced Raman spectroscopy — Borja Cirera1, •Rodrigo Cezar de Campos Ferreira2,3, Amandeep Sagwal2, Jiří Doležal3, Martin Švec2,3, and Pablo Merino1 — 1Instituto de Ciencia de Materiales de Madrid, Spain — 2Institute of Physics, Czech Academy of Sciences, Czech Republic — 3Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Czech Republic
The high spatial confinement of a plasmonic field in LT-SPM has become a valuable tool for near-field spectroscopies. Among the techniques, Raman scattering enables chemical identification, investigation of relations between adsorption geometry and vibrational fingerprints in real space at single-molecule level.[1,2] Here we studied different adsorption configurations of iron(II) phthalocyanines (FePc) on Ag(110) and Ag(111) crystal surfaces. Real-space mapping reveals the appearance of shifted Raman states when adsorbed in specific geometries. Results and simulations suggest that the breaking in symmetry with respect to the main crystallographic directions of the substrates are the leading reason for this phenomenon. [1] Y. Zhang et. al. Nature 498, 82-86 (2013). [2] R. Zhang et. al. National Science Review, Volume 6, 2019, 1169-1175.
Keywords: SPM; TERS; phthalocyanine