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BP: Fachverband Biologische Physik

BP 11: Bioimaging and Spectroscopy II

BP 11.7: Vortrag

Montag, 7. März 2016, 17:00–17:15, H43

Seeing intermolecular interactions in morphology: AFM-IR of aggregated thin porphyrin films — •Timur Shaykhutdinov, Peter Kate, Simona Pop, Andreas Furchner, and Karsten Hinrichs — Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., ISAS Berlin, Schwarzschildstr. 8, 12489 Berlin, Germany

A comprehensive understanding of hierarchical self-assembly of low-dimensional supramolecular systems is of fundamental importance for applications in the field of nanobiotechnology and bioengineering. Metalloporphyrins are extremely versatile molecular building blocks and serve as active components in a variety of biological systems. Their capability to self-organize over a wide range of length scales spanning from a few nanometers up to hundreds of micrometers is promising for the development of multifunctional biofilms.

Although the morphology of porphyrin aggregates has been studied extensively, their formation mechanisms have remained unclear up till now. In this work we show nanoscale IR spectroscopic evidence of different porphyrin stacking as the underlying cause of morphological patterns of aggregated thin porphyrin films.

Here we apply resonance-enhanced AFM-IR, a high-sensitivity non-destructive nanospectroscopic technique in the fingerprint region, and link intermolecular stacking interactions to nanostructured morphology.