Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 7: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...): Session I
DS 7.10: Vortrag
Montag, 12. März 2018, 17:30–17:45, H 2032
Supramolecular Heterostructures - expanding molecular self-assembly beyond 2D — •Vladimir Korolkov1, Kenji Watanabe3, Takashi Taniguchi3, Matteo Baldoni2, Elena Besley2, Nicholas Besley2, and Peter Beton1 — 1School of Physics and Astronomy, The University of Nottingham, UK — 2University Park — 3University of Nottingham, University Park
For a long time the molecular self-assembly has been limited to engineering 2D molecular structures on surfaces. Here we demonstrate a successful approach that extends self-assembly into 3D by creating supramolecular heterostructures - layered organic materials stabilized by hydrogen bonds in plane and by van der Waals interactions between layers. SHs are formed by growing sequential layers of bi- and mono-component two-dimensional supramolecular arrays. The heterostructures are formed on hexagonal boron nitride by depositing of cyanuric acid/melamine, 5,10,15,20-tetrakis(4-carboxylphenyl) porphyrin, trimesic acid and terephthalyc acid. We analyzed this heterostructures with ambient Atomic Force Microscopy that routinely achieve 0.1 nm resolution. AFM has confirmed that there is a clear epitaxial arrangement between these layers. We demonstrate that heterostructure formation may be used to control the functional properties of supramolecular layers through a shift of the fluorescence peak position.
1 - Korolkov et al. Nature Chemistry, 2017