title: Supramolecular self-assembly initiated by solid-solid wetting.
abstract: We present a preparation method for self-assembled supra-molecular monolayers of unsubstituted organic semiconductors and pigments on a solid substrate, applicable under ambient conditions. The deposition is based on a solid-solid wetting phenomenon, whereas the subsequent layer growth proceeds according to standard models. Molecular adsorption results from direct contact of the compound in a nanocrystalline state with the solid surface. Based on complementary force field calculations, we propose that molecules disintegrate from the crystalline state and adsorb on the surface because of a gain in binding energy. The preparation method is exemplified by means of a linear hydrogen-bonded system, namely quinacridone (QAC) on graphite. In addition, the chosen system allows us to actively guide the self-assembly after deliberate removal of molecules from a predefined area.
authors.affiliation: Department für Geo-und Umweltwissenschaften & Center for NanoScience (CeNS), LMU München, Theresienstrasse 41, 80333 Munich, Germany. trixler@lmu.de
authors.forename: Frank
authors.initials: F
authors.lastname: Trixler
authors.forename: Thomas
authors.initials: T
authors.lastname: Markert
authors.forename: Markus
authors.initials: M
authors.lastname: Lackinger
authors.forename: Ferdinand
authors.initials: F
authors.lastname: Jamitzky
authors.forename: Wolfgang M
authors.initials: WM
authors.lastname: Heckl