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O: Fachverband Oberflächenphysik

O 16: Organic, polymeric, biomolecular films - also with adsorbates

O 16.7: Vortrag

Montag, 22. März 2010, 16:30–16:45, H46

One- and Two-dimensional Polyamide Films by Vapor Deposition Polymerization — •Christoph H. Schmitz, Julian Ikonomov, and Moritz Sokolowski — Institut für Physikalische und Theoretische Chemie, Universität Bonn, Germany

Long-range ordered structures on surfaces are mainly based on weak adsorbate-adsorbate interactions, such as van der Waals-forces, dipole interactions and hydrogen bonds. Though, technical applications (e.g., coatings, sensors, catalysis) require more robust and durable layers, which may be realized by covalent networks on the surface.

We herein report on the formation of covalently interlinked structures of a polyamide via condensation polymerization directly on the Ag(111) surface at room-temperature. The vapor deposition polymerization technique was combined with ultra-high vacuum preparation methods to obtain polymer monolayers. Depending on the symmetry (i.e. the substitution pattern) of the deposited aromatic amine and acid chloride monomers, one- or two-dimensional polymers can be prepared, which are stable at elevated temperatures up to 620 K. The structures have been characterized by variable temperature scanning tunneling microscopy.

Funded by DFG through SFB 624