title: Hierarchy of adhesion forces in patterns of photoreactive surface layers.
abstract: Precise control of surface properties including electrical characteristics, wettability, and friction is a prerequisite for manufacturing modern organic electronic devices. The successful combination of bottom up approaches for aligning and orienting the molecules and top down techniques to structure the substrate on the nano- and micrometer scale allows the cost efficient fabrication and integration of future organic light emitting diodes and organic thin film transistors. One possibility for the top down patterning of a surface is to utilize different surface free energies or wetting properties of a functional group. Here, we used friction force microscopy (FFM) to reveal chemical patterns inscribed by a photolithographic process into a photosensitive surface layer. FFM allowed the simultaneous visualization of at least three different chemical surface terminations. The underlying mechanism is related to changes in the chemical interaction between probe and film surface.
authors.affiliation: Institute of Physics, University of Leoben, 8700 Leoben, Austria.
authors.forename: Gregor
authors.initials: G
authors.lastname: Hlawacek
authors.forename: Quan
authors.initials: Q
authors.lastname: Shen
authors.forename: Christian
authors.initials: C
authors.lastname: Teichert
authors.forename: Alexandra
authors.initials: A
authors.lastname: Lex
authors.forename: Gregor
authors.initials: G
authors.lastname: Trimmel
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kern