Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Interfaces and Thin Films II

CPP 16.2: Vortrag

Dienstag, 1. April 2014, 09:45–10:00, ZEU 114

Electrostatic nanotemplates: A universal platform for controlled hierarchical particle-deposition. — •Tom Wagner, Larisa Tsarkova, and Alexander Böker — Chair of Macromolecular Materials and Surfaces / Interactive Materials Research DWI an der RWTH Aachen e.V.

We target nanoscopically functionalized surfaces with potential applications in catalysis, circuitry, molecule-recognition and optoelectronics. Nanocomposite templates with topographically and chemically structured patterns have been prepared using a physicochemical bottom-up technique. As a basic nanopattern we use thin films of microphase separated diblock copolymers, aligned by the application of an electric field. The introduction of positive charges exclusively into one particular block is achieved via inter/intra molecular crosslinking, providing a manifold usable electrostatic nanotemplate. Further, microcontact printing and dipcoating processes allow the selective adsorption of negatively charged nanoparticles, proteins and polyelectrolytes, in order to obtain periodic superstructures. In the course of structuring, the degree of crosslinking (charge-density) as well as the elemental composition of precursors and of the final composites has been monitored by attenuated total reflection infrared spectroscopy (ATR-IR) and by x-ray photoelectron spectroscopy (XPS). AFM- and FESEM-measurements have been used to characterize the topography and particle-arrangement at the composite surface. X-ray reflectivity (XRR) measurements provided information on the inner structure of the film.