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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 31: Poster: Polymer Dynamics

CPP 31.5: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster C

Stimuli Responsive Polymer Carpets — •Ihsan Amin¹, Marin Steenackers², Ning Zhang², André Beyer¹, Rainer Jordan^2,3, and Armin Gölzhäuser¹ — ¹Physik supramolekularer Systeme, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld, Germany — ²Wacker Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany — ³Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany

We developed an innovative strategy to fabricate freestanding polymeric membranes. An experimentally very easy method has been employed, by combining nanosheets and self-initiated photografting and photopolymerization (SIPGP). The composite films consist of a 1 nm thin crosslinked monolayer of biphenylthiol providing outstanding mechanical properties to the layer on which a soft and stimuli responsive 10-300 nm thick polymer brush layer is grafted, forming so-called polymer carpets. These polymer carpets exhibit remarkable properties (optical, wetting) combining extreme thinness, mechanical stability, robustness, flexibility and unprecedented chemical sensitivity. The membrane thickness as well as its mechanical and chemical properties can be tuned precisely by varying the monomer and polymerization time. Moreover, polymer carpet layers buckle and unbuckle reversibly by applying an external (chemical) stimulus. This unprecedented reversible and fast conformational change is visible with the naked eye and could be applied for the development of new and advanced sensors, displays and micromechanical systems.