Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Crystallization and Self Assembly I
CPP 8.3: Talk
Monday, March 22, 2010, 11:45–12:00, H48
Gyroid-structured materials via self-assembled copolymer templates — •Maik Scherer1, Pedro Cunha1, Alex Finnemore1, Edward Crossland2, and Ullrich Steiner1 — 1Cavendish Laboratory, University of Cambridge, Cambridge, UK — 2Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
This talk will discuss the nanostructuring of inorganic materials such as titania or single-crystalline calcium carbonate, using porous diblock copolymer thin films with gyroid morphology.
A particularly interesting phase morphology in microphase separated diblock copolymers is the so called double gyroid, where each of the immiscible blocks forms a triply periodic, self-supporting and continuous network or matrix. Together with its high surface area, the gyroid seems to be the perfect three dimensional structure for novel nanodevices.
I will present two approaches for the fabrication of gyroidal thin films employing either thermal annealing of pure PFS-b-PLA polymer or solvent annealing of a binary blend of hPS/PS-b-PI. The removal of one of the polymeric phases yields nanoporous templates. Finally, two examples for the application of these porous films as templates for inorganic materials will be presented: Firstly, the bioinspired nanostructuring of single-crystalline calcite with feature sizes as small as 37 nm. Secondly, the electrochemical deposition of titanium dioxide within the porous polymer films on a transparent, conducting substrate for high efficiency dye-sensitized solar cells.