Web Release Date: November 2,
Moiré Patterns in Superimposed Nanoporous Thin Films Derived from Block-Copolymer Assemblies
and
Leibniz Institute of Polymer Research Dresden, D-01069 Dresden, Germany, University of Sydney, School of Physics, A28, The University of Sydney, NSW 2006, Australia, and Technical University of Dresden, Triebenberg Lab, D 01062 Dresden, Germany
Received July 28, 2007
Revised October 21, 2007
Abstract:
Nanoscale rotation moiré patterns are observed in double-layer nanoporous thin films produced with use of block-copolymer self-assembly.
Periodic hexagonal moiré superstructures appear when the films possessing long-range order are superimposed at small misorientation
angles. Overlapping films misoriented by angles close to 30
generate aperiodic quasi-crystal-like superstructures with 5-fold symmetries.
The stacking of the disordered nanoporous films produces labyrinth-like patterns. Block-copolymer moiré superstructures are promising as
nanolithography masks with controllable morphology and periodicity.
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