Biaxial alignment of block copolymer-complex lamellae

Jingbo Wang, Wim H. De Jeu, Maria Speiser, Andreas Kreyes, Ulrich Ziener, David Magerl, Martine Philipp, Peter Müller-Buschbaum, Martin Möller, Ahmed Mourran

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Microphase-separated lamellar block copolymers can be oriented perpendicular to a substrate. The application of this attractive configuration as a template for nanostructure fabrication requires additionally long-range in-plane alignment of the lamella, for which no simple procedures are available. Here we present a convenient solution to this problem by exploiting the combination of supramolecular liquid-crystalline ordering of the block copolymer in combination with PTFE rubbing technology. The mesogenic ligands incorporated in one of the blocks interact with the substrate and control the self-assembly, rendering a vertical orientation of the microdomains. In addition the vertical lamellae orient parallel to the friction-deposited PTFE layer leading to long-range lateral ordering, providing unique new possibilities for block copolymer nanotechnology.

Original languageEnglish
Pages (from-to)1337-1343
Number of pages7
JournalSoft Matter
Volume9
Issue number4
DOIs
StatePublished - 28 Jan 2013

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