Self-assembled hydrophobic surface generated from a helical nanofilament (B4) liquid crystal phase

Hanim Kim, Youngwoo Yi, Dong Chen, Eva Korblova, David M. Walba, Noel A. Clark, Dong Ki Yoon

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Hydrophobic air/liquid crystal (LC) surfaces exhibiting self-assembled dual scale roughness have been made by simple cooling of a bent-core mesogen from its high temperature isotropic melt through two liquid crystal phases. The transition to the fluid smectic B2 phase generates micron-scale toric focal conic domains (TFCDs) at the surface. Upon further cooling into the hexatic smectic B4 phase these TFCD structures are preserved and become textured by the nanometer-sized helical nanofilaments (HNFs) of the B4. The resulting TFCD/HNF surface is hydrophobic and shows clear evidence for surface tension reduction characteristic of dual-scale roughness, suggesting a simple self-assembly-based approach to low surface tension surfaces using LC morphology.

Original languageEnglish (US)
Pages (from-to)2793-2797
Number of pages5
JournalSoft Matter
Volume9
Issue number10
DOIs
StatePublished - Mar 14 2013

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