Mesoscopic surface structures in dewetted films of liquid crystalline polymers

Olaf Karthaus, Hiroshi Yabu, Kazuo Akagi, Masatsugu Shimomura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Upon casting from dilute solution, liquid crystalline polyacetylenes and polyesters form mesoscopic dot and line patterns. After annealing in the liquid crystalline phase, the films dewet from the substrate and form isolated micronsize dots and line structures, which exhibit a peculiar surface structure as reveiled by polarizing microscopy and atomic force microscopy. The surface structure consists of micron-size shallow dimples that are a few nanometer in depth. The lateral spacing of the dimples, which arrange in a hexagonallattice, is directly proportional to the thickness of the dot. We propose that the dimple formation is due to a convective instability.

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume364
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

Keywords

  • Convection
  • Dewetting
  • Droplet
  • Hierarchic structure
  • Mesoscopic structure
  • Polyacetylene
  • Polyester

ASJC Scopus subject areas

  • Condensed Matter Physics

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