Orientational transitions in symmetric diblock copolymers on rough surfaces

Yoav Tsori, Easan Sivaniah, David Andelman, Takeji Hashimoto

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

A simple model to interpret the orientation transition seen in block copolymers (BCP) systems in contact with rough substrates was described. The amplitude of sinusoidal variation, φ 0, depends on the degree of segregation and vanishes at the order-disorder temperature (ODT). It was found that the accumulated frustration of parallel lamellae leads to their relative instability toward the perpendicular phase. The transition between parallel and perpendicular lamellae is expected to be at q sR ∼ 1 and independent of q 0.

Original languageEnglish
Pages (from-to)7193-7196
Number of pages4
JournalMacromolecules
Volume38
Issue number16
DOIs
StatePublished - 9 Aug 2005

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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