Substrate interaction effects on order to disorder transition behavior in block copolymer films

Hyungju Ahn, Yonghoon Lee, Hoyeon Lee, Yoonkeun Kim, Du Yeol Ryu, Byeongdu Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present an overview of the recent progress on the phase transition in the block copolymer (BCP) films in terms of the interfacial interactions effects of the substrates and the χ (Flory-Huggins segmental interaction parameter) effects between the two blocks. For the BCP films thinner than a critical thickness (Lc) above which the transition is independent of film thickness, the order-to-disorder transition (ODT) increased or decreased with decreasing film thickness depending on the interfacial interaction types. The rapid and slow changes in the ODT were attributed to the relative magnitude of enthalpic contribution to χ between two blocks. Interestingly, a periodic amplification in the block composition for the BCP films suppressed the compositional fluctuation in the film geometry, resulting in the ODT shifts from the bulk ODTs above Lc. This effect of the BCP films was more illustrated by the ODT shift effects depending on the strength of the preferential interactions on the substrates.

Original languageEnglish
Pages (from-to)567-573
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume51
Issue number7
DOIs
Publication statusPublished - 2013 Apr 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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