Phase coherence upon heating in diblock copolymer films

J. Cho, K. Shin, K. S. Cho, Y. S. Seo, S. K. Satija, D. Y. Ryu, J. K. Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Phase coherence behavior in thin films of a diblock copolymer that exhibits microphase separation upon heating in the bulk has been analyzed through a proper mean-field free energy functional based on a compressible random-phase approximation theory. Phase coherent profiles at equilibrium and their decay lengths were obtained analytically for those copolymer films. Taking deuterated polystyrene-b-poly(n-propyl methacrylate) as a model system, molecular parameters characterizing the copolymer were shown to yield the growing tendency of surface segregated or phase coherent profiles upon heating. Neutron reflectivity measurements were performed for the copolymer films to be compared with theory. Phase coherence prior to bulk ordering temperatures and subsequent decay lengths observed for the given system were shown to be in agreement with theory.

Original languageEnglish
Pages (from-to)955-962
Number of pages8
JournalMacromolecules
Volume41
Issue number3
DOIs
Publication statusPublished - 2008 Feb 12

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Phase coherence upon heating in diblock copolymer films'. Together they form a unique fingerprint.

  • Cite this

    Cho, J., Shin, K., Cho, K. S., Seo, Y. S., Satija, S. K., Ryu, D. Y., & Kim, J. K. (2008). Phase coherence upon heating in diblock copolymer films. Macromolecules, 41(3), 955-962. https://doi.org/10.1021/ma071604r