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Block copolymer morphology formation on topographically complex surfaces: a self-consistent field theoretical study.

Authors
  • Ye, Xianggui
  • Edwards, Brian J
  • Khomami, Bamin
Type
Published Article
Journal
Macromolecular rapid communications
Publication Date
Apr 01, 2014
Volume
35
Issue
7
Pages
702–707
Identifiers
DOI: 10.1002/marc.201300800
PMID: 24470333
Source
Medline
Keywords
License
Unknown

Abstract

A self-consistent field theoretic study is performed to study morphological development of lamellae-forming diblock copolymers on substrates with a well-defined roughness, modeled as trenches of varying depth and width engraved into the substrates. There are three possible lamellar orientations observed: horizontal lamellae, vertical lamellae that are parallel to the trench direction, and vertical lamellae that are perpendicular to the trench direction. Which of these three morphologies formed depends upon the trench width and surface affinity; however, trench depth has a relatively insignificant effect on the morphological development. Therefore, tuning trench width, but not trench depth, should allow for a reduction of the morphological defect density in directed self-assembly of lamellar morphology of diblock copolymers.

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