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Publication Citation: Microdomain Ordering in Laterally Confined Block Copolymer Thin Films

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Author(s): August W. Bosse; Carlos Garcia-Cervera; Glenn Fredrickson;
Title: Microdomain Ordering in Laterally Confined Block Copolymer Thin Films
Published: November 29, 2007
Abstract: We examine the effects of small-scale, hexagonal, lateral confinement on microdomain ordering in $AB$ diblock copolymer thin films using self-consistent field theory (SCFT) simulations. Specifically, we examine a hexagonal confinement well with side length $L$ approximately equal to five cylindrical microdomain lattice spacings. The commensurability constraints of the small-scale lateral confinement, coupled with surface-induced effects allows the confining well to have a significant effect on the perfection of microdomain order. We identify commensurability windows in $L$ that depend on the segment wall interaction, and the ``temperature'' annealing rate (modeled as a Flory $\chi ~ 1/T$ annealing rate). The effect of added majority-block homopolymer is also explored.
Citation: Macromolecules
Volume: 40
Pages: pp. 9570 - 9581
Keywords: block copolymers,commensurability,lateral confinement,mean-field,self-assembly,simulations,surface-directed ordering,thin films
Research Areas: Polymers, Block copolymer lithography
PDF version: PDF Document Click here to retrieve PDF version of paper (541KB)