Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes

Christopher Harrison, Paul M. Chaikin, David A. Huse, Richard A. Register, Douglas H. Adamson, Abishai Daniel, E. Huang, P. Mansky, T. P. Russell, Craig J. Hawker, David A. Egolf, Ilarion V. Melnikov, Eberhard Bodenschatz

    Research output: Contribution to journalArticle

    Abstract

    We study the range of orientational order of a single layer of cylindrical block copolymer microdomains annealed on several types of substrates. The orientational persistence length or nematic correlation length (ξ) is evaluated using recently developed imaging and analysis methods to measure the grain size of the block copolymer microdomains. We show that the substrate can lower ξ for block copolymers with a majority component that interacts strongly with the substrate, but this can be mitigated by attaching a buffer layer of polystyrene brushes to the substrate. In addition, we show that, for a block copolymer where the block that strongly interacts with the substrate is the minority component, the microdomain correlation length does not increase when substrates are treated with this buffer layer. We suggest that in this case the brushes do not increase ξ not only because of the lower volume fraction of the strongly interacting component but also because there are block copolymer wetting layers at the free and substrate interfaces that decouple the microdomains from the substrate in a similar manner as the polystyrene brushes.

    Original languageEnglish (US)
    Pages (from-to)857-865
    Number of pages9
    JournalMacromolecules
    Volume33
    Issue number3
    DOIs
    StatePublished - Feb 8 2000

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    Brushes
    Buffer layers
    Block copolymers
    Polymers
    Substrates
    Polystyrenes
    Wetting
    Volume fraction
    Imaging techniques

    ASJC Scopus subject areas

    • Materials Chemistry

    Cite this

    Harrison, C., Chaikin, P. M., Huse, D. A., Register, R. A., Adamson, D. H., Daniel, A., ... Bodenschatz, E. (2000). Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes. Macromolecules, 33(3), 857-865. https://doi.org/10.1021/ma991551g

    Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes. / Harrison, Christopher; Chaikin, Paul M.; Huse, David A.; Register, Richard A.; Adamson, Douglas H.; Daniel, Abishai; Huang, E.; Mansky, P.; Russell, T. P.; Hawker, Craig J.; Egolf, David A.; Melnikov, Ilarion V.; Bodenschatz, Eberhard.

    In: Macromolecules, Vol. 33, No. 3, 08.02.2000, p. 857-865.

    Research output: Contribution to journalArticle

    Harrison, C, Chaikin, PM, Huse, DA, Register, RA, Adamson, DH, Daniel, A, Huang, E, Mansky, P, Russell, TP, Hawker, CJ, Egolf, DA, Melnikov, IV & Bodenschatz, E 2000, 'Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes', Macromolecules, vol. 33, no. 3, pp. 857-865. https://doi.org/10.1021/ma991551g
    Harrison C, Chaikin PM, Huse DA, Register RA, Adamson DH, Daniel A et al. Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes. Macromolecules. 2000 Feb 8;33(3):857-865. https://doi.org/10.1021/ma991551g
    Harrison, Christopher ; Chaikin, Paul M. ; Huse, David A. ; Register, Richard A. ; Adamson, Douglas H. ; Daniel, Abishai ; Huang, E. ; Mansky, P. ; Russell, T. P. ; Hawker, Craig J. ; Egolf, David A. ; Melnikov, Ilarion V. ; Bodenschatz, Eberhard. / Reducing substrate pinning of block copolymer microdomains with a buffer layer of polymer brushes. In: Macromolecules. 2000 ; Vol. 33, No. 3. pp. 857-865.
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