Hierarchical Self-Assembly of Halogen-Bonded Block Copolymer Complexes into Upright Cylindrical Domains

Roberto Milani, Nikolay Houbenov, Francisco Fernandez-Palacio, Gabriella Cavallo, Alessandro Luzio, Johannes Haataja, Gabriele Giancane, Marco Saccone, Arri Priimägi, Pierangelo Metrangolo, Olli Ikkala

    Research output: Contribution to journalArticleScientificpeer-review

    32 Citations (Scopus)
    63 Downloads (Pure)

    Abstract

    Self-assembly of block copolymers into well-defined, ordered arrangements of chemically distinct domains is a reliable strategy for preparing tailored nanostructures. Microphase separation results from the system, minimizing repulsive interactions between dissimilar blocks and maximizing attractive interactions between similar blocks. Supramolecular methods have also achieved this separation by introducing small-molecule additives binding specifically to one block by noncovalent interactions. Here, we use halogen bonding as a supramolecular tool that directs the hierarchical self-assembly of low-molecular-weight perfluorinated molecules and diblock copolymers. Microphase separation results in a lamellar-within-cylindrical arrangement and promotes upright cylindrical alignment in films upon rapid casting and without further annealing. Such cylindrical domains with internal lamellar self-assemblies can be cleaved by solvent treatment of bulk films, resulting in separated and segmented cylindrical micelles stabilized by halogen-bond-based supramolecular crosslinks. These features, alongside the reversible nature of halogen bonding, provide a robust modular approach for nanofabrication.

    Original languageEnglish
    Pages (from-to)417-426
    Number of pages10
    JournalCheM
    Volume2
    Issue number3
    DOIs
    Publication statusPublished - 9 Mar 2017
    Publication typeA1 Journal article-refereed

    Keywords

    • block copolymers
    • halogen bond
    • hierarchical self-assembly
    • nanofabrication
    • supramolecular complexes

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Biochemistry
    • Environmental Chemistry
    • Materials Chemistry
    • Biochemistry, medical

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