Alignment control of self-assembled organosiloxane films derived from alkyloligosiloxane amphiphiles

Jenny Du, Madoka Fukushima, Shigeru Sakamoto, Mikako Sakurai, Takashi Suzuki, Atsushi Shimojima, Hirokatsu Miyata, Cathleen M. Crudden, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Transparent and continuous organosiloxane films with macroscopically oriented mesostructures were prepared by dip-coating a substrate, on which a rubbing-treated polyimide film is formed, with hydrolyzed solutions of oligosiloxane precursors (CnH2n+1Si(OSi(OMe) 3)3). The structure of the films depends on the alkyl chain length of the precursors such that films with two-dimensional (2D) hexagonal and lamellar structures are obtained when n=10 and 16, respectively. In the 2D hexagonal film, the cylindrical organic moieties are aligned perpendicular to the rubbing direction in the plane of the film over the whole film thickness. On the other hand, the lamellar film changes its orientation with increased distance from the substrate surface. While the orientation of the lamellae at the surface of the film is parallel to the film-air interface, they are perpendicularly aligned in the vicinity of the substrate with the layer normal parallel to the rubbing direction. The observed unique orientation of the mesostructures is attributed to the anisotropic hydrophobic interactions between the alkyl chains of the hydrolyzed oligosiloxane molecules and the polymer chains of the polyimide layer oriented by the rubbing treatment.

    Original languageEnglish
    Pages (from-to)13614-13618
    Number of pages5
    JournalLangmuir
    Volume25
    Issue number23
    DOIs
    Publication statusPublished - 2009 Dec 1

    Fingerprint

    Amphiphiles
    alignment
    polyimides
    Polyimides
    Substrates
    Lamellar structures
    lamella
    Chain length
    Film thickness
    coating
    Polymers
    film thickness
    Coatings
    Molecules
    air

    ASJC Scopus subject areas

    • Electrochemistry
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Materials Science(all)
    • Spectroscopy

    Cite this

    Alignment control of self-assembled organosiloxane films derived from alkyloligosiloxane amphiphiles. / Du, Jenny; Fukushima, Madoka; Sakamoto, Shigeru; Sakurai, Mikako; Suzuki, Takashi; Shimojima, Atsushi; Miyata, Hirokatsu; Crudden, Cathleen M.; Kuroda, Kazuyuki.

    In: Langmuir, Vol. 25, No. 23, 01.12.2009, p. 13614-13618.

    Research output: Contribution to journalArticle

    Du, J, Fukushima, M, Sakamoto, S, Sakurai, M, Suzuki, T, Shimojima, A, Miyata, H, Crudden, CM & Kuroda, K 2009, 'Alignment control of self-assembled organosiloxane films derived from alkyloligosiloxane amphiphiles', Langmuir, vol. 25, no. 23, pp. 13614-13618. https://doi.org/10.1021/la901983m
    Du, Jenny ; Fukushima, Madoka ; Sakamoto, Shigeru ; Sakurai, Mikako ; Suzuki, Takashi ; Shimojima, Atsushi ; Miyata, Hirokatsu ; Crudden, Cathleen M. ; Kuroda, Kazuyuki. / Alignment control of self-assembled organosiloxane films derived from alkyloligosiloxane amphiphiles. In: Langmuir. 2009 ; Vol. 25, No. 23. pp. 13614-13618.
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