Nanoporous Thin Films Using Benzocyclobutene-Containing Diblock Copolymers

ORAL

Abstract

Microphase separated diblock copolymer thin films are important in the fields of nano-templating and data storage. Diblock copolymers containing vinyl benzocyclobutene (BCB) moieties were thermally cross-linked to afford chemically and thermally robust nanoporous thin films with hydroxy-functionalized nanopores. The ability for the morphology to resist solvation allows for a wider array of chemical modifications inside the nanoporous channels. Poly[(styrene-r-BCB)-b-lactic acid] (PSBCBLA) was synthesized by a combination of living free radical polymerization and ring-opening polymerization. The PSBCBPLA copolymer used was shown to phase separate into a cylindrical morphology, confirmed by SAXS, with cylinders oriented perpendicular to the substrate, as suggested by AFM and TEM studies. The PSBCB block can be thermally cross-linked at temperatures from 200 C -- 250 C and the PLA block can be easily removed with weak base to give accessible hydroxyl-functionalized nanopores.

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Authors

  • Julie Leiston-Belanger

  • Thomas P. Russell

    • UMASS Amherst
    • University of Massachusetts, Amherst
    • Polymer Science and Engineering Department, University of Massachusetts, Amherst
    • University of Massachusetts-Amherst, Department of Polymer Sciece and Engineering
    • U. of Massachusetts
    • University of Massachusetts
    • Dept. of Polymer Science and Engineering, University of Massachusetts, Amherst
    • University of Massachusetts-Amherst
    • Dept. of Polymer Science and Eng. UMASS - Amherst
    • Polymer Sci. Eng. Univ. of Mass at Amherst

  • Eric Drockenmuller

    • IBM Almaden Research Center

  • Craig Hawker

    • University of California- Santa Barbara