Highly Oriented and Aligned Line Patterns of Block Copolymer over Macroscopic Areas

ORAL

Abstract

We describe a novel process to prepare highly oriented and aligned line patterns over arbitrarily large surface areas without the use of photolithography, e-beam lithography, or other process used to chemically or topographically pattern a surface. Thin films of cylinder-forming PS-b-PEO were spin- coated onto the faceted surface of either hard (sapphire) or flexible (PBT) surfaces, and then exposed to THF and water. Scanning force microscopy demonstrated that highly aligned PEO cylindrical microdomains oriented parallel to the surface and normal to the surface facets were obtained over the entire surface. Grazing incidence small angle x-ray scattering (GI- SAXS) and 2D transmission SAXS were performed to characterize the ordering on the nanoscopic level over macroscopic length scales. X-ray results indicated that this film consisted of highly aligned and oriented cylindrical microdomains with no grains or misorientations over large areas owing to the ability of the faceted surfaces to direct the assembly of the block copolymer.

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Authors

  • Sung Woo Hong

    Department of Polymer Science and Engineering University of Massachusetts Amherst, University of Massachusetts, Amherrst

  • Dong Hyun Lee

    Department of Polymer Science and Engineering University of Massachusetts Amherst, University of Massachusettes, Amherst

  • Soojin Park

    School of Nano Bio Chemical Engineering Ulsan National Institute of Science and Technology, Ulsan National Institute of Science and Technology

  • Ting Xu

    Department of Materials Science and Engineering / Chemistry University of California Berkeley, Department of Materials Science and Engineering, UC Berkeley, UC Berkeley

  • Thomas Russell

    University of Massachusetts Amherst, Univ. Massachusetts Amherst, Dept. of Polymer Sci. Eng., University of Massachusetts, Polymer Science and Engineering Department, University of Massachusetts Amherst, Department of Polymer Science and Engineering University of Massachusetts Amherst, University of Massachusetts, Amherst, University of Massuchusetts at Amherst, Department of Polymer Science and Engineering, University of Massachusetts Amherst, University of Massachusetts-Amherst, Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Polymer Science and Engineering Department, University of Massachusetts-Amherst