Shear-Induced Alignment in Thin Films of Spherical Nanodomains


  • We gratefully acknowledge financial support from the National Science Foundation through the Princeton Center for Complex Materials (DMR-0213706). This work utilized processes and device designs developed at the NIST Combinatorial Methods Center in Gaithersburg, MD.


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Large-scale alignment of bilayer block copolymer films by applying in-plane shear is demonstrated. The method eliminates all disclinations and most dislocations from arbitrarily large samples, as evidenced by atomic force microscopy of the microdomain lattice (Figure, left) as well as its Fourier transform (Figure, right). The resulting films can act as ordered nanolithographic templates.