Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: INTERNAL SYMPOSIUM Scattering Experiments II

CPP 11.5: Talk

Tuesday, March 27, 2007, 15:15–15:30, H37

Nanotemplate fabrication and macroscopic alignment of nanoscale domains using self-organized diblock copolymers — •Denis Korolkov, Peter Busch, Emmanuel Kentzinger, Lutz Willner, and Thomas Brueckel — Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425, Jülich

Fabrication of macroscopic domains of periodic nanoscale structures using self-organizing systems promises to be a simple and low cost method with potential to produce high-density arrays of magnetic devices [ 1 ]. A block-copolymer can self-assemble into microphase separated domains with a spacing of 10-100 nm which strongly depends on molecular weight, segment size, and the strength of interaction between the blocks. Without further constraint, the domains have no preferred orientation and form a disordered "fingerprint" structure.

In this study self-organization of polystyrene-polybutadiene (dPS-PB) diblock copolymer with various thicknesses and molecular weights was investigated. Using pre-structured Si wafer with gratings[ 2 ] of 1µ m period and depth of 60 nm we were able to achieve a macroscopic alignment of polymer domains.

Structural characterization, in particular the degree of long-range order was done by combining a surface-sensitive technique like atomic force microscope (AFM) with grazing incidence small angle scattering (GISAS).

[ 1] I. W. Hamley Nanotechnology 14 (2003) R39-R54

[ 2] D. Sundrani, S.B. Darling, S.J. Sibener Nano Lett., Vol. 4, No. 2, 2004