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Nikhila Mahadevapuram, Joseph Strzalka and Gila E. Stein Grazing-incidence transmission small angle X-ray scattering from thin films of block copolymers Journal of Polymer Science Part B: Polymer Physics 51

Version of Record online: 13 FEB 2013 | DOI: 10.1002/polb.23261

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Thin films of lamellar copolymers are popular systems for low-cost nanolithography. To be useful as nanoscale templates, the domains must be oriented perpendicular to the substrate. This work reports a simple method to detect out-of-plane disorder based on grazing-incidence transmission small angle X-ray scattering. Scattering data are analyzed with the Born approximation to quantify the distribution of lamellar persistence lengths throughout the film thickness. These films are characterized by a large population of buried defects.

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