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024 7 _ |2 DOI
|a 10.1107/S0021889810053823
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041 _ _ |a eng
082 _ _ |a 540
084 _ _ |2 WoS
|a Crystallography
100 1 _ |0 P:(DE-Juel1)VDB7313
|a Busch, P.
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245 _ _ |a Debye-Scherrer rings from block copolymer films with power-like order
260 _ _ |a Copenhagen
|b Munksgaard
|c 2011
300 _ _ |a 370 - 379
336 7 _ |a Journal Article
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440 _ 0 |0 3041
|a Journal of Applied Crystallography
|v 44
|x 0021-8898
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500 _ _ |a CHESS is a national user facility supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under award No. DMR-0225180. We thank Sita Krishnan for the preparation of the semifluorinated diblock copolymer sample. PMB acknowledges financial support by the Deutsche Forschungsgemeinschaft in project No. MU1487/6.
520 _ _ |a The powder-like orientation of lamellar domains in thin films of the diblock copolymer polystyrene-block-poly(methyl methacrylate) is investigated using grazing-incidence small-angle X-ray scattering (GISAXS) and grazing-incidence small-angle neutron scattering (GISANS). Conventional monochromatic GISANS and GISAXS measurements are compared with neutron time-of-flight GISANS. For angles of incidence and exit larger than the critical angle of total external reflection of the polymer, Debye-Scherrer rings are observed. The position of the Debye-Scherrer rings is described quantitatively based on a reduced version of the distorted-wave Born approximation. A strong distortion of the ring shape is caused by refraction and reflections from the film interfaces. Close to the critical angle, the ring shape collapses into a banana shape.
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|a grazing-incidence small-angle scattering
653 2 0 |2 Author
|a GISANS
653 2 0 |2 Author
|a GISAXS
653 2 0 |2 Author
|a powder diffraction
653 2 0 |2 Author
|a distorted-wave Born approximation
653 2 0 |2 Author
|a thin films
653 2 0 |2 Author
|a diblock copolymer
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|a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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693 _ _ |0 EXP:(DE-MLZ)REFSANS-20140101
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|e REFSANS: Horizontal TOF Reflectometer with GISANS option
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700 1 _ |0 P:(DE-HGF)0
|a Rauscher, M.
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700 1 _ |0 P:(DE-HGF)0
|a Moulin, J.-F.
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700 1 _ |0 P:(DE-HGF)0
|a Müller-Buschbaum, P.
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856 7 _ |u http://dx.doi.org/10.1107/S0021889810053823
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