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Long-Range Lateral Correlation between Self-Assembled Domains of Fluorocarbon-Hydrocarbon Tetrablocks by Quantitative GISAXS |
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| Authors: | Dr Wasim Abuillan Dr Mariam Veschgini Salomé Mielke Dr Akihisa Yamamoto Xianhe Liu Dr Oleg Konovalov Prof Dr Marie Pierre Krafft Prof Dr Motomu Tanaka |
| Institution: | 1. Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D-69120 Heidelberg Germany
Current address: Institute of Industrial Science, The University of Tokyo, 153–0041 Tokyo, Japan These Authors contributed equally to this work.;2. Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D-69120 Heidelberg Germany These Authors contributed equally to this work.;3. Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D-69120 Heidelberg Germany;4. Center for Integrative Medicine and Physics, I, nstitute for Advanced Study, Kyoto University, 606-8501 Kyoto, Japan;5. Institut Charles Sadron (CNRS UPR 22), University of Strasbourg, 23 rue du Loess, F-67034 Strasbourg Cedex, France;6. European Synchrotron Radiation Facility (ESRF), Grenoble Cedex 9, 38053 France |
| Abstract: | The structure and lateral correlation of fluorocarbon-hydrocarbon tetrablock di(F10Hm) domains at the air/water interface have been determined by quantitative analysis of grazing incidence small-angle X-ray scattering (GISAXS) data. The measured GISAXS signals can be well represented by the full calculation of the form and structure factors. The form factor suggests that di(F10Hm) domains take a hemiellipsoid shape. Both major and minor axes of the hemiellipsoids monotonically increased in response to the elongation of the hydrocarbon blocks, which can be explained by the concominant increase in van der Waals interaction. The structure factor calculated from the GISAXS signals suggests that the domains take an orthorhombic lattice. Remarkably, the lateral correlation can reach over a distance that is more than 14 times longer than the distance to the nearest neighbors. Our data suggest that quantitative GISAXS enables the optimal design of mesoscopic self-assemblies at the air/water interface by fine-tuning of the structures of molecular building blocks. |
| Keywords: | air/water interface fluorinated alkanes grazing-incidence X-ray scattering self-assembly tetrablocks |