Pattern formation, nanoporous

The evidence for the formation of a new crystaUine phase is also reinforced by the XRD patterns shown in Fig. 4.4. As can be verified, the methyl methacrylate spheres exhibit some degree of crystallinity. Furthermore, the titania-covered spheres exhibit the same XRD patterns as the uncovered spheres, indicating that the Ti02 coat is amorphous. On the other hand, the nanoporous thiol-functionalized titania-sifica hybrid exhibits a distinct XRD pattern, showing that a new crystaUine phase was formed. By comparison with previously prepared double oxides [13,16] the diffraction peak at 5.5° observed in Fig. 4.2c could be attributed to the 100 diffraction plane of a hexagonal phase. 

F. 2.17 a Schematic representation of the formation of the nanoporous membrane based on smectic liquid crystals, b The chemical structure of the LCs. c Simplified artistic view of the nanopores in the layered network. To visualize the 2D pores the counter ion is not shown and the benzoic acid derivatives are drawn highly ordered, d A free-standing H-bonded polymer network, e TEM of the nanoporous polymer network filled with barium ions, scale bar 20 nm. f X-ray diffraction pattern of the alkaline treated network. Adapted from Ref. [76] by permission of John Wiley Sons Ltd... 

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