Layer-by-layer coating of oriented conjugated polymer films towards anisotropic electronics

- Layer-by-layer coating of oriented conjugated polymer thin-film has been successfully demonstrated.
- Polarized absorption and FT-IR spectroscopy revealed the uniaxial orientation of conjugated polymer in the parallel-coated multilayer film.
- X-ray analysis clarified the 3D structural orientation of macromolecules.
- Fine conservation of the oriented film morphology has been clarified in both the upper- and underneath-layers' orientation.

Dynamic casting of floating-film and transferring method for preparing oriented multilayer films of conjugated polymers is reported. This method is based on dynamic casting of a floating-film on liquid substrate to obtain oriented thin-film followed by its transfer on a desired solid substrate. The uniqueness in this method lies in the isolation of casting and coating procedures of oriented films, which enables us to fabricate the oriented multilayer with minimum interlayer interference. It provides a key-technology to build up the organic multi-layered architecture while preserving oriented morphologies. Several types of multilayer films have been prepared and investigated in detail in terms of their film characteristics. The layer-by-layer coating of oriented films demonstrated by this method is found to be a unique feature which overcomes cumbersome procedures in the conventional orientation methods. The coating procedure demonstrated in this study provides a facile methodology to construct anisotropic architectures.

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