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Orienting semiconducting polymers (SCPs) using solution-processable techniques for organic electronic devices is essential for realizing a printable electronics device. Preparation of oriented films on liquid substrates and transferring on actual device substrate offers many advantages, including layer-by-layer coating, independent control of morphology, freedom to choose substrates, and device geometry. The floating films transfer method (FTM) has emerged as a unique method to prepare oriented films of SCP using solution processing. Here, we review recent progress in this method from the viewpoint of improvement in FTM to orient SCPs and their anisotropy in organic field effect transistors. In addition, the use of FTM films in sensing applications is also reviewed.

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Although matching effects in superconducting anti-dot arrays have been studied extensively through magneto-resistance oscillations, these investigations have been restricted to a very narrow temperature window close to the superconducting transition. Here we report a "two coil" mutual inductance technique, which allows the study of this phenomenon deep in the superconducting state, through a direct measurement of the magnetic field variation of the shielding response. We demonstrate how this technique can be used to resolve outstanding issues on the origin of matching effects in superconducting thin films with periodic array of holes grown on anodized alumina membranes.