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Organic field-effect transistors with a self-doped (SD) polyaniline charge-trapping energy well structure exhibit outstanding nonvolatile memory characteristics. The charges generated by the field-effect operation are effectively stored in the SD poly(o-anthranilic acid) charge-trapping energy well layer so that the present memory transistor performs excellent data writing–reading–erasing functions with highly stable data retention characteristics.

Well-defined and stable nanomicelles (20−30 nm in diameter) were demonstrated for the first time by the self-assembly of amphiphilic brush (comb-like) cyclic and tadpole-shaped copolymers based on a poly(glycidyl ether) backbone. In particular, the brush cyclic topology formed the most compact and most stable nanomicelles with an extremely narrow (pseudo-monodisperse) size distribution, which are unattainable by other conventional means. This study provides a unique opportunity for designing advanced functional high-performance amphiphile materials for micelles and facilitating their applications in various fields.

This study demonstrated that the formation of triazole moieties accompanying with a linker or substituent group(s) having a resonance effect (which can provide a charge stabilization power) by using azide–alkyne click chemistry is a very powerful synthetic route to develop electrical memory polymers with high performances. The memory mode can be further tuned by changing the linker or substituent group(s) in the triazole moiety.

Peptide-mimic poly(n-hexyl isocyanate) (PHIC) with stiff chain characteristics demonstrated to selectively form a well-ordered hexagonal close packing structure with 8₃ helical conformation in the nansocale thin films annealed with carbon disulfide. Moreover, this polymer showed to selectively form a well-ordered multi-bilayer structure with β-sheet conformation in the thin films annealed with toluene. These two self-assembled structures were reversibly transformed by consecutive annealing with carbon disulfide and toluene. These chain conformations and self-assembled structures were confirmed by synchrotron grazing incidence X-ray scattering analysis.

Novel digital memory devices were fabricated with a new photo-patternable polyimide (PI), poly(hexafluoroisopropylidenediphthalimide-4-cinnamoyloxytriphenylamine (6F-HTPA-CI). The finely patterned PI device cells demonstrated excellent programmable nonvolatile memory characteristics in three different modes (unipolar permanent memory, and unipolar and bipolar flash memories). Overall, this photopatternable polymer is very suitable for future energy-efficient, faster speed and high density nonvolatile memory devices in highly integrated systems.

Well-defined aniline-chain-end-functionalized regioregular poly(3–hexylthiophene)s (P3HT-NH₂) have been synthesized on the basis of Grignard metathesis polymerization. The selectivity of monofunctionalization and the high degree of amine functionality (85–92%) were confirmed by MALDI-TOF mass spectroscopy. A block copolymer through ionic interaction was successfully synthesized simply by blending P3HT-NH₂ with carboxy chain-end-functionalized polystyrene. Thermal and optical properties of the block copolymer are investigated by DSC, TGA and UV-vis spectroscopy. The self-assembly behavior of the polymer was observed by AFM showing nanofibril structures with 12–15 nm width.