2025/07/04 by Shanshan Yin, Wei Cao, Suo Tu +12 · 1 voice · 1 citation
Chemistry · Materials Science · #Advanced Polymer Synthesis and Characterization #Dendrimers and Hyperbranched Polymers #Polymer crystallization and properties
paper · pdf · doi:10.1002/admi.202500298
openalex publication_date 2025/07/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Abstract Nanostructured hematite (α‐Fe₂O₃) films exhibit significant potential for energy, environmental, and medical applications. In the present work, a large‐scale spray coating deposition method, scanning electron microscopy, and in situ grazing‐incidence small‐angle X‐ray scattering are combined to investigate the structure formation mechanism of pure poly(styrene)‐ b ‐poly(4‐vinyl pyridine) (PS‐ b ‐P4VP) and hybrid PS‐ b ‐P4VP/FeCl₃ films during and after spray deposition. Under the film deposition conditions specified in this experiment, a layered pure PS‐ b ‐P4VP film, a sponge‐like hybrid PS‐ b ‐P4VP/FeCl₃ film, and a porous α‐Fe 2 O 3 film are obtained upon completion of the deposition. The morphological differences between the investigated pure PS‐ b ‐P4VP and hybrid PS‐ b ‐P4VP/FeCl₃ films result from the interplay among the complexation between FeCl₃ and P4VP segments, the crystallization of the P4VP segment, and the surface diffusion of the FeCl 3 species. The findings of this work can offer both experimental and theoretical guidance for designing spray‐deposited block copolymer and hybrid films.