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One-step synthesis of titania nanoparticles from PS-P4VP diblock copolymer solution

机译:从PS-P4VP二嵌段共聚物溶液一步合成二氧化钛纳米粒子

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摘要

Polymeric films containing titania nanoparticles have potential as dielectric films for flexible electronic applications. For this purpose, the nanoparticles must be homogeneously distributed. Self-assembly is emerging as a neat, elegant method for fabricating such nanostructured hybrid materials with well-distributed nanoparticles. In this work, we report a micellar solution approach for the assembly of copolymer-titanium precursor nanostructures in which titania nanoparticles were synthesized. The ratio of the amount of titanium precursor, titanium isopropoxide, to the blocks forming the micellar core, poly(4-vinylpyridine), was found to play a key role in controlling film morphology. A sphere-to-ribbon transition was observed when the amount of titanium isopropoxide was increased. The thin film morphology can be tuned using the precursor-copolymer interaction rather than just the polymer-polymer interaction or the polymer-solution interaction. This method provides yet another way to control the morphology of nanostructures.
机译:包含二氧化钛纳米粒子的聚合物薄膜具有作为柔性电子应用介电薄膜的潜力。为此,纳米颗粒必须均匀分布。自组装作为一种整齐,优雅的方法正在兴起,用于制造具有分布均匀的纳米粒子的纳米结构混合材料。在这项工作中,我们报告了一种胶束溶液方法,用于组装其中合成了二氧化钛纳米颗粒的共聚物-钛前体纳米结构。发现钛前体异丙醇钛的量与形成胶束核聚(4-乙烯基吡啶)的嵌段的比例在控制膜形态中起关键作用。当异丙醇钛的量增加时,观察到球形到色带的转变。可以使用前体-共聚物相互作用而不只是聚合物-聚合物相互作用或聚合物-溶液相互作用来调节薄膜的形态。该方法提供了另一种控制纳米结构形态的方法。

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