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arXiv 0904.0176cond-mat.mtrl-scicond-mat.stat-mech
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嵌段共聚物-纳米粒子复合材料的自组装模型

Modeling self-assembly of diblock copolymer-nanoparticle composites

Fabio D. A. Aarao Reis

摘要:

提出了一种用于二嵌段共聚物(DBCPs)/纳米粒子(NP)自组装体系的胞动力学方法,研究了扩散系数依赖于链构型的纳米粒子与DBCPs相互作用的微区分离.增加NP浓度减慢域分离,但匹配NP扩散长度和层状尺寸的DBCP减少了这种效果。该模型还解释了不同的纳米复合材料的功能,如由NP诱导的形态转变,在一个单一的样品中的层状和六边形图案的共存和峰值NP密度分布在整个平行域。

英文摘要:

A cell dynamics method for domain separation of diblock copolymers (DBCPs) interacting with nanoparticles (NPs) whose diffusion coefficients depend on chain configuration is proposed for self-assembly of DBCP/NP composites. Increasing NP concentration slows down domain separation, but matching NP diffusion lengths and lamellar size of DBCPs reduces this effect. The model also explains features of different nanocomposites, such as morphological transitions induced by NPs, the coexistence of lamellar and hexagonal patterns in a single sample and peaked NP density profiles across the parallel domains.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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