Controllable nanostructural transitions in grafted nanoparticle-block copolymer composites
Controllable nanostructural transitions in grafted nanoparticle-block copolymer composites
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DOI：
10.1007/s12274-010-1039-8
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发表时间：
2010-04
期刊：
影响因子：
9.9
通讯作者：
Guangkui Xu;Xi-Qiao Feng;Shou-wen Yu
中科院分区：
文献类型：
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作者：
Guangkui Xu;Xi-Qiao Feng;Shou-wen Yu
我们报告了一个理论研究的自组装纳米结构的聚合物接枝的纳米粒子在嵌段共聚物和探索潜在的物理机制，采用自洽场方法。通过改变接枝聚合物的颗粒浓度或链长和密度，不仅可以产生各种有序形态（例如，层状或六方堆积图案），而且还控制纳米颗粒在共聚物界面或单嵌段域中心的位置。我们在这里报告的纳米结构转变主要归因于熵和焓之间的竞争。
We report a theoretical investigation of self-assembled nanostructures of polymer-grafted nanoparticles in a block copolymer and explore underlying physical mechanisms by employing the self-consistent field method. By varying the particle concentration or the chain length and density of the grafted polymer, one can not only create various ordered morphologies (e.g., lamellar or hexagonally packed patterns) but also control the positions of nanoparticles either at the copolymer interfaces or in the center of one-block domains. The nanostructural transitions we here report are mainly attributed to the competition between entropy and enthalpy.