On the alignment of a cylindrical block copolymer: a time-resolved and 3-dimensional SFM study
On the alignment of a cylindrical block copolymer: a time-resolved and 3-dimensional SFM study
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DOI：
10.1039/c1sm06531a
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发表时间：
2012-01
期刊：
影响因子：
3.4
通讯作者：
Clemens Liedel;M. Hund;V. Olszowka;A. Böker
中科院分区：
文献类型：
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作者：
Clemens Liedel;M. Hund;V. Olszowka;A. Böker
在组合的准原位扫描力显微镜研究中，我们密切追踪了暴露于高电场的聚（苯乙烯）-b-聚（2-乙烯基吡啶）-b-聚（甲基丙烯酸叔丁酯）三嵌段三元共聚物的聚合物薄膜的排列过程。面内场和溶剂蒸气。我们的实验表明，在这种三块体的多孔板结构形成的核心-壳圆柱形结构的基础。此外，我们观察到在高电场（6-15 V μm−1）存在下溶剂蒸气退火的对准过程中出现的六方超结构。电场诱导的重取向包括断裂生长机制和六方晶格的旋转。我们用准原位SFM纳米层析术重建了对准微区的3D结构。所获得的三维重建导致在穿孔薄片和圆柱相之间的边界区域的聚合物膜的行为的详细了解。结合时间分辨的SFM数据集与三维重建，我们提出了一个模型的基础上的六角形穿孔薄板的聚合物圆柱体的重排。一维排列的核壳圆柱体可以形成电隔离纳米线的基础，一旦圆柱体芯被金属化。
In a combined quasi in situscanning force microscopy study we close trace the alignment process of thin polymer films of poly(styrene)-b-poly(2-vinylpyridine)-b-poly(tert-butyl methacrylate) triblock terpolymer exposed to a high electric in-plane field and solvent vapor. Our experiments show that in this triblock terpolymer a perforated lamella structure forms the basis for the core–shell cylindrical structure. Further we observe a hexagonal superstructure during the alignment process that occurs with solvent vapor annealing in the presence of a high electric field (6–15 V μm−1). The electric field induced reorientation includes a rupture-and-growth mechanism and the rotation of the hexagonal lattice. We reconstruct the 3D-structure of the aligned microdomains with quasi in situSFM nanotomography. The gained 3D reconstructions lead to a detailed understanding of the polymer film behavior in the border region between perforated lamella and the cylindrical phase. Combining time-resolved SFM datasets with 3D reconstructions, we present a model for the rearrangement of the polymer cylinders on the basis of a hexagonally perforated lamella. One-dimensionally aligned core–shell cylinders could form the basis for electrically isolated nanowires once the cylinder core is metalized.