A binary blend of poly(isoprene-block-styrene-block-(2-vinylpyridine)) (ISP) triblock terpolymers, having the same chain length but different compositions, was used to achieve an ordered lattice with 4-fold symmetry of rectangular-shaped rods of poly(isoprene) (I) and poly(2-vinylpyridine) (P). In given conditions, the I and P domains were oriented perpendicularly to the substrate, providing an appealing type of templates for nanopatterning. Thin films were prepared by spin coating, exposed to solvent vapor (providing morphological reorganization), and then characterized by atomic force microscopy, transmission electron microscopy, and grazing-incidence small-angle X-ray scattering. Selective I and P identifications were carried out by AFM and TEM on a model ISP, as well as development of a technique of electronic contrast enhancement to better assign the self-assembly structure in GISAXS.

中文翻译：

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从线性 ABC 嵌段三元共聚物的混合物中获得的具有垂直四方填充矩形棒的薄膜

聚（异戊二烯-嵌段-苯乙烯-嵌段）的二元混合物-(2-vinylpyridine)) (ISP) 三嵌段三元共聚物，具有相同的链长但不同的组成，用于实现具有 4 重对称的矩形棒的聚（异戊二烯）（I）和聚（ 2-乙烯基吡啶）（P）。在给定条件下，I 和 P 结构域垂直于基板定向，为纳米图案化提供了一种吸引人的模板。通过旋涂制备薄膜，暴露于溶剂蒸汽（提供形态重组），然后通过原子力显微镜、透射电子显微镜和掠入射小角 X 射线散射进行表征。通过 AFM 和 TEM 对 ISP 模型进行选择性 I 和 P 识别，并开发了一种电子对比度增强技术，以更好地分配 GISAXS 中的自组装结构。