Merekalov Alexey S, Derikov Yaroslav I, Artemov Vladimir V, Ezhov Alexander A, Kudryavtsev Yaroslav V
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia.
Shubnikov Institute of Crystallography, Federal Scientific Research Centre "Crystallography and Photonics", Russian Academy of Sciences, 119333 Moscow, Russia.
Polymers (Basel). 2021 Nov 16;13(22):3959. doi: 10.3390/polym13223959.
Morphological transition between hexagonal and lamellar patterns in thin polystyrene--poly(4-vinyl pyridine) films simultaneously exposed to a strong in-plane electric field and saturated solvent vapor is studied with atomic force and scanning electron microscopy. In these conditions, standing cylinders made of 4-vinyl pyridine blocks arrange into threads up to tens of microns long along the field direction and then partially merge into standing lamellas. In the course of rearrangement, the copolymer remains strongly segregated, with the minor component domains keeping connectivity between the film surfaces. The ordering tendency becomes more pronounced if the cylinders are doped with Au nanorods, which can increase their dielectric permittivity. Non-selective chloroform vapor works particularly well, though it causes partial etching of the indium tin oxide cathode. On the contrary, 1,4-dioxane vapor selective to polystyrene matrix does not allow for any morphological changes.
利用原子力显微镜和扫描电子显微镜研究了在同时暴露于强面内电场和饱和溶剂蒸汽的薄聚苯乙烯 - 聚（4 - 乙烯基吡啶）薄膜中，六方和层状图案之间的形态转变。在这些条件下，由4 - 乙烯基吡啶嵌段制成的立构圆柱沿着场方向排列成长达数十微米的线，然后部分合并成立构薄片。在重排过程中，共聚物保持强烈的相分离，次要组分域在薄膜表面之间保持连通性。如果圆柱掺杂有金纳米棒，其有序化趋势会变得更加明显，这可以增加它们的介电常数。非选择性氯仿蒸汽效果特别好，尽管它会导致铟锡氧化物阴极的部分蚀刻。相反，对聚苯乙烯基质有选择性的1,4 - 二氧六环蒸汽不会引起任何形态变化。
