Self-consistent field theory of diblock copolymer melts at patterned surfaces
Self-consistent field theory of diblock copolymer melts at patterned surfaces
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二嵌段共聚物在图案表面熔化的自洽场论
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Muthukumar
中科院分区：
文献类型：
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作者：
D. Petera;M. Muthukumar
本文用自洽场理论研究了嵌段共聚物熔体在两个表面之间的薄膜中的密度分布，其中一个表面具有化学活性图案。温度缓慢降低通过临界点，以获得良好组织的结构。对于强的表面相互作用，对称二嵌段共聚物的层状结构符合表面图案。它们的取向取决于自然体周期L0与表面周期L的比值。对于L0 <$L，薄片相对于表面以角度θ=arcsin L0/L倾斜。对于L0-L，二嵌段在靠近表面处发生扭曲，并且对于厚度大于2个片层周期的膜，必要的表面松弛引起相对于表面的平行取向片层。非常薄的薄膜仍然支持垂直取向。
Self-consistent field theory is used to investigate the density profile of diblock copolymer melts in a thin film confined between two surfaces, one of which carries a chemically active pattern. The temperature is slowly lowered through the critical point in order to obtain well organized structures. For strong surface interactions, the lamellae for symmetric diblock copolymers comply with the surface pattern. Their orientation depends on the ratio of natural bulk period L0 to surface period L. For L0⩽L, the lamellae tilt at an angle θ=arcsin L0/L with respect to the surface. For L0⩾L, the diblocks are distorted close to the surface and the necessary relaxation off the surface induces parallel oriented lamellae with respect to the surface for films thicker than 2 lamellar periods. Very thin films still support the perpendicular orientation.