Recognition of Multiblock Copolymers on Nanopatterned Surfaces: Insight from Molecular Simulations
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- 作者：Houyang Chen ; Changjun Peng ; Zhencheng Ye ; Honglai Liu ; Ying Hu ; Jianwen Jiang
- 刊名：Langmuir
- 出版年：2007
- 出版时间：February 27, 2007
- 年：2007
- 卷：23
- 期：5
- 页码：2430 - 2436
- 全文大小：270K
- 年卷期：v.23,no.5(February 27, 2007)
- ISSN：1520-5827
文摘
The recognition of multiblock copolymers on nanopatterned surfaces has been investigated by molecular simulations.All the copolymers (AnB12-n)5 are composed of 60 square-well segments, but with various architectures by changingn. Segment density profiles, radii of gyration, pattern transfer parameters, and three adsorption conformations (tail,loop, and train) are examined quantitatively. It is found that the copolymer can recognize the adsorbing stripes onsurface and the surface vicinity. The recognition affinity becomes stronger with increasing the stripe width, theadsorption strength, and the number of adsorbing segments in copolymer chain. From surface to bulk phase, the shapeof copolymer changes from elongated to elliptical, and finally to globular. Among the three adsorption conformations,tail has the greatest average size while train has the smallest. With the increased number of nonadsorbing segments,the average size shows an increase in tail but a decrease in train.