Defect-free hexagonal patterns formed by AB diblock copolymers under triangular confinement
Defect-free hexagonal patterns formed by AB diblock copolymers under triangular confinement
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AB二嵌段共聚物在三角形约束下形成的无缺陷六边形图案
DOI:
10.1016/j.polymer.2019.01.032
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发表时间:
2019-03
期刊:
影响因子:
4.6
通讯作者:
Li Weihua
中科院分区:
文献类型:
--
作者:
Xia Yueming;Li Weihua
The self-assembly of a hexagonal cylinder-forming diblock copolymer melt under the hexagonal confinement provides a useful method for the fabrication of defect-free hexagonal patterns. However, the validity of this method depends on the commensurability of the hexagonal size to the domain spacing. Here we turn to another lateral confinement whose shape adapts to the hexagonal lattice, i.e. the regular triangle. First, we attempted to verify that the perfect hexagonal patterns are exclusively the thermodynamic stable morphologies in the triangles with whatever sizes using the self-consistent field theory (SCFT). Then, we simulate the annealing kinetics of the confined melt using the SCFT iteration process. We find that a small number of defects are usually formed in a large triangle even with a commensurate size to the domain spacing. Finally, we propose a multi-step annealing process, where the perfect hexagonal patterns are yielded via a heterogenous nucleation process. Importantly, the achievement of the perfect hexagonal patterns does not exhibit a size-incommensurability issue with the triangles, and thus could become a promising nanolithography scheme.
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DOI:
10.1063/1.2740633
发表时间:
2007-06
期刊:
The Journal of chemical physics
影响因子:
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15
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DOI:
10.1063/1.2735626
发表时间:
2007-05
期刊:
The Journal of chemical physics
影响因子:
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