Phase Diagram of Diblock Copolymers Confined in Thin Films

被引：109

作者：

Li, Weihua ^{[1
]}

Liu, Meijiao ^{[1
]}

Qiu, Feng ^{[1
]}

Shi, An-Chang ^{[2
]}

机构：

[1] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

[2] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2013年 / 117卷 / 17期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划); 加拿大自然科学与工程研究理事会;

关键词：

MONTE-CARLO SIMULATIONS; ASYMMETRIC BLOCK-COPOLYMERS; 2 HOMOGENEOUS SURFACES; TRIBLOCK COPOLYMERS; CYLINDRICAL PHASE; FIELD THEORY; TRANSITIONS; MICROSTRUCTURES; MICRODOMAINS; LITHOGRAPHY;

D O I：

10.1021/jp309546q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase behaviors of diblock copolymers confined in thin films with two identical preferential surfaces are investigated using the self-consistent field theory. Around 20 morphologies, including centrosymmetric and non-centrosymmetric ones, are considered to construct the two-dimensional phase diagram with respect to the volume fraction and the film thickness, while the interaction parameter chi N and the surface preferences are fixed. When these morphologies are classified into four categories of ordered phases-sphere, cylinder, perforated lamella (corresponding to gyroid phase in bulk), and lamella-the phase diagram directly reveals the impact of the film confinement on the order-order transitions as a function of volume fraction via the comparisons to those in bulk. Our results also provide a comprehensive understanding over the dependence of the structure formations on the film thickness for each volume fraction.

引用

页码：5280 / 5288

页数：9

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