Effect of structural anisotropy on the coarsening kinetics of diblock copolymer striped patterns

被引：69

作者：

Ruiz, R. ^{[1
]}

Bosworth, J. K. ^{[2
]}

Black, C. T. ^{[1
]}

机构：

[1] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.77.054204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We compare the time evolution of striped pattern correlation lengths for three different poly(styrene-b-methyl methacrylate) (PS-b-PMMA) diblock copolymer materials having comparable molecular diffusion rates. Striped patterns formed from cylindrical-phase materials coarsen with enhanced growth exponents and have reduced disclination diffusion activation energies as compared to striped patterns formed from smectic A lamellar-phase materials. The observed differences stem from distinct topological constraints in cylindrical (columnar) and lamellar (SmA) striped patterns. Cylindrical domains create a channel for layer breaking without molecule interdiffusion, facilitating an enhanced rate of pattern coarsening and reducing the disclination diffusion activation energy.

引用

页数：5

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