Dynamics of pattern coarsening in a two-dimensional smectic system

被引:171
作者
Harrison, C
Cheng, ZD
Sethuraman, S
Huse, DA
Chaikin, PM
Vega, DA
Sebastian, JM
Register, RA
Adamson, DH
机构
[1] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA
[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[3] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA
[4] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA
[5] Univ Nacl Sur, Dept Phys, RA-8000 Bahia Blanca, Buenos Aires, Argentina
来源
PHYSICAL REVIEW E | 2002年 / 66卷 / 01期
关键词
D O I
10.1103/PhysRevE.66.011706
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We have followed the coarsening dynamics of a single layer of cylindrical block copolymer microdomains in a thin film. This system has the symmetry of a two-dimensional smectic. The orientational correlation length of the microdomains was measured by scanning electron microscopy and found to grow with the average spacing between +/-1/2 disclinations, following a power law xi(2)(t)similar tot(1/4). By tracking disclinations during annealing with time-lapse atomic force microscopy, we observe dominant mechanisms of disclination annihilation involving tripoles and quadrupoles (three and four disclinations, respectively). We describe how annihilation events involving multiple disclinations result in similarly reduced kinetic exponents as observed here. These results map onto a wide variety of physical systems that exhibit similarly striped patterns.
引用
收藏
页码:1 / 011706
页数:27
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