Mutual Diffusion of Inclusions in Freely Suspended Smectic Liquid Crystal Films

被引：22

作者：

Qi, Zhiyuan ^{[1
,2
]}

Zoom Hoang Nguyen ^{[1
,2
]}

Park, Cheol Soo ^{[1
,2
]}

Glaser, Matthew A. ^{[1
,2
]}

Maclennan, Joseph E. ^{[1
,2
]}

Clark, Noel A. ^{[1
,2
]}

Kuriabova, Tatiana ^{[3
]}

Powers, Thomas R. ^{[3
,4
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Colorado, Liquid Crystal Mat Res Ctr, Boulder, CO 80309 USA

[3] Brown Univ, Sch Engn, Providence, RI 02912 USA

[4] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 12期

关键词：

LIGHT-SCATTERING; BROWNIAN-MOTION; LIPID-BILAYER; FLUID; EDGE;

D O I：

10.1103/PhysRevLett.113.128304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study experimentally and theoretically the hydrodynamic interaction of pairs of circular inclusions in two-dimensional, fluid smectic membranes suspended in air. By analyzing their Brownian motion, we find that the radial mutual mobilities of identical inclusions are independent of their size but that the angular coupling becomes strongly size dependent when their radius exceeds a characteristic hydrodynamic length. These observations are described well for arbitrary inclusion separations by a model that generalizes the Levine-MacKintosh theory of point-force response functions and uses a boundary-element approach to calculate the mobility matrix for inclusions of finite extent.

引用

页数：5

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