Tracking rotational diffusion of colloidal clusters

被引：53
|
作者：
Hunter, Gary L. [1 ]
Edmond, Kazem V. [1 ]
Elsesser, Mark T. [2 ]
Weeks, Eric R. [1 ]
机构：
[1] Emory Univ, Dept Phys, Atlanta, GA 30322 USA
[2] NYU, Ctr Soft Matter Res, Dept Phys, New York, NY 10003 USA
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 18期
基金：
美国国家科学基金会;
关键词：
CONFOCAL MICROSCOPY; GLASS-TRANSITION; PHASE-BEHAVIOR; DYNAMICS; SUSPENSIONS; SPHERES; NUCLEATION; DIMENSIONS; MOLECULES; CRYSTALS;
D O I：
10.1364/OE.19.017189
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We describe a novel method of tracking the rotational motion of clusters of colloidal particles. Our method utilizes rigid body transformations to determine the rotations of a cluster and extends conventional proven particle tracking techniques in a simple way, thus facilitating the study of rotational dynamics in systems containing or composed of colloidal clusters. We test our method by measuring dynamical properties of simulated Brownian clusters under conditions relevant to microscopy experiments. We then use the technique to track and describe the motions of a real colloidal cluster imaged with confocal microscopy. (C) 2011 Optical Society of America
引用
收藏
页码：17189 / 17202
页数：14
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