Single-particle tracking of janus colloids in close proximity

被引：27

作者：

Anthony, Stephen M. ^{[1
]}

Kim, Minsu ^{[2
]}

Granick, Steve ^{[1
,2
,3
]}

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

来源：

LANGMUIR | 2008年 / 24卷 / 13期

关键词：

D O I：

10.1021/la800424t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We describe algorithms and an experimental method based on differential interference contrast microscopy to discriminate optically anisotropic colloidal spheres under situations where diffraction owing to their close proximity causes overlapping images. The data analysis is applied to modulated optical nanoprobes (MOONs) that are coated with metal on one hemisphere. These methods enable single-particle tracking of rotation in addition to translation not only in concentrated suspensions but also in dilute suspensions when particles come into transient hydrodynamic contact. An illustrative example is given.

引用

页码：6557 / 6561

页数：5

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