Flexible magnetic filaments as micromechanical sensors

被引：172

作者：

Goubault, C

Jop, P

Fermigier, M

Baudry, J

Bertrand, E

Bibette, J

机构：

[1] Ecole Super Phys & Chim Ind Ville Paris, Lab Colloides & Mat Divises, UMR 7612, F-75005 Paris, France

[2] Inst Curie, Lab Physicochim Curie, UMR 168, F-75005 Paris, France

[3] Ecole Super Phys & Chim Ind Ville Paris, Lab Phys & Mecan Milieux Heterogenes, UMR 7636, F-75005 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.91.260802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new micromechanical approach to probe bending rigidity at molecular scale. Long flexible filaments made of magnetic colloids and linkers are shown to adopt under magnetic field a hairpin configuration. Measuring the hairpin curvature as a function of the field intensity and the linker length from diffracted light allows us to deduce the linker bending rigidity kappa. The technique is presented for two types of linkers: a spontaneously adsorbing polymer and a grafted biomolecular.

引用

页数：4

共 15 条

[1] DIRECT MEASUREMENT OF COLLOIDAL FORCES [J].