Application of ferromagnetic nanowires to interfacial microrheology

被引：43

作者：

Anguelouch, A. ^{[1
]}

Leheny, R. L. ^{[1
]}

Reich, D. H. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2349841

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Experiments are reported to characterize the viscous drag on Ni wires of diameter of 350 nm and lengths of 5 mu m < L < 30 mu m confined to the air interface of glycerol/water mixtures upon which very thin (30-150 nm thick) silicone oil films are deposited. The sensitivity of the observed drag to the film viscosity demonstrates the utility of the wires as highly sensitive probes of interfacial shear rheology. The dependence of the drag on wire length is analyzed in terms of recent theoretical predictions for the hydrodynamic drag on an anisotropic particle confined to an interfacial film. (c) 2006 American Institute of Physics.

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