Magnetic beads as interfacial nanoprobes

被引：9

作者：

Helseth, LE ^{[1
]}

Wen, HZ ^{[1
]}

Heinig, P ^{[1
]}

Fischer, TM ^{[1
]}

机构：

[1] Florida State Univ, Dept Biochem & Chem, Tallahassee, FL 32306 USA

来源：

LANGMUIR | 2004年 / 20卷 / 16期

关键词：

Brownian movement - Electric fields - Electromagnetic wave polarization - Faraday effect - Interfaces (materials) - Magnetic anisotropy - Magnetic field effects - Magnetic films - Magnetization - Paramagnetic materials - Water;

D O I：

10.1021/la049802o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We use paramagnetic beads to probe strongly localized magnetic fields from one-dimensional nanomagnets. Using a polarization microscope in reflection mode, we find that light reflected from beads exhibits intensity fluctuations which may help us understand Brownian motion near interfaces. We estimate the height fluctuations and femtonewton forces acting on the beads.

引用

页码：6556 / 6559

页数：4

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