Regulating Brownian Fluctuations with Tunable Microscopic Magnetic Traps

被引：16

作者：

Chen, A. ^{[1
]}

Vieira, G. ^{[1
]}

Henighan, T. ^{[1
]}

Howdyshell, M. ^{[1
]}

North, J. A. ^{[1
]}

Hauser, A. J. ^{[1
]}

Yang, F. Y. ^{[1
]}

Poirier, M. G. ^{[1
]}

Jayaprakash, C. ^{[1
]}

Sooryakumar, R. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 08期

关键词：

OPTICAL TRAP; PARTICLES; TRANSPORT; MOVEMENT; SYSTEMS; MOTION; MOTORS;

D O I：

10.1103/PhysRevLett.107.087206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A major challenge to achieving positional control of fluid borne submicron sized objects is regulating their Brownian fluctuations. We present a magnetic-field-based trap that regulates the thermal fluctuations of superparamagnetic beads in suspension. Local domain-wall fields originating from patterned magnetic wires, whose strength and profile are tuned by weak external fields, enable the bead trajectories within the trap to be managed and easily varied between strong confinements and delocalized spatial excursions that are described remarkably well by simulations.

引用

页数：4

共 25 条

[1] OBSERVATION OF A SINGLE-BEAM GRADIENT FORCE OPTICAL TRAP FOR DIELECTRIC PARTICLES [J].