Concentration gradients in mixed magnetic and nonmagnetic colloidal suspensions

被引：12

作者：

Erb, Randall M. ^{[1
]}

Yellen, Benjamin B. ^{[1
]}

机构：

[1] Duke Univ, Ctr Biologically Inspired Mat & Mat Syst, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2831789

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An approximate analytic model is derived to describe the equilibrium concentration profile within mixed suspensions of magnetic and nonmagnetic colloidal particles, and a strong qualitative agreement is shown between theory and experiment. This work extends previous theoretical and experimental investigations of density profiles within magnetic nanoparticle fluids, known as ferrofluid. (c) 2008 American Institute of Physics.

引用

收藏

页数：3

相关论文

共 15 条

[1] CHARGE RENORMALIZATION, OSMOTIC-PRESSURE, AND BULK MODULUS OF COLLOIDAL CRYSTALS - THEORY [J].

ALEXANDER, S ;

CHAIKIN, PM ;

GRANT, P ;

MORALES, GJ ;

PINCUS, P ;

HONE, D .

JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (11) :5776-5781

[2] BROWNIAN DIFFUSION OF PARTICLES WITH HYDRODYNAMIC INTERACTION [J].

BATCHELOR, GK .

JOURNAL OF FLUID MECHANICS, 1976, 74 (MAR9) :1-29

[3] THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE [J].

BROWN, WF .

PHYSICAL REVIEW, 1963, 130 (05) :1677-+

[4] Model of detecting nonmagnetic cavities in ferrofluid for biological sensing applications [J].

Erb, Randall M. ;

Yellen, Benjamin B. .

IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) :3554-3556

[5]

ERB RM, IN PRESS J APPL PHYS

[6] Development of bearings and a damper based on magnetically controllable fluids [J].

Guldbakke, J. M. ;

Hesselbach, J. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (38) :S2959-S2972

[7] DYNAMIC BEHAVIOR OF SIMPLE MAGNETIC HOLE SYSTEMS [J].

HELGESEN, G ;

PIERANSKI, P ;

SKJELTORP, AT .

PHYSICAL REVIEW A, 1990, 42 (12) :7271-7280

[8] Frequency characteristics of stiffness and damping effect of a ferrofluid bearing [J].

Miwa, M ;

Harita, H ;

Nishigami, T ;

Kaneko, R ;

Unozawa, H .

TRIBOLOGY LETTERS, 2003, 15 (02) :97-105

[9] Electric moments of molecules in liquids [J].

Onsager, L .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1936, 58 :1486-1493

[10]

Panofsky W. K. H., 1955, Classical Electricity and Magnetism