Induced-charge electrophoresis of metallodielectric particles

被引：446

作者：

Gangwal, Sumit ^{[1
]}

Cayre, Olivier J. ^{[1
]}

Bazant, Martin Z. ^{[2
,3
]}

Velev, Orlin D. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA

[2] MIT, Inst Soldier Nantechnol, Cambridge, MA 02139 USA

[3] MIT, Dept Math, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.100.058302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The application of ac electric fields in aqueous suspensions of anisotropic particles leads to unbalanced liquid flows and nonlinear, induced-charge electrophoretic motion. We report experimental observations of the motion of Janus microparticles with one dielectric and one metal-coated hemisphere induced by uniform fields of frequency 100 Hz-10 kHz in NaCl solutions. The motion is perpendicular to the field axis and persists after particles are attracted to a glass wall. This phenomenon may find applications in microactuators, microsensors, and microfluidic devices.

引用

页数：4

共 27 条

[1] Pumping liquids using asymmetric electrode arrays [J].

Ajdari, A .

PHYSICAL REVIEW E, 2000, 61 (01) :R45-R48

[2]

BAZANT MZ, ARXIVCONDMAT0703035

[3]

BAZANT MZ, PHYS REV LETT, V92

[4] Fabrication of asymmetrically coated colloid particles by microcontact printing techniques [J].

Cayre, O ;

Paunov, VN ;

Velev, OD .

JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (10) :2445-2450

[5]

*EPAPS, EPRLTAO100007806

[6]

GAMAYUNOV NI, 1986, COLLOID J USSR+, V48, P197

[7] Anisotropy of building blocks and their assembly into complex structures [J].

Glotzer, Sharon C. ;

Solomon, Michael J. .

NATURE MATERIALS, 2007, 6 (08) :557-562

[8]

KILIC MS, ARXIV07120453

[9] Experimental observation of induced-charge electro-osmosis around a metal wire in a microchannel [J].

Levitan, JA ;

Devasenathipathy, S ;

Studer, V ;

Ben, YX ;

Thorsen, T ;

Squires, TM ;

Bazant, MZ .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 267 (1-3) :122-132

[10]

Murtsovkin VA, 1996, COLLOID J+, V58, P341

← 1 2 3 →