Forced motion of a probe particle near the colloidal glass transition

被引：161

作者：

Habdas, P ^{[1
]}

Schaar, D ^{[1
]}

Levitt, AC ^{[1
]}

Weeks, ER ^{[1
]}

机构：

[1] Emory Univ, Dept Phys, Atlanta, GA 30322 USA

来源：

EUROPHYSICS LETTERS | 2004年 / 67卷 / 03期

关键词：

D O I：

10.1209/epl/i2004-10075-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use confocal microscopy to study the motion of a magnetic bead in a dense colloidal suspension, near the colloidal glass transition volume fraction phi(g). For dense liquid-like samples near phi(g), below a threshold force the magnetic bead exhibits only localized caged motion. Above this force, the bead is pulled with a fluctuating velocity. The relationship between force and velocity becomes increasingly nonlinear as phi(g) is approached. The threshold force and nonlinear drag force vary strongly with the volume fraction, while the velocity fluctuations do not change near the transition.

引用

页码：477 / 483

页数：7

共 28 条

[1] Slow drag in a granular medium
Albert, R
Pfeifer, MA
Barabási, AL
Schiffer, P
[J]. PHYSICAL REVIEW LETTERS, 1999, 82 (01) : 205 - 208
[2] A magnetic manipulator for studying local rheology and micromechanical properties of biological systems
Amblard, F
Yurke, B
Pargellis, A
Leibler, S
[J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1996, 67 (03) : 818 - 827
[3] Ten questions on glassformers, and a real space 'excitations' model with some answers on fragility and phase transitions
Angell, CA
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (29) : 6463 - 6475
[4] FORMATION OF GLASSES FROM LIQUIDS AND BIOPOLYMERS
ANGELL, CA
[J]. SCIENCE, 1995, 267 (5206) : 1924 - 1935
[5] THE PREPARATION OF POLY(METHYL METHACRYLATE) LATTICES IN NONAQUEOUS MEDIA
ANTL, L
GOODWIN, JW
HILL, RD
OTTEWILL, RH
OWENS, SM
PAPWORTH, S
WATERS, JA
[J]. COLLOIDS AND SURFACES, 1986, 17 (01): : 67 - 78
[6] Shearing a glassy material: Numerical tests of nonequilibrium mode-coupling approaches and experimental proposals
Berthier, L
Barrat, JL
[J]. PHYSICAL REVIEW LETTERS, 2002, 89 (09) : 957021 - 957024
[7] Nature of the divergence in low shear viscosity of colloidal hard-sphere dispersions
Cheng, ZD
Zhu, JX
Chaikin, PM
Phan, SE
Russel, WB
[J]. PHYSICAL REVIEW E, 2002, 65 (04): : 8
[8] Direct visualization of ageing in colloidal glasses
Courtland, RE
Weeks, ER
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (01) : S359 - S365
[9] Methods of digital video microscopy for colloidal studies
Crocker, JC
Grier, DG
[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1996, 179 (01) : 298 - 310
[10] Three-dimensional confocal microscopy of colloids
Dinsmore, AD
Weeks, ER
Prasad, V
Levitt, AC
Weitz, DA
[J]. APPLIED OPTICS, 2001, 40 (24) : 4152 - 4159

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