Forced motion of a probe particle near the colloidal glass transition

By P. Habdas, D. Schaar, A. C. Levitt, E. Weeks. 2003

146 citations recorded by the source corpus.

We use confocal microscopy to study the motion of a magnetic bead in a dense colloidal suspension, near the colloidal glass transition volume fraction g. For dense liquid-like samples near 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 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.

Subfields: Biomedical Engineering, Condensed Matter Physics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/1576ebe6d03a9ba258febfc712019c2d2906d7ee

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In Biomedical Engineering

1. L. Ramos
2. T. Squires
3. L. Cipelletti
4. Martin Z. Bazant
5. George M. Whitesides
6. A. Ajdari

In Condensed Matter Physics

1. L. Ramos
2. T. Squires
3. L. Cipelletti

In Materials Chemistry

1. Thomas G. Mason
2. L. Ramos
3. T. Squires
4. L. Cipelletti
5. Thomas Andrew Waigh

Citations in the corpus

• Fluid Mechanics of Microrheology (2010, background): “F or p er so na l u se o nl y. glass transition (Habdas et al. 2004) and nanowires through wormlike micellar solutions (Cappallo et al. 2007).”
• Slow dynamics in glassy soft matter (2005, background): “Habdas et al have performed original experiments [100] where they measure the average velocity and the velocity fluctuations of a magnetic bead subjected to a force, f , and immersed in a dense colloidal suspension (in the supercooled fluid state).”