Forced motion of a probe particle near the colloidal glass transition

@article{HabdasWeeksEurophysLett2004, abstract = {We use confocal microscopy to study the motion of a magnetic bead in a dense colloidal suspension, near the colloidal glass transition volume fraction phg. For dense liquid-like samples near phg, 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 phg 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.}, author = {Habdas, P. and Schaar, D. and Levitt, A. C. and Weeks, E. R. }, citeulike-article-id = {1678162}, journal = {Europhys. Lett.}, number = {3}, pages = {477--483}, posted-at = {2008-02-20 21:34:27}, priority = {2}, title = {Forced motion of a probe particle near the colloidal glass transition}, url = {http://stacks.iop.org/0295-5075/67/477}, volume = {67}, year = {2004} }

TY - JOUR ID - HabdasWeeksEurophysLett2004 L3 - citeulike-article-id:1678162 TI - Forced motion of a probe particle near the colloidal glass transition JF - Europhys. Lett. VL - 67 IS - 3 SP - 477 EP - 483 N2 - We use confocal microscopy to study the motion of a magnetic bead in a dense colloidal suspension, near the colloidal glass transition volume fraction phg. For dense liquid-like samples near phg, 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 phg 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. AU - Habdas, P AU - Schaar, D AU - Levitt, AC AU - Weeks, ER PY - 2004/// UR - http://stacks.iop.org/0295-5075/67/477 ER -