Short-~and long-range correlated motion observed in colloidal glasses and liquids

by: John, DA Weitz

Journal of Physics: Condensed Matter, Vol. 19, No. 20. (2007)

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Abstract

We use a confocal microscope to examine the motion of individual particles in a dense colloidal suspension. Close to the glass transition, particle motion is strongly spatially correlated. The correlations decay exponentially with particle separation, yielding a dynamic length scale of O(2-3s) (in terms of particle diameter s). This length scale grows modestly as the glass transition is approached. Further, the correlated motion exhibits a strong spatial dependence on the pair correlation function g(r). Motion within glassy samples is weakly correlated, but with a larger spatial scale for this correlation.

@article{citeulike:1605887, abstract = {We use a confocal microscope to examine the motion of individual particles in a dense colloidal suspension. Close to the glass transition, particle motion is strongly spatially correlated. The correlations decay exponentially with particle separation, yielding a dynamic length scale of O(2-3s) (in terms of particle diameter s). This length scale grows modestly as the glass transition is approached. Further, the correlated motion exhibits a strong spatial dependence on the pair correlation function g(r). Motion within glassy samples is weakly correlated, but with a larger spatial scale for this correlation.}, author = {John and Weitz, D. A. }, citeulike-article-id = {1605887}, doi = {http://dx.doi.org/10.1088/0953-8984/19/20/205131}, journal = {Journal of Physics: Condensed Matter}, keywords = {2007, weeks, weitz}, number = {20}, posted-at = {2008-04-23 01:02:10}, priority = {2}, title = {Short-\~{}and long-range correlated motion observed in colloidal glasses and liquids}, url = {http://dx.doi.org/10.1088/0953-8984/19/20/205131}, volume = {19}, year = {2007} }

RIS record

TY - JOUR ID - citeulike:1605887 L3 - citeulike-article-id:1605887 N2 - We use a confocal microscope to examine the motion of individual particles in a dense colloidal suspension. Close to the glass transition, particle motion is strongly spatially correlated. The correlations decay exponentially with particle separation, yielding a dynamic length scale of O(2-3s) (in terms of particle diameter s). This length scale grows modestly as the glass transition is approached. Further, the correlated motion exhibits a strong spatial dependence on the pair correlation function g(r). Motion within glassy samples is weakly correlated, but with a larger spatial scale for this correlation. IS - 20 JF - Journal of Physics: Condensed Matter TI - Short-~and long-range correlated motion observed in colloidal glasses and liquids VL - 19 KW - 2007 KW - weeks KW - weitz AU - John AU - Weitz, DA PY - 2007/// UR - http://dx.doi.org/10.1088/0953-8984/19/20/205131 ER -

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