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

by: Eric R Weeks, John C Crocker, DA Weitz

Journal of Physics: Condensed Matter, Vol. 19, No. 20. (2007), pp. 205131-205131.

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摘要

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{weeks07cor, 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 = {Weeks, Eric R. and Crocker, John C. 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 = {colloids, confocal, glass, pmma, two-point}, number = {20}, pages = {205131}, posted-at = {2007-09-19 14:46:59}, priority = {0}, 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 - weeks07cor 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 EP - 205131 TI - Short- and long-range correlated motion observed in colloidal glasses and liquids VL - 19 SP - 205131 KW - colloids KW - confocal KW - glass KW - pmma KW - two-point AU - Weeks, Eric AU - Crocker, John AU - Weitz, DA PY - 2007/// UR - http://dx.doi.org/10.1088/0953-8984/19/20/205131 ER -

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