Properties of Cage Rearrangements Observed near the Colloidal Glass Transition

by: Eric R Weeks, DA Weitz

Physical Review Letters, Vol. 89, No. 9. (2002), pp. 095704-095704.

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Abstract

We use confocal microscopy to study particle motion in colloidal systems. Near the glass transition; motion is inhibited; as particles spend time trapped in transient “cages” formed by neighboring particles. We measure the cage sizes and lifetimes; which; respectively; shrink and grow as the glass transition approaches. Cage rearrangements are more prevalent in regions with lower concentrations and higher disorder. Neighboring rearranging particles typically move in parallel directions; although a nontrivial fraction moves in antiparallel directions; usually from particle pairs with initial separations corresponding to local maxima and minima of the pair correlation function g ( r ); respectively.

@article{weeks02, abstract = {We use confocal microscopy to study particle motion in colloidal systems. Near the glass transition; motion is inhibited; as particles spend time trapped in transient “cages” formed by neighboring particles. We measure the cage sizes and lifetimes; which; respectively; shrink and grow as the glass transition approaches. Cage rearrangements are more prevalent in regions with lower concentrations and higher disorder. Neighboring rearranging particles typically move in parallel directions; although a nontrivial fraction moves in antiparallel directions; usually from particle pairs with initial separations corresponding to local maxima and minima of the pair correlation function g ( r ); respectively.}, author = {Weeks, Eric R. and Weitz, D. A. }, citeulike-article-id = {1203416}, doi = {10.1103/PhysRevLett.89.095704}, journal = {Physical Review Letters}, keywords = {cages, colloids, confocal, diffusion, glass, msd, pmma}, number = {9}, pages = {095704}, posted-at = {2007-09-19 14:49:14}, priority = {0}, publisher = {American Physical Society}, title = {Properties of Cage Rearrangements Observed near the Colloidal Glass Transition}, url = {http://dx.doi.org/10.1103/PhysRevLett.89.095704}, volume = {89}, year = {2002} }

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TY - JOUR ID - weeks02 L3 - citeulike-article-id:1203416 TI - Properties of Cage Rearrangements Observed near the Colloidal Glass Transition JF - Physical Review Letters VL - 89 IS - 9 SP - 095704 EP - 095704 PB - American Physical Society N2 - We use confocal microscopy to study particle motion in colloidal systems. Near the glass transition; motion is inhibited; as particles spend time trapped in transient “cages” formed by neighboring particles. We measure the cage sizes and lifetimes; which; respectively; shrink and grow as the glass transition approaches. Cage rearrangements are more prevalent in regions with lower concentrations and higher disorder. Neighboring rearranging particles typically move in parallel directions; although a nontrivial fraction moves in antiparallel directions; usually from particle pairs with initial separations corresponding to local maxima and minima of the pair correlation function g ( r ); respectively. KW - cages KW - colloids KW - confocal KW - diffusion KW - glass KW - msd KW - pmma AU - Weeks, Eric AU - Weitz, DA PY - 2002//12/ UR - http://dx.doi.org/10.1103/PhysRevLett.89.095704 ER -

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