TY - JOUR
T1 - Correlations of structure and dynamics in an aging colloidal glass
AU - Cianci, Gianguido C.
AU - Courtland, Rachel E.
AU - Weeks, Eric R.
N1 - Funding Information:
We thank T. Brzinski, P. Harrowell, and C. Nugent for useful discussions. This work was supported by NASA microgravity fluid physics grant NAG3-2728.
PY - 2006/9
Y1 - 2006/9
N2 - We study concentrated colloidal suspensions, a model system which has a glass transition. Samples in the glassy state show aging, in that the motion of the colloidal particles slows as the sample ages from an initial state. We study the relationship between the static structure and the slowing dynamics, using confocal microscopy to follow the three-dimensional motion of the particles. The structure is quantified by considering tetrahedra formed by quadruplets of neighboring particles. We find that while the sample clearly slows down during aging, the static properties as measured by tetrahedral quantities do not vary. However, a weak correlation between tetrahedron shape and mobility is observed, suggesting that the structure facilitates the motion responsible for the sample aging.
AB - We study concentrated colloidal suspensions, a model system which has a glass transition. Samples in the glassy state show aging, in that the motion of the colloidal particles slows as the sample ages from an initial state. We study the relationship between the static structure and the slowing dynamics, using confocal microscopy to follow the three-dimensional motion of the particles. The structure is quantified by considering tetrahedra formed by quadruplets of neighboring particles. We find that while the sample clearly slows down during aging, the static properties as measured by tetrahedral quantities do not vary. However, a weak correlation between tetrahedron shape and mobility is observed, suggesting that the structure facilitates the motion responsible for the sample aging.
KW - A. Disordered systems
KW - D. Order-disorder effects
KW - D. Phase transitions
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U2 - 10.1016/j.ssc.2006.04.039
DO - 10.1016/j.ssc.2006.04.039
M3 - Article
AN - SCOPUS:33747752804
SN - 0038-1098
VL - 139
SP - 599
EP - 604
JO - Solid State Communications
JF - Solid State Communications
IS - 11-12
ER -