Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres.
Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres.
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多分散带电球体 bcc 结晶水悬浮液的平衡流体晶体界面自由能
DOI:
10.1103/physreve.93.022601
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
D. M. Herlach
中科院分区:
文献类型:
--
作者:
T. Palberg;P. Wette;D. M. Herlach
The interfacial free energy is a central quantity in crystallization from the metastable melt. In suspensions of charged colloidal spheres, nucleation and growth kinetics can be accurately measured from optical experiments. In previous work, from these data effective nonequilibrium values for the interfacial free energy between the emerging bcc nuclei and the adjacent melt in dependence on the chemical potential difference between melt phase and crystal phase were derived using classical nucleation theory (CNT). A strictly linear increase of the interfacial free energy was observed as a function of increased metastability. Here, we further analyze these data for five aqueous suspensions of charged spheres and one binary mixture. We utilize a simple extrapolation scheme and interpret our findings in view of Turnbull's empirical rule. This enables us to present the first systematic experimental estimates for a reduced interfacial free energy,, between the bcc-crystal phase and the coexisting equilibrium fluid. Values obtained forare on the order of a few. Their values are not correlated to any of the electrostatic interaction parameters but rather show a systematic decrease with increasing size polydispersity and a lower value for the mixture as compared to the pure components. At the same time,also shows an approximately linear correlation to the entropy of freezing. The equilibrium interfacial free energy of strictly monodisperse charged spheres may therefore be still greater.
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DOI:
10.1063/1.2186327
发表时间:
2006-04
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Alexander Fladerer;R. Strey
通讯作者:
Alexander Fladerer;R. Strey
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
P. Wette;H. Schöpe;R. Biehl;T. Palberg
通讯作者:
T. Palberg
影响因子:
4.4
作者:
Marjolein N. van der Linden;A. van Blaaderen;M. Dijkstra
通讯作者:
M. Dijkstra
影响因子:
4.4
作者:
Nina Lorenz;T. Palberg
通讯作者:
T. Palberg
影响因子:
3.4
作者:
M. Franke;Sebastian Golde;H. Schöpe
通讯作者:
H. Schöpe