DYNAMIC SCALING IN AN AGGREGATING 2D LENNARD-JONES SYSTEM

被引:24
作者
BUTLER, BD [1 ]
HANLEY, HJM [1 ]
HANSEN, D [1 ]
EVANS, DJ [1 ]
机构
[1] AUSTRALIAN NATL UNIV,RES SCH CHEM,CANBERRA,ACT 0200,AUSTRALIA
关键词
D O I
10.1103/PhysRevLett.74.4468
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The evolution of a 2D Lennard-Jones system, quenched from the fluid to below the triple point, is simulated by molecular dynamics. We show that the structure factor obeys the scaling relation S(q/qm(t))∼qm(t)-dfS(q/qm). Here qm is the location of the low angle peak in S(q), df=1.85±0.05 is a fractal dimension, and S(q/qm) is a time-independent characteristic function which peaks at qm. The quenching process is thermodynamically similar to the formation of a gel from a sol. Hence the relation suggests that a characteristic fractal dimension of even a dense gel can be derived from measurements of the time evolution of S(q). © 1995 The American Physical Society.
引用
收藏
页码:4468 / 4471
页数:4
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