Effect of geometry on the time law of Liesegang patterning

被引：19

作者：

Lagzi, I

Volford, A ^{[1
]}

Büki, A

机构：

[1] Budapest Univ Technol & Econ, Dept Phys Chem, H-1521 Budapest, Hungary

[2] Eotvos Lorand Univ, Dept Phys Chem, H-1518 Budapest, Hungary

[3] In Silico Ltd, H-1034 Budapest, Hungary

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 396卷 / 1-3期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/j.cplett.2004.08.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Evolution of Liesegang patterns in 2D radially symmetric gel media was studied experimentally in the AgNO3/K2CrO7/gelatine system. Different initial conditions were applied by varying the radius of the hole from which the penetration of the invading electrolyte took place. Our results show that the characteristics of the final pattern weakly depend on this parameter. In order to see whether this dependence is in accordance with one of the most popular theories of Liesegang patterning a numerical model based on Ostwald's supersaturation model has been solved in 2D and 3D. Results of these simulations are in a good agreement with the experimental observations. The time law was reformulated in order to incorporate the above mentioned geometrical effect. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：97 / 101

页数：5

共 18 条

[1]

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[2]

BUKI A, 1995, J CHEM PHYS, V375, P357

[3] DYNAMIC INSTABILITY AND LIGHT-INDUCED SPATIAL BIFURCATION OF HGI2 AND EXTERNAL ELECTRIC-FIELD EXPERIMENTS IN 2-DIMENSIONAL GEL MEDIA [J].