Designed patterns:: Flexible control of precipitation through electric currents

被引：35

作者：

Bena, I. ^{[1
]}

Droz, M. ^{[1
]}

Lagzi, I. ^{[2
]}

Martens, K. ^{[1
]}

Racz, Z. ^{[3
]}

Volford, A. ^{[4
]}

机构：

[1] Univ Geneva, Dept Theoret Phys, CH-1211 Geneva 4, Switzerland

[2] Eotvos Lorand Univ, Inst Chem, H-1117 Budapest, Hungary

[3] Eotvos Lorand Univ, Inst Theoret Phys HAS, H-1117 Budapest, Hungary

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期

基金：

瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.075701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Understanding and controlling precipitation patterns formed in reaction-diffusion processes is of fundamental importance with high potential for technical applications. Here we present a theory showing that precipitation resulting from reactions among charged agents can be controlled by an appropriately designed, time-dependent electric current. Examples of current dynamics yielding periodic bands of prescribed wavelength, as well as more complicated structures are given. The pattern control is demonstrated experimentally using the reaction-diffusion process 2AgNO(3)+K(2)Cr(2)O(7)-> Ag(2)Cr(2)O(7_)+2KNO(3).

引用

页数：4

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