GROWTH VELOCITY, THE LIMITING CURRENT, AND MORPHOLOGY SELECTION IN ELECTRODEPOSITION OF BRANCHED AGGREGATES

被引:43
作者
BARKEY, D
GARIK, P
BENJACOB, E
MILLER, B
ORR, B
机构
[1] BOSTON UNIV,CTR POLYMER STUDIES,DEPT PHYS,BOSTON,MA 02215
[2] TEL AVIV UNIV,SCH PHYS & ASTRON,DEPT CONDENSED MATTER PHYS,IL-69978 TEL AVIV,ISRAEL
[3] UNIV MICHIGAN,DEPT PHYS,RANDALL LAB,ANN ARBOR,MI 48109
关键词
D O I
10.1149/1.2069337
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrochemical deposition (ECD) from unsupported electrolyte in two-dimensional radial cells provides a model system for the study of branched aggregates which also arise in other depositional growth systems. It is shown that ECD aggregates grow within a concentration boundary layer that forms a smooth envelope around the branch tips. A material balance around this front allows calculation of the local driving force for growth and reveals that a limiting current can be attained in stationary solution for sufficiently high rates of growth at a well-defined limiting velocity. This model of the concentration boundary layer is applied to the problems of velocity and morphology selection.
引用
收藏
页码:1044 / 1050
页数:7
相关论文
共 44 条