Pattern selection induced by electroconvection in the electrodeposition of iron
Pattern selection induced by electroconvection in the electrodeposition of iron
复制标题
铁电沉积中电对流引起的图案选择
DOI：
10.1103/physreve.61.5512
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Ming
中科院分区：
文献类型：
--
作者：
Zhang;Wang;Zhong;Chen;Ming
铁电沉积的形貌与电解液的pH值密切相关。宏观上，取决于分支间对流的强度，这是与电解质中的H3 O+的浓度，存款形态变化从树状图案到网状图案和密集的分支形态。微观上，低浓度H_3O ~+时，存款呈分枝状、密集分枝状，高浓度H_3O ~+时，存款变得相对光滑、呈线状。观察到生长尖端两侧对流涡的对称性决定了尖端的生长行为。我们认为H3 O+通过引发枝间对流或改变存款与电解液的有效界面能来影响FeSO 4溶液电沉积铁的图形形成和图形选择。
The morphology of iron electrodeposit is shown to relate closely to the pH of the electrolyte solution. Macroscopically, depending on the strength of the interbranch convection, which is associated with the concentration of H3O+ in the electrolyte, the deposit morphology varies from treelike pattern to meshlike pattern and dense-branching morphology. Microscopically the deposit is ramified and dense-branching at lower concentration of H3O+, while it becomes relatively smooth and stringy at higher H3O+ concentration. The symmetry of the convective vortices on the two sides of the growing tip is observed to decide the growth behavior of the tip. We suggest that H3O+ influences the pattern formation and pattern selection in the electrodeposition of iron from FeSO4 solution by either initiating interbranch convection or changing the effective interfacial energy of the deposit and the electrolyte.