Wang Yuan, Cao Yu, Wang Mu, Zhong Sheng, Zhang Ming-Zhe, Feng Yan, Peng Ru-Wen, Hao Xi-Ping, Ming Nai-Ben
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Feb;69(2 Pt 1):021607. doi: 10.1103/PhysRevE.69.021607. Epub 2004 Feb 27.
In this paper we report the spontaneous formation of a nanostructured film by electrodeposition from an ultrathin electrolyte layer of CuSO4. The film consists of straight periodic ditches and ridges, which corresponds to the alternating deposition of nanocrystallites of copper and copper plus cuprous oxide, respectively. The periodicity on the film may vary from 100 nm to a few hundred nanometers depending on the experimental conditions. In the formation of the periodically nanostructured film, oscillating voltage/current has been observed across the electrodes, and the frequency depends on the pH of the electrolyte and the applied current/voltage. A model based on the coupling of [Cu2+] and [H+] in the electrodeposition is proposed to describe the oscillatory phenomena in our system. The calculated results are in agreement with the experimental observations.
在本文中，我们报道了通过从超薄硫酸铜电解质层进行电沉积自发形成纳米结构薄膜的过程。该薄膜由笔直的周期性沟槽和脊组成，分别对应于铜纳米微晶以及铜与氧化亚铜的交替沉积。薄膜上的周期性可根据实验条件在100纳米至几百纳米之间变化。在周期性纳米结构薄膜的形成过程中，观察到电极两端存在振荡电压/电流，其频率取决于电解质的pH值和施加的电流/电压。提出了一个基于电沉积过程中[Cu2+]和[H+]耦合的模型来描述我们系统中的振荡现象。计算结果与实验观察结果一致。
