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期刊论文

Spontaneous formation of periodic nanostructured film by electrodeposition: Experimental observations and modeling

王牧Yuan Wang Yu Cao Mu Wang* Sheng Zhong Ming-Zhe Zhang Yan Feng Ru-Wen Peng Xi-Ping Hao and Nai-Ben Ming

PHYSICAL REVIEW E 69, 021607 (2004),-0001,():

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摘要/描述

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 100nm 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.

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