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Spontaneous formation of periodic nanostructured film by electrodeposition: Experimental observations and modeling | | Yuan Wang
; Yu Cao
; Mu Wang
; Sheng Zhong
; Ming-Zhe Zhang
; Yan Feng
; Ru-Wen Peng
; Xi-Ping Hao
; Nai-Ben Ming
; | | Date: |
31 Jan 2004 | | Journal: | Phys Rev E, 69 (2 Pt 1), 021607 | | Abstract: | 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. | | Source: | PubMed, pmid14995458 | | Services: | Forum | Review | Favorites | |
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