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The Electrochemical Response of Single Crystalline Copper Nanowires to Atmospheric Air and Aqueous Solution

Zhang, Bowei ; Chen, Bensong ; Wu, Junsheng ; Hao, Shiji ; Yang, Guang ; Cao, Xun ; Jing, Lin ; Zhu, Minmin ; Tsang, Siu Hon ; Teo, Edwin Hang Tong ; Huang, Yizhong

Small (Weinheim an der Bergstrasse, Germany), 2017-03, Vol.13 (10), p.np-n/a [Periódico revisado por pares]

Germany: Wiley Subscription Services, Inc

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  • Título:
    The Electrochemical Response of Single Crystalline Copper Nanowires to Atmospheric Air and Aqueous Solution
  • Autor: Zhang, Bowei ; Chen, Bensong ; Wu, Junsheng ; Hao, Shiji ; Yang, Guang ; Cao, Xun ; Jing, Lin ; Zhu, Minmin ; Tsang, Siu Hon ; Teo, Edwin Hang Tong ; Huang, Yizhong
  • Assuntos: alkaline aqueous solution ; ALUMINUM OXIDE ; Aqueous solutions ; ATMOSPHERES ; atmospheric air ; Copper ; copper nanowires ; Copper oxides ; CRYSTAL STRUCTURE ; Crystallinity ; Direct reduction ; electrochemical response ; Epitaxy ; HUMIDITY ; MICA ; MICROWIRE ; Nanotechnology ; Nanowires ; Oxidation ; OXIDES ; Relative humidity ; Sodium hydroxide ; SOLUTIONS ; Substrates
  • É parte de: Small (Weinheim an der Bergstrasse, Germany), 2017-03, Vol.13 (10), p.np-n/a
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: In this paper, single crystalline copper nanowires (CuNWs) have been electrochemically grown through anodic aluminum oxide template. The environmental stability of the as‐obtained CuNWs in both 40% relative humidity (RH) atmosphere and 0.1 m NaOH aqueous solution has been subsequently studied. In 40% RH atmosphere, a uniform compact Cu2O layer is formed as a function of exposure time following the logarithmic law and epitaxially covers the CuNW surfaces. It is also found that the oxide layers on CuNWs are sequentially grown when subjected to the cyclic voltammetry measurement in 0.1 m NaOH solution. An epitaxially homogeneous Cu2O layer is initially formed over the surface of the CuNW substrates by solid‐state reaction (SSR). Subsequently, the conversion of Cu2O into epitaxial CuO based on the SSR takes place with the increase of applied potential. This CuO layer is partially dissolved in the solution forming Cu(OH)2, which then redeposited on the CuNW surfaces (i.e., dissolution‐redeposition (DR) process) giving rise to a mixed polycrystalline CuO/Cu(OH)2 layer. The further increase of applied potential allows the complete oxidation of Cu2O into CuO to form a dual‐layer structure (i.e., CuO inner layer and Cu(OH)2 outer layer) with random orientations through an enhanced DR process. Electrochemical response of uniform single crystalline copper nanowires (CuNWs) is revealed by transmission electron microscope observation of oxide films formed in both 40% relative humidity atmosphere and 0.1 m NaOH solution. The results of this study may be used for references in the protection and degradation control for the practical CuNW‐based nanodevices and nanosystems.
  • Editor: Germany: Wiley Subscription Services, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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