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Superhydrophobic surfaces via electroless displacement of nanometric Cu layers by Ag~+

机译：通过Ag〜+化学置换纳米Cu层的超疏水表面

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摘要

This paper explores the possibility of making hydrophobic and superhydrophobic surfaces from electroless displacement of Cu by Ag~+, in the case where Cu oxidation is limited owing to Cu layers of nanometric thicknesses. The morphology of the Ag layers is studied by scanning electron microscopy for Cu thicknesses between 10 and 80 nm. The mapping of the elemental content of the layers by electron dispersive X-ray analysis also has been used to clarify the particle growing by diffusion limited aggregation, it is shown that the average size and the shape complexity of the Ag particles increase with the Cu thickness. The addition of dimethyl sulfoxide in the Ag~+ aqueous solution improves the surface homogeneity, increases the particle density and decreases their sizes. The wetting behaviour of the surfaces, after grafting with octadecanethiol, has been studied from measurements of the contact angles of a drop of water. According to the thickness of the initial Cu layer and the morphology of the Ag layer, contact angles range between 110° and 154°. Superhydrophobic surfaces are obtained from 80 nm thick Cu layers.
机译：本文探讨了在由于纳米厚度的Cu层而限制Cu氧化的情况下，通过Ag〜+对Cu的化学置换产生疏水和超疏水表面的可能性。通过扫描电子显微镜研究10至80 nm之间的Cu厚度，研究了Ag层的形貌。通过电子色散X射线分析对层中元素含量的映射还用于阐明通过扩散受限聚集而生长的颗粒，结果表明，Ag颗粒的平均尺寸和形状复杂度随Cu厚度的增加而增加。在Ag +水溶液中添加二甲亚砜可改善表面均匀性，增加颗粒密度并减小其尺寸。从十八烷硫醇接枝后，已经通过测量水滴的接触角研究了表面的润湿行为。根据初始Cu层的厚度和Ag层的形态，接触角在110°至154°之间。超疏水表面是从80 nm厚的Cu层获得的。

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  • 来源
    《Applied Surface Science》 |2009年第16期|7439-7445|共7页
  • 作者

    R. Brenier; S.M.M. Ramos; M. Montchanin;

  • 作者单位

    Universite de Lyon, Universite Lyon1, Laboratoire PMCN, CNRS, UMR 5586, F69622 Villeurbanne Cedex, France;

    Universite de Lyon, Universite Lyon1, Laboratoire PMCN, CNRS, UMR 5586, F69622 Villeurbanne Cedex, France;

    Universite de Lyon, Universite Lyon1, Laboratoire PMCN, CNRS, UMR 5586, F69622 Villeurbanne Cedex, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    wetting; superhydrophobic; silver; diffusion; galvanic; roughness;

    机译：润湿超疏水银;扩散;电流粗糙度;

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