Insights into the superhydrophobicity of metallic surfaces prepared by electrodeposition involving spontaneous adsorption of airborne hydrocarbons
Insights into the superhydrophobicity of metallic surfaces prepared by electrodeposition involving spontaneous adsorption of airborne hydrocarbons
复制标题
深入了解通过电沉积制备的金属表面的超疏水性，涉及空气中碳氢化合物的自发吸附
DOI：
10.1016/j.apsusc.2014.10.170
复制
发表时间：
2015-01-01
影响因子：
6.7
通讯作者：
Li, Zelin
中科院分区：
文献类型：
--
作者：
Liu, Peng;Cao, Ling;Li, Zelin
具有超疏水性的微/纳米结构金属表面的电化学制备近年来引起了人们的极大关注。然而，起源仍然不清楚为什么光滑的亲水性金属表面通过制造微/纳米结构而不进行额外的表面改性而变得超疏水。在这项工作中，几个超疏水微/纳米结构的金属表面，包括非贵金属和贵金属，如铜，镍，镉，锌，金和钯（如Cu）或没有（例如Au）的表面氧化物膜，制备了一个简单的一步电沉积过程。通过SEM和XPS分析表明，这些表面具有良好的超疏水性，其微观/纳米结构层次和对空气中碳氢化合物的自发吸附作用均使这些表面具有良好的超疏水性。我们揭示了XPS的空气中的碳氢化合物的吸附在Ar+-蚀刻清洁Au表面是相当快的，这样的有机污染很难防止在实际操作中的表面润湿调查。我们还证实了XPS的紫外-O-3处理的超疏水金属表面并没有完全去除吸附的碳氢化合物，但主要是氧化成亲水性含氧有机物。我们希望我们的研究结果能为更深入地理解具有和不具有表面氧化膜的微/纳米结构金属表面的超疏水性提供新的思路。(C)© 2014 Elsevier B. V.保留所有权利。
Electrochemical fabrication of micro/nanostructured metallic surfaces with superhydrophobicity has recently aroused great attention. However, the origin still remains unclear why smooth hydrophilic metal surfaces become superhydrophobic by making micro/nanostructures without additional surface modifications. In this work, several superhydrophobic micro/nanostructured metal surfaces were prepared by a facile one-step electrodeposition process, including non-noble and noble metals such as copper, nickel, cadmium, zinc, gold, and palladium with (e.g. Cu) or without (e.g. Au) surface oxide films. We demonstrated by SEM and XPS that both hierarchical micro/nanostructures and spontaneous adsorption of airborne hydrocarbons endowed these surfaces with excellent superhydrophobicity. We revealed by XPS that the adsorption of airborne hydrocarbons at the Ar+-etched clean Au surface was rather quick, such that organic contamination can hardly be prevented in practical operation of surface wetting investigation. We also confirmed by XPS that ultraviolet-O-3 treatment of the superhydrophobic metal surfaces did not remove the adsorbed hydrocarbons completely, but mainly oxidized them into hydrophilic oxygen-containing organic substances. We hope our findings here shed new light on deeper understanding of superhydrophobicity for micro/nanostructured metal surfaces with and without surface oxide films. (C) 2014 Elsevier B.V. All rights reserved.