期刊
APPLIED SURFACE SCIENCE
卷 313, 期 -, 页码 411-417出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.05.224
关键词
Femtosecond laser ablation; Hydrophobic surface; Hierarchical structure
类别
资金
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Korea Institute of Machinery and Materials (KIMM)
Hydrophobic surface properties are sought after in many areas of research, engineering, and consumer product development. Traditionally, hydrophobic surfaces are produced by using various types of coatings. However, introduction of foreign material onto the surface is often undesirable as it changes surface chemistry and cannot provide a long lasting solution (i.e. reapplication is needed). Therefore, surface modification by transforming the base material itself can be preferable in many applications. Femtosecond laser ablation is one of the methods that can be used to create structures on the surface that will exhibit hydrophobic behavior. The goal of the presented research was to create micro and nano-scale patterns that will exhibit hydrophobic properties with no additional post treatment. As a result, dual scale patterned structures were created on the surface of steel aluminum and tungsten carbide samples. Ablation was performed in the open air with no subsequent treatment. Resultant surfaces appeared to be strongly hydrophobic or even superhydrophobic with contact angle values of 140 degrees and higher. In conclusion, the nature of surface hydrophobicity proved to be highly dependent on surface morphology as the base materials used are intrinsically hydrophilic. It was also proven that the hydrophobicity inducing structures could be manufactured using femtosecond laser machining in a single step with no subsequent post treatment. (C) 2014 Elsevier B.V. All rights reserved.
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