Nanosecond laser textured superhydrophobic metallic surfaces and their chemical sensing applications
By D. Ta, A. Dunn, T. Wasley, R. Kay, Jonathan Stringer, Patrick J. Smith, C. Connaughton, J. Shephard. 2015
349 citations recorded by the source corpus.
This work demonstrates superhydrophobic behavior on nanosecond laser patterned copper and brass surfaces. Compared with ultrafast laser systems previously used for such texturing, infrared nanosecond fiber lasers offer a lower cost and more robust system combined with potentially much higher processing rates. The wettability of the textured surfaces develops from hydrophilicity to superhydrophobicity over time when exposed to ambient conditions. The change in the wetting property is attributed to the partial deoxidation of oxides on the surface induced during laser texturing. Textures exhibiting steady state contact angles of up to ∼152° with contact angle hysteresis of around 3–4° have been achieved. Interestingly, the superhydrobobic surfaces have the self-cleaning ability and have potential for chemical sensing applications. The principle of these novel chemical sensors is based on the change in contact angle with the concentration of methanol in a solution. To demonstrate the principle of operation of such a sensor, it is found that the contact angle of methanol solution on the superhydrophobic surfaces exponentially decays with increasing concentration. A significant reduction, of 128°, in contact angle on superhydrophobic brass is observed, which is one order of magnitude greater than that for the untreated surface (12°), when percent composition of methanol reaches to 28%.
Subfields: Computational Mechanics, Mechanics of Materials, Surfaces, Coatings and Films
View Paper: https://www.semanticscholar.org/paper/01c4dba09848b690060f17e4677c9b0affbe8c80
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In Computational Mechanics
In Mechanics of Materials
In Surfaces, Coatings and Films
Citations in the corpus
- Fabrication of super-hydrophobic nickel film on copper substrate with improved corrosion inhibition by electrodeposition process (2019, background): “It will take a relatively long time from serval days to several months under ambient air exposure to reach the super-hydrophobic state [21-23], which will limit the economic efficiency for any practical applications due to very long processing time.”
- Transition from superhydrophilic to superhydrophobic state of laser textured stainless steel surface and its effect on corrosion resistance (2017, result): “, the achieved contact angles of superhydrophobic surface and the time period needed for development of stable superhydrophobicity, are very similar to the results obtained by other authors, who used nanosecond lasers without any additional surface treatment [31,32].”