Insights into the wettability transition of nanosecond laser ablated surface under ambient air exposure

Journal of Colloid and Interface Science
Zhen YangYanling Tian

Abstract

Super-hydrophobic surfaces are attractive due to self-cleaning and anti-corrosive behaviors in harsh environments. Laser texturing offers a facile method to produce super-hydrophobic surfaces. However, the results indicated that the fresh laser ablated surface was generally super-hydrophilic and then gradually reached super-hydrophobic state when exposed to ambient air for certain time. Investigating wettability changing mechanism could contribute to reducing wettability transition period and improving industrial productivity. To solve this problem, we have studied the bare aluminum surface, fresh laser ablated super-hydrophilic surface, 15-day air exposed surface, and the aged super-hydrophobic surface by time-dependent water contact angle (WCA) and rolling angle (RA), scanning electron microscopy (SEM), 3D profile and X-ray photoelectron spectroscopy (XPS). The origins of super-hydrophilicity of the fresh laser ablated surface are identified as (1) the formation of hierarchical rough structures and (2) the surface chemical modifications (the decrease of nonpolar carbon, the formation of hydrophilic alumina and residual unsaturated atoms). The chemisorbed nonpolar airborne hydrocarbons from air moisture contributed to the grad...Continue Reading

References

Mar 10, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Anne-Marie KietzigPeter Englezos
Sep 2, 2009·Journal of Colloid and Interface Science·R V Lakshmi, Bharathibai J Basu
Dec 26, 2012·Journal of Colloid and Interface Science·Gregory D Bixler, Bharat Bhushan
Dec 8, 2014·Journal of Colloid and Interface Science·Jiangyou LongPeixun Fan
Feb 23, 2018·Journal of Colloid and Interface Science·Joseph Cremaldi, Bharat Bhushan
Apr 15, 2018·Journal of Colloid and Interface Science·Joshua A MaurerStephen F Bartolucci

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Citations

Feb 8, 2020·Bioinspiration & Biomimetics·Ryota YamagishiToshihiro Kasuga
Apr 7, 2019·Scientific Reports·Ghassan HassanHussain Al-Qahtani
May 27, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Zhen ShiXuefeng Zhang
Jun 3, 2021·Materials·Gennaro Salvatore PonticelliStefano Guarino
Apr 20, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Víctor J RicoAgustín R González-Elipe
Dec 10, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Chengjuan YangXianping Liu
Dec 7, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Chenbin MaXingsheng Wang
Apr 21, 2020·Ultrasonics Sonochemistry·Martin PetkovšekPeter Gregorčič

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