Nanosecond laser ablated copper superhydrophobic surface with tunable ultrahigh adhesion and its renewability with low temperature annealing

He, An; Liu, Wenwen; Wang, Xue; Yang, Huan; Cao, Yu

doi:10.1016/j.apsusc.2017.10.143

Cited by 70 publications

(24 citation statements)

References 41 publications

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“…Many studies have reported that thermal annealing can partially remove the adsorbed organic contaminants [36][37]. In order to further verify the effect of adsorbed organic matters on surface wettability, the aged super-hydrophobic Al-IV surface was annealed in Ar at 350 °C for 2h.…”

Section: Thermal Annealing Experimentsmentioning

confidence: 99%

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

Yang

Liu

Tian

2019

Journal of Colloid and Interface Science

220

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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 gradual super-hydrophobic transition, which can be proved by the thermal annealing experiment. Particularly, to clearly explore the wettability transition mechanism, we extensively discussed why the laser-induced freshly outer layer was super-hydrophilic and how the airborne hydrocarbons were chemisorbed. This work not only provides useful insights into the formation mechanism of laser ablated super-hydrophobic surfaces, but also further guides industry to effectively modify surface chemistry to reduce wettability transition period and rapidly produce stable and durable super-hydrophobic surfaces.

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Section: Thermal Annealing Experimentsmentioning

confidence: 99%

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

Yang

Liu

Tian

2019

Journal of Colloid and Interface Science

220

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“…Often, ethanol, acetone, isopropyl and (ultra) pure or dionized water are used to remove impurities before the laser treatment (LT) or residues after LT. Further studies used acetone before LT [ 22 , 34 , 35 , 36 ], after LT [ 22 , 26 , 35 , 36 , 37 ] or cleaning with water followed by acetone [ 38 ]. The same applies for ethanol, which is used before [ 35 , 36 , 39 , 40 ] and after LT [ 35 , 36 , 41 ], and isopropanol, which is also used before [ 42 ] and after LT [ 43 ]. Especially in terms of biomedical applications alcohols play a special role, for disinfecting surfaces or for preparing in vitro and in vivo experiments [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Solvents on the Wetting Behavior Over Time of Femtosecond Laser Structured Ti6Al4V Surfaces

et al. 2020

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The effect of chemical solvents on the wetting state of laser-structured surfaces over time is systematically examined in this paper. By using a 300-fs laser, nanostructures were generated on Ti6Al4V, subsequently cleaned in an ultrasonic bath with different solvents and stored in ambient air. The static contact angle showed significant differences for cleaning with various solvents, which, depending on the applied cleaning and time, amounted up to 100°. X-ray photoelectron spectroscopy analyses reveal that the cleaning of the laser-structured surfaces affects the surface chemistry and the aging behavior of the surfaces, even with highly volatile solvents. The effect of the chemical surface modification is particularly noticeable when using alcohols for cleaning, which, due to their OH groups, cause highly hydrophilic behavior of the surface after one day of storage. Over the course of 14 days, enrichment with organic groups from the atmosphere occurs on the surface, which leads to poorer wetting on almost every structured surface. In contrast, the cleaning in hexane leads to a fast saturation of the surface with long-chain carbon groups and thus to a time-independent hydrophobic behavior.

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“…Subsequently, the rough surface was modified using low-surface-energy materials. Recently, superhydrophobic surfaces have been extensively fabricated on different substrate materials such as titanium [ 17 , 18 ], magnesium [ 19 , 20 ], aluminium [ 21 ], and copper alloys [ 22 , 23 ]. However, the effective transformation of traditional metallic materials with high surface energy to superhydrophobic surfaces remains challenging.…”

Section: Introductionmentioning

confidence: 99%

Facile Electrochemical Method for the Fabrication of Stable Corrosion-Resistant Superhydrophobic Surfaces on Zr-Based Bulk Metallic Glasses

Zhang

Sun

et al. 2021

Molecules

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Both surface microstructure and low surface energy modification play a vital role in the preparation of superhydrophobic surfaces. In this study, a safe and simple electrochemical method was developed to fabricate superhydrophobic surfaces of Zr-based metallic glasses with high corrosion resistance. First, micro–nano composite structures were generated on the surface of Zr-based metallic glasses by electrochemical etching in NaCl solution. Next, stearic acid was used to decrease surface energy. The effects of electrochemical etching time on surface morphology and wettability were also investigated through scanning electron microscopy and contact angle measurements. Furthermore, the influence of micro–nano composite structures and roughness on the wettability of Zr-based metallic glasses was analysed on the basis of the Cassie–Baxter model. The water contact angle of the surface was 154.3° ± 2.2°, and the sliding angle was < 5°, indicating good superhydrophobicity. Moreover, the potentiodynamic polarisation test and electrochemical impedance spectroscopy suggested excellent corrosion resistance performance, and the inhibition efficiency of the superhydrophobic surface reached 99.6%. Finally, the prepared superhydrophobic surface revealed excellent temperature-resistant and self-cleaning properties.

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Nanosecond laser ablated copper superhydrophobic surface with tunable ultrahigh adhesion and its renewability with low temperature annealing

Cited by 70 publications

References 41 publications

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

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

Effect of Chemical Solvents on the Wetting Behavior Over Time of Femtosecond Laser Structured Ti6Al4V Surfaces

Facile Electrochemical Method for the Fabrication of Stable Corrosion-Resistant Superhydrophobic Surfaces on Zr-Based Bulk Metallic Glasses

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