Influence of laser parameters on superhydrophobicity- A review

Raja, R.; Selvakumar, P.; Бабу, П. Динеш; Rubasingh, B Jacob; Suresh, K Sitaraman

doi:10.1088/2631-8695/abf35f

Cited by 16 publications

(5 citation statements)

References 95 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In manufacturing and previous literature, LST was applied to modify the chemical composition, morphology, and roughness of a surface (wettability), cleaning (remove contaminants), reducing internal stresses of metals (hardening, tempering, etc. ), surface energy (polymers and metals), increasing the strength for adhesion (hybrid joining) and so on [15][16][17][18][19][20][21][22][23]. In the application of LST there is a wide variety of equipment and methods that can be used, but the most used is the nanosecond pulsed laser, followed by the picosecond laser and the femtosecond laser.…”

Section: Introductionmentioning

confidence: 99%

Wettability and Surface Roughness Analysis of Laser Surface Texturing of AISI 430 Stainless Steel

et al. 2022

View full text Add to dashboard Cite

Due to its wide applicability in industry, devising microstructures on the surface of materials can be easily implemented and automated in technological processes. Laser Surface Texturing (LST) is applied to modify the chemical composition, morphology, and roughness of surfaces (wettability), cleaning (remove contaminants), reducing internal stresses of metals (hardening, tempering), surface energy (polymers, metals), increasing the adhesion (hybrid joining, bioengineering) and decreasing the growth of pathogenic bacteria (bioengineering). This paper is a continuation and extension of our previous studies in laser-assisted texturing of surfaces. Three different patterns (crater array-type C, two ellipses at 90° overlapping with its mirror-type B and 3 concentric octagons-type A) were applied with a nanosecond pulsed laser (active medium Nd: Fiber Diode-pumped) on the surface of a ferritic stainless steel (AISI 430). Micro texturing the surface of a material can modify its wettability behavior. A hydrophobic surface (contact angle greater than 90°) was obtained with different variations depending on the parameters. The analysis performed in this research (surface roughness, wettability) is critical for assessing the surface functionality, characteristics and properties of the stainless steel surface after the LST process. The values of the surface roughness and the contact angle are directly proportional to the number of repetitions and inversely proportional to the speed. Recommendations for the use of different texturing pattern designs are also made.

show abstract

Section: Introductionmentioning

confidence: 99%

Wettability and Surface Roughness Analysis of Laser Surface Texturing of AISI 430 Stainless Steel

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The C-C/C-H group is nonpolar, which is beneficial to surface hydrophobicity. Hydroxylation may happen as a result of a surface crystalline defect (or ultrafine grain structure) after laser-ablated surface [31][32][33]. More stable CA on laser-based textures after HT because of the homogeneous distribution of Cu2O and C-H groups on all surface areas.…”

Section: Surface Composition Analysismentioning

confidence: 99%

Fast Fabrication of Superhydrophobic Copper Alloy Fabricated by Commercial Fiber Laser-1062 nm and Stability of Superhydrophobic Surface

Haryono,

Lin,

Thant

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

We present a fast, straightforward fabrication method to produce stable superhydrophobic copper alloy surfaces. The technique consists of irradiating copper with a fiber laser and then coating the surface with ethanol. The laser ablation generates surface morphology on the copper surfaces, such as line and grid patterns. We can modify the wetting properties and surface morphology by changing the step size. We assessed the change of the water contact angle on the raw surface, laser-based textures after natural aging, and laser-based textures post-low annealing. After that, we measured the stability of the water contact angle till 120 days. After low annealing heat treatment, water contact angles on grid pattern surfaces have superhydrophobic surfaces and are more stable till 120 days.

show abstract

“…On the other hand, the use of this Cassie model modified in accordance with the surface geometry can be effective in the study of non-stochastic structures obtained by laser processing [28], anisotropic chemical etching of the silicon surface [29], etc.…”

Section: Determining the Distribution Of The Liquid Contact Surfacementioning

confidence: 99%

Wetting Patterns of Liquid-Repellent Femtosecond Laser Textured Aluminum Surfaces

et al. 2022

View full text Add to dashboard Cite

Although liquid-repellent surfaces are in demand in many applications, their use is limited by the Cassie state’s sustainability to environmental factors, such as the repellency of liquids with a surface tension lower than that of water. This phenomenon remains not fully understood, despite a well-developed theory. In the current work, wetting of femtosecond laser-textured aluminum surfaces for probe liquids with a surface tension of 72.8–21.2 mN/m was considered. The resulting patterns were an array of pillars at the micro level and fractal-like structures at the nano level. These structured surfaces were treated with alkoxysilanes and oleic acid. All textured samples exhibited a Cassie state with water, and contact angles greater than 150° were achieved with silane-treated surfaces. A decrease in the surface tension of the probe liquid led to а transition to the Wetzel state at 44–46 mN/m for alkoxysilanes and at 52 mN/m for oleic acid. A typical shape of the textured surface wetting curve is proposed. It was shown that the determined values of the surface tension of the Cassie-Wenzel transition were 10–15 mN/m lower than those predicted by the Cassie equations.

show abstract

Influence of laser parameters on superhydrophobicity- A review

Cited by 16 publications

References 95 publications

Wettability and Surface Roughness Analysis of Laser Surface Texturing of AISI 430 Stainless Steel

Wettability and Surface Roughness Analysis of Laser Surface Texturing of AISI 430 Stainless Steel

Fast Fabrication of Superhydrophobic Copper Alloy Fabricated by Commercial Fiber Laser-1062 nm and Stability of Superhydrophobic Surface

Wetting Patterns of Liquid-Repellent Femtosecond Laser Textured Aluminum Surfaces

Contact Info

Product

Resources

About