Laser surface texturing of 316L stainless steel in air and water: A method for increasing hydrophilicity via direct creation of microstructures

Razi, Sepehr; Madanipour, Khosro; Mollabashi, Mahmoud

doi:10.1016/j.optlastec.2015.12.022

Cited by 79 publications

(33 citation statements)

References 51 publications

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“…Furthermore, when the surface particles were evaporated at high fluence, they reacted with the surrounding oxygen. Then the redepositing of these oxidised particles in addition to oxidised melted particle would occur [29,35,47]. However, the oxegen percentages of laser treated samples in water were lower than the oxygen percentages of surfaces treated in air.…”

Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

“…The surfaces generated in water were almost uniformly modified and that was free from redeposited particles. This might be related to the removal of ablated derbies and nanoparticles away due to the thermal convection of liquid or with the liquid movement [29,35,44]. The water contact angles of stainless steel surfaces with reducing the surface energy by the chemical treatment and without the laser treatment was measured and found to be as 90.19° ± 4.38°.…”

Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

“…Therefore, the amount of oxygen during laser processing in water was limited to the amount of oxygen of this small amount of water resulting in confining the interaction of the molten material with oxygen which in turn affected the final amount of surface oxygen contents. The prevention of redeposition of ablated particle as well as plasma shielding at high laser fluence, which prevents the surface interacting with the surrounding environment, might be another reason for low oxygen rate in water [29,35]. It was proved that the amount of adsorbed substances on the surface was dependent on the surface OH group density of metal oxide.…”

Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

“…Picosecond laser was used to generate superhydrophobic structures on stainless steel [29][30][31], cupper [32], titanium [33] and Al2O3 [34]. Stainless steel [35,36], aluminium [34,37], brass [38] and cupper [38] were textured using ns laser for producing a range of superhydrophobic surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Long term superhydrophobic and hybrid superhydrophobic/superhydrophilic surfaces produced by laser surface micro/nano surface structuring

Rajab

2019

Applied Surface Science

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Stable superhydrophobic and superhydrophilic surfaces were created using laser surface micro/nano patterning. These were based on periodic 3D micro/nanostructures produced on 316L stainless steel over large areas using nanosecond and picosecond laser surface fabrication. The effects of laser processing parameters on controlling the micro-/nano-topographical characteristics of 24 different types of structures were presented. Surface roughness, surface chemical composition and wettability (via water contact angle) of these surfaces were characterised. Aging experiments were carried out for up to 8 months to analyse the durability of the prepared surfaces under three conditions of water (hot, normal and icy). Samples with superhydrophobic characteristics, processed with the ps or ns lasers in air, kept dry (water repellent) for over 8 months when tested in ice water (0C-4C), whilst those stored in hot water (80C) or room temperature water could only be kept dry for 3-14 weeks. Samples processed in water had shorter water repellent life and samples processed with the ns laser in air had the longest water repellent periods. The hybrid superhydrophobic and superhydrophobic surfaces had a stability life for water repellent and water spreading of over 6 months.

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Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

Section: Aging Experiments Of Hydrophobic Surfacesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long term superhydrophobic and hybrid superhydrophobic/superhydrophilic surfaces produced by laser surface micro/nano surface structuring

Rajab

2019

Applied Surface Science

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“…In the field of non-contact manufacturing process, laser-based methods have shown a considerable development for mimicking natural examples. For instance, direct laser writing method have been used to control the wettability of surfaces using nanosecond [13,14], picosecond [15] and femtosecond [16][17][18][19] laser sources.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Surface Structuring Using Laser Based Interferometric Methods

et al. 2018

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This review investigates the capabilities of laser-based interferometric methods for producing structures with multiple-scaled surface features imitating natural examples. Firstly, laser interference lithography is used to produce hierarchical patterns with length-scales in the micrometer and sub-micrometer range. Different strategies are discussed to produce a wide variety of periodic arrays, depending on the number of resist lasers used as well as the way in which the exposure steps are organized. After that, periodic patterns are fabricated on polymers using ns laser pulses from an UV-laser system. Additionally in this case, multiple-scale patterns are produced by using different strategies. A similar approach is described to treat metallic surfaces of steel X6Cr17 and a titanium alloy Ti6Al4V. The geometry of the produced microstructures was characterized using scanning electron microscopy and confocal microscopy. Measurement of water contact angle is performed for both polymer and metallic surfaces.

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