Patterned Superhydrophobic Metallic Surfaces

Kietzig, Anne‐Marie; Hatzikiriakos, Savvas G.; Englezos, Peter

doi:10.1021/la8037582

Cited by 704 publications

(524 citation statements)

References 38 publications

(54 reference statements)

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“…Large varieties of nano-and microstructures that result in superhydrophobic surfaces have been created on metal surfaces by fs laser micromachining, mostly on stainless steel [81,114,115]. Generally, surface chemistry or surface structures alone are not capable to show superhydrophobic behaviour.…”

Section: Applicationsmentioning

confidence: 99%

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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Abstract:Femtosecond laser micromachining has emerged in recent years as a new technique for micro/nano structure fabrication because of its applicability to virtually all kinds of materials in an easy one-step process that is scalable. In the past, much research on femtosecond laser micromachining was carried out to understand the complex ablation mechanism, whereas recent works are mostly concerned with the fabrication of surface structures because of their numerous possible applications. The state-of-the-art knowledge on the fabrication of these structures on metals with direct femtosecond laser micromachining is reviewed in this article. The effect of various parameters, such as fluence, number of pulses, laser beam polarization, wavelength, incident angle, scan velocity, number of scans, and environment, on the formation of different structures is discussed in detail wherever possible. Furthermore, a guideline for surface structures optimization is provided. The authors' experimental work on laser-inscribed regular pattern fabrication is presented to give a complete picture of micromachining processes. Finally, possible applications of laser-machined surface structures in different fields are briefly reviewed.

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Section: Applicationsmentioning

confidence: 99%

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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“…The use of laser surface texturing for wettability control has been reported on polymeric 14,15 and metallic materials. [16][17][18] The works reporting microsurface textures result in limited changes in contact angle, whereas the use of nanometric surface textures obtained with ripple patterns using ultrashort pulses results in highly hydrophobic surfaces. [16][17][18] This phenomenon is the consequence of the air entrapment as explained in Cassie-Baxter model.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18] The works reporting microsurface textures result in limited changes in contact angle, whereas the use of nanometric surface textures obtained with ripple patterns using ultrashort pulses results in highly hydrophobic surfaces. [16][17][18] This phenomenon is the consequence of the air entrapment as explained in Cassie-Baxter model. Moreover, the dependence of contact angle of the textured surfaces on time has been also reported.…”

Section: Introductionmentioning

confidence: 99%

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Laser surface structuring of AZ31 Mg alloy for controlled wettability

et al. 2014

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Structured surfaces exhibit functional properties that can enhance the performance of a bioimplant in terms of biocompatibility, adhesion, or corrosion behavior. In order to tailor the surface property, chemical and physical methods can be used in a sequence of many steps. On the other hand, laser surface processing can provide a single step solution to achieve the designated surface function with the use of simpler equipment and high repeatability. This work provides the details on the surface structuring of AZ31, a biocompatible and biodegradable Mg alloy, by a single-step laser surface structuring based on remelting. The surfaces are characterized in terms of topography, chemistry, and physical integrity, as well as the effective change in the surface wetting behavior is demonstrated. The results imply a great potential in local or complete surface structuring of medical implants for functionalization by the flexible positioning of the laser beam.

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“…Another open point is the influence of the surface chemistry induced by the laser processing on the bacterial attachment. The laser treatment induces the formation of a layer of oxide [54]. However, it is not clear how the interaction between this layer and the cell wall or the extracellular polymeric substance influences bacterial adhesion.…”

Section: Further Developmentmentioning

confidence: 99%

Design and characterization of textured surfaces for applications in the food industry

Lazzini¹,

Romoli²,

Blunt³

et al. 2017

Surf. Topogr.: Metrol. Prop.

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Description of two-process surface topography W Grabon and P Pawlus -A study of variations of areal parameters on machined surfaces P Pawlus, W Grabo, R Reizer et al. AbstractThe aim of this work is to design, manufacture and characterize surface morphologies on AISI 316L stainless steel produced by a custom designed laser-texturing strategy. Surface textures were characterized at a micrometric dimension in terms of areal parameters compliant with ISO 25178, and correlations between these parameters and processing parameters (e.g. laser energy dose supplied to the material, repetition rate of the laser pulses and scanning velocity) were investigated. Preliminary efforts were devoted to the research of special requirements for surface morphology that, according to the commonly accepted research on the influence of surface roughness on cellular adhesion on surfaces, should discourage the formation of biofilms. The topographical characterization of the surfaces was performed with a coherence scanning interferometer. This approach showed that increasing doses of energy to the surfaces increased the global level of roughness as well as the surface complexity. Moreover, the behavior of the parameters S pk , S vk also indicates that, due to the ablation process, an increase in the energy dose causes an average increase in the height of the highest peaks and in the depth of the deepest dales. The study of the density of peaks S pd showed that none of the surfaces analyzed here seem to perfectly match the conditions dictated by the theories on cellular adhesion to confer anti-biofouling properties. However, this result seems to be mainly due to the limits of the resolving power of coherence scanning interferometry, which does not allow the resolution of submicrometric features which could be crucial in the prevention of cellular attachment.

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Patterned Superhydrophobic Metallic Surfaces

Cited by 704 publications

References 38 publications

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Laser surface structuring of AZ31 Mg alloy for controlled wettability

Design and characterization of textured surfaces for applications in the food industry

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