Development of an Analytical Model for Optimization of Direct Laser Interference Patterning

Voisiat, Bogdan; Aguilar‐Morales, Alfredo I.; Kunze, Tim; Lasagni, Andrés Fabían

doi:10.3390/ma13010200

Cited by 14 publications

(18 citation statements)

References 25 publications

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“…2. The results reveal a monotonic increase of the structure depths as the number of laser pulses increases, which can be well described by photo-thermal ablation behavior 43,44 . For the 4.6 µm period, the structure height tends to saturate after ~ 120 pulses (see Fig.…”

Section: Resultsmentioning

confidence: 70%

Wettability control of polymeric microstructures replicated from laser-patterned stamps

Soldera

Wang

et al. 2020

Sci Rep

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In this study, two-step approaches to fabricate periodic microstructures on polyethylene terephthalate (PET) and poly(methyl methacrylate) (PMMA) substrates are presented to control the wettability of polymeric surfaces. Micropillar arrays with periods between 1.6 and 4.6 µm are patterned by plate-to-plate hot embossing using chromium stamps structured by four-beam Direct Laser Interference Patterning (DLIP). By varying the laser parameters, the shape, spatial period, and structure height of the laser-induced topography on Cr stamps are controlled. After that, the wettability properties, namely the static, advancing/receding contact angles (CAs), and contact angle hysteresis were characterized on the patterned PET and PMMA surfaces. The results indicate that the micropillar arrays induced a hydrophobic state in both polymers with CAs up to 140° in the case of PET, without modifying the surface chemistry. However, the structured surfaces show high adhesion to water, as the droplets stick to the surfaces and do not roll down even upon turning the substrates upside down. To investigate the wetting state on the structured polymers, theoretical CAs predicted by Wenzel and Cassie-Baxter models for selected structured samples with different topographical characteristics are also calculated and compared with the experimental data.

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Section: Resultsmentioning

confidence: 70%

Wettability control of polymeric microstructures replicated from laser-patterned stamps

Soldera

Wang

et al. 2020

Sci Rep

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“…DLIP is an efficient LST approach that employs the interference of coherent laser beams on a material surface to create a periodic pattern of structures with high resolution [55]. This technology is effective for fast patterning of large surface areas with features down to nanometre-scale [55,56]. The DLIP process provides better flexibility in the choice of target material and texture geometry.…”

Section: Lst By Dlipmentioning

confidence: 99%

“…The DLIP method was shown to be effective in treating different materials and in creating advanced structures for a large variety of applications such as in optoelectronics, manufacturing of micro lenses, improvement in the growth of nanorods, and tissue engineering for sensing humidity and producing scaffolds [56,[58][59][60]. Processing speeds of 0.36 m 2 ∕ min and 0.9 m 2 ∕ min can be achieved on metals and polymers, respectively [53,55].…”

Section: Lst By Dlipmentioning

confidence: 99%

Micro-texturing of polymer surfaces using lasers: a review

Obilor

Pacella

Wilson

et al. 2022

Int J Adv Manuf Technol

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Micro- and nanoscale structures produced on surfaces of metals, polymers, ceramics, and glasses have many important applications in different fields such as engineering, medical, biological, etc. Laser ablation using ultrashort pulses has become the prominent technique for generating different surface structures for various functional applications. Ultrashort laser ablation proved to be ideal for producing structures with dimensions down to the nanometre scale. In comparison to other texturing techniques employed to create micro/nano features such as electrochemical machining, micro-milling, ion-beam etching, hot embossing, lithography, and mechanical texturing, ultrashort laser ablation produces high-quality surfaces at low cost in a one-step non-contact process. Advantageous characteristics of polymers such as high strength-to-weight ratio, non-corrosive nature, and high electrical and thermal resistance, have made polymers the preferred choice compared to other materials (e.g., steel, aluminium, titanium) in several fields of application. As a result, laser ablation of polymers has been of great interest for many researchers. This paper reviews the current state-of-the art research and recent progress in laser ablation of polymers starting from laser-material interaction, polymer properties influenced by laser, laser texturing methods, and achievable surface functionalities such as adhesion, friction, self-cleaning, and hydrophilicity on commonly used polymeric materials. It also highlights the capabilities and drawbacks of various micro-texturing techniques while identifying texture geometries that can be generated with these techniques. In general, the objective of this work is to present a thorough review on laser ablation and laser surface modification of a variety of industrially used polymers. Since direct laser interference patterning is an emerging area, considerable attention is given to this technique with the aim of forming a basis for follow-up research that could pave the way for potential technological ideas and optimization towards obtaining complex high-resolution features for future novel applications.

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“…r Direct laser interference patterning (DLIP) is beneficial when a periodical texture is needed with a period from tens of micrometers down to hundreds of nanometers [73], [76].…”

Section: B Surface Texturingmentioning

confidence: 99%

Ultra-Short Pulse Lasers for Microfabrication: A Review

Račiukaitis

2021

IEEE J. Select. Topics Quantum Electron.

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Ultra-short pulse lasers, generating coherent light pulses with pulse durations in the picosecond and femtosecond range, are becoming popular in precision laser microfabrication. They are benefiting not only from well-predicted laser ablation with the suppressed heat-affected zone but also by opening new processing opportunities, especially in transparent materials, due to enhanced non-linear interaction with the material. In this review, the evolution of various kinds of mode-locked lasers from a scientific toy to a robust industrial tool is reviewed. The utilization benefits of high-average-power, high-pulse-repetition-rate ultra-short pulse laser are closely related to beam shaping and manipulation techniques. Fast beam scanning with galvanometric and polygon scanners as well as multi-beam parallel processing methods were developed. Some hot applications areas are briefly described. The efficient use of photons from ultra-short pulse lasers pushed the development of optimization methods in the ablation process. Efforts toward upscaling the process by increasing the average power of mode-locked lasers made feedback to laser developers, and burst regime became a necessity as well as high-speed beam scanning devices. Unique opportunities of ultra-short pulses are successfully exploited in machining transparent materials, with glass separation being the leading application.

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Development of an Analytical Model for Optimization of Direct Laser Interference Patterning

Cited by 14 publications

References 25 publications

Wettability control of polymeric microstructures replicated from laser-patterned stamps

Wettability control of polymeric microstructures replicated from laser-patterned stamps

Micro-texturing of polymer surfaces using lasers: a review

Ultra-Short Pulse Lasers for Microfabrication: A Review

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