High throughput laser surface micro-structuring of polystyrene by combining direct laser interference patterning with polygon scanner technology

Ränke, Fabian; Baumann, Robert; Voisiat, Bogdan; Lasagni, Andrés Fabían

doi:10.1016/j.mlblux.2022.100144

Cited by 12 publications

(23 citation statements)

References 6 publications

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“…With modern beam delivery techniques, such as polygon scanners, line‐like patterning with process throughput over 1 m 2 min −1 were already reached. [ 20 ]…”

Section: Resultsmentioning

confidence: 99%

“…With modern beam delivery techniques, such as polygon scanners, line-like patterning with process throughput over 1 m 2 min −1 were already reached. [20] In Figure 1b, the topography of line-like DLIP structures with spot-to-spot distances of 10, 25, and 75 µm with a fixed spatial period of 3.1 µm can be observed. Since for the DLIP treatment a 10 ps laser source was used, no significant molten and redeposited material can be detected.…”

Section: Laser Texturing Of Single and Multiscaled Metallic Stampsmentioning

confidence: 96%

“…In turn, laser-texturing methods, such as direct laser writing (DLW) and direct laser interference patterning (DLIP), are single-step processes that stand out for their potential for scalability toward industrial applications, while having a large flexibility and control on the microtexture shape and feature sizes. [20][21][22][23][24] In DLW, a single laser beam is focused and guided over a solid surface in order to remove or remelt material. For microtexturing, feature resolutions of 5-30 µm already have been reported.…”

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confidence: 99%

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Spreading Behavior of Oil on Hierarchical Microstructured PET Surfaces Fabricated Using Hot‐Embossing Combined with Laser‐Based Methods

Bouchard

Soldera

Lasagni

2023

Adv Materials Inter

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In this study, the wetting behavior of microstructured polyethylene terephthalate (PET) foils for polar and nonpolar liquids produced by plate‐to‐plate hot embossing is investigated. For the embossing step, stainless steel plates are used as stamps, which are microstructured with single‐scaled and hierarchical textures using direct laser writing and two‐beam direct laser interference patterning. The imprinted microstructures, containing pillar‐ and line‐like textures, show increased water contact angles combined with a superoleophilic behavior. Time‐resolved measurements reveal that oil droplets spread rapidly on the hierarchical textures with velocities of up to 1.4 mm2 s−1. This functionalization of PET foils creates new opportunities for a wide range of industrial applications, such as the use of oil‐based instead of solvent‐based paints, an improved distribution of lubricants in mechanical components or for oil–water separation in maritime surroundings.

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“…With modern beam delivery techniques, such as polygon scanners, line‐like patterning with process throughput over 1 m 2 min −1 were already reached. [ 20 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Laser Texturing Of Single and Multiscaled Metallic Stampsmentioning

confidence: 96%

mentioning

confidence: 99%

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Spreading Behavior of Oil on Hierarchical Microstructured PET Surfaces Fabricated Using Hot‐Embossing Combined with Laser‐Based Methods

Bouchard

Soldera

Lasagni

2023

Adv Materials Inter

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“…[10,11] Among the laserbased manufacturing methods, direct laser interference patterning (DLIP) is an advanced method for periodic surface structuring due to its high flexibility, resolution, and high throughputs. [12][13][14] This laser technology is based on the phenomenon of interference. Here, a laser beam is split into several partial beams using, for example, a diffractive optical element.…”

Section: Introductionmentioning

confidence: 99%

Diffraction‐Based Strategy for Monitoring Topographical Features Fabricated by Direct Laser Interference Patterning

et al. 2023

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“…[ 21,22 ] Among those, Direct Laser Interference Patterning (DLIP) has emerged as a versatile tool to fabricate periodic micro‐ and nanotextures in a single processing step with an exceptionally high process scalability. [ 23 ] Another common technique is the fabrication of laser‐induced periodic surface structures (LIPSS), such as low spatial frequency LIPSS (LSFL) with periods close to the laser wavelength and high spatial frequency LIPSS (HSFL) with periods smaller than half the wavelength. [ 24 ] In Ti‐13Nb‐13Zr alloys, DLIP can be used to fabricate single‐scale surface textures (using nanosecond‐pulse lasers (ns)) and multi‐scale surface textures comprised of interference patterns and LIPSS when employing ultra‐short (femto‐ and picosecond (ps)) pulse lasers.…”

Section: Introductionmentioning

confidence: 99%

Single‐ and Multiscale Laser Patterning of 3D Printed Biomedical Titanium Alloy: Toward an Enhanced Adhesion and Early Differentiation of Human Bone Marrow Stromal Cells

Hariharan,

Goldberg,

Schell

et al. 2023

Adv Funct Materials

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This study explores the enhancement of biocompatible titanium‐based implants through surface functionalization for improved bone healing. Specifically, a near‐beta type Ti‐13Nb‐13Zr alloy is 3D printed using laser powder bed fusion and subsequently textured using nanosecond (ns) and picosecond (ps) direct laser interference patterning (DLIP) to create single‐scale and multi‐scale surface textures. On these textures, the cell behavior, morphology, metabolic activity and osteogenic differentiation potential of human bone marrow stromal cells are assessed using fluorescence microscopy and MTS assays. Moreover, tissue non‐specific alkaline phosphatase activity served as an early osteoblast production marker. Compared to untextured specimens, both types of textures exhibited higher metabolic activity and cell proliferation. Single‐scale ns‐DLIP textures encouraged cell extensions anchored in groove regions, while ps‐DLIP textures with hierarchical structures promoted cell extensions attaching to nanostructures on sidewalls. The groove width and nanotopographies in groove areas facilitated cell spreading. Surface topography, roughness, and surface chemistry (surface energy, wettability) influenced cell adhesion, proliferation, and differentiation. A comprehensive evaluation of DLIP‐generated surface textures, including their topography and chemical states, complements the factors affecting in vitro cell behavior. Overall, this research demonstrates the potential of surface‐functionalized 3Dprinted titanium for a novel generation of biocompatible implants.

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High throughput laser surface micro-structuring of polystyrene by combining direct laser interference patterning with polygon scanner technology

Cited by 12 publications

References 6 publications

Spreading Behavior of Oil on Hierarchical Microstructured PET Surfaces Fabricated Using Hot‐Embossing Combined with Laser‐Based Methods

Spreading Behavior of Oil on Hierarchical Microstructured PET Surfaces Fabricated Using Hot‐Embossing Combined with Laser‐Based Methods

Diffraction‐Based Strategy for Monitoring Topographical Features Fabricated by Direct Laser Interference Patterning

Single‐ and Multiscale Laser Patterning of 3D Printed Biomedical Titanium Alloy: Toward an Enhanced Adhesion and Early Differentiation of Human Bone Marrow Stromal Cells

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