Fabrication of sub-micron surface structures on copper, stainless steel and titanium using picosecond laser interference patterning

Bieda, Matthias; Siebold, M.; Lasagni, Andrés Fabían

doi:10.1016/j.apsusc.2016.06.100

Cited by 98 publications

(57 citation statements)

References 49 publications

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“…The beam source was a picosecond‐pulsed laser system with 1064 nm wavelength and 10 ps pulse duration (Edgewave PX200‐3). With this ultra‐short pulsed system, metals with high thermal conductivity (i.e., aluminum and copper) can be structured down to the submicrometer range . Figure shows the process principle as well as the laser energy distribution, that is, obtained by the overlap of two laser beams.…”

Section: Methodsmentioning

confidence: 99%

“…A laser‐based process for the production of textured surfaces on different materials is Direct Laser Interfering Patterning (DLIP). This technology is capable of producing periodic structures by transferring the shape of an interference pattern directly to the sample surface through either photothermal or photochemical interaction processes . To create an interference pattern, a laser beam is split into several sub‐beams, which recombine on the material surface.…”

Section: Introductionmentioning

confidence: 99%

“…This method has already been used to control friction and wear, improve optical properties, and control cell adhesion, and proliferation . In addition, DLIP was used to control the contact resistance between copper and tin in a plug contact with a reduction of up to 73%…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the Electrical Conductivity between Electrode and Sheet in Spot Welding Process by Direct Laser Interference Patterning

et al. 2018

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The effort of automotive industry is the increasingly use of aluminum alloys to reduce the weight of the car. Regarding the lifetime of electrodes and the process reliability resistance, spot welding is not applied for joining of aluminum sheets. Instead, more expensive processes must be used, like riveting with supplementary component. This is caused by the electric isolating oxide layer at the sheet surface. This layer normally shows an irregular topography, causing a locale temperature increase and therefore high electrode wear. In this study, a new concept to increase the electrode lifetime and process reliability is reported. Using Direct Laser Interference Patterning, periodic surface patterns are produced at the contact area between the electrode and the sheet for influencing the contact resistance. The resulting topography and morphology are analyzed by confocal microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The electrical resistance between the contact partners copper and aluminum is measured during spot welding tests and contact resistance studies. A reduction up to 50% of the electrical resistance by treating the electrodes or an increase of more than 100 times by treating the sheets can be achieved compared to the untreated references.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of the Electrical Conductivity between Electrode and Sheet in Spot Welding Process by Direct Laser Interference Patterning

et al. 2018

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“…To overcome this limitation and obtain high-throughput and cost-effectiveness, we propose the application of direct laser interference patterning. Direct patterning using high-peak-power laser interference has been previously shown as a suitable tool for large-area microstructuring of metals, [30][31][32][33][34][35][36][37][38][39] organic materials, [40][41][42] and even Si. [43][44][45][46][47][48][49][50] It does not require resist, etching or any other post-processing steps, thus is relatively fast and simple.…”

Section: Introductionmentioning

confidence: 99%

Direct and High-Throughput Fabrication of Mie-Resonant MetasurfacesviaSingle-Pulse Laser Interference

et al. 2020

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High-index dielectric metasurfaces featuring Mie-type electric and magnetic resonances have been of a great interest in a variety of applications such as imaging, sensing, photovoltaics and others, which led to the necessity of an efficient large-scale fabrication technique. To address this, here we demonstrate the use of single-pulse laser interference for direct patterning of an amorphous silicon film into an array of Mie resonators. The proposed technique is based on laser-interference-induced dewetting. A precise control of the laser pulse energy enables the fabrication of ordered dielectric metasurfaces in areas spanning tens of micrometers and consisting of thousands of hemispherical nanoparticles with a single laser shot. The fabricated nanoparticles exhibit a wavelength-dependent optical response with a strong electric dipole signature. Variation of the pre-deposited silicon film thickness allows tailoring of the resonances in the targeted visible and infrared spectral ranges. Such direct and highthroughput fabrication paves the way towards a simple realization of spatially invariant metasurface-based devices.Keywords dielectric nanostructures, silicon resonators, metasurfaces, laser-matter interaction, direct laser interference patterning, multi-beam interference

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“…Engineering of functionality in materials to imitate biotic structures (termed biomimetics) has recently become a widely used approach . Microfabrication technology is indispensable for biomimetics, and its mainstream techniques are nanoimprinting and laser processing . However, the current microfabrication methods have both advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Wettability of a microgrid‐structured polymer film with microfabrication utilizing the stick–slip phenomenon

Naito

Yamada

Tsutsumi

et al. 2017

J of Applied Polymer Sci

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A microgrid structure was formed on the surface of a polyethylene terephthalate (PET) film with an original microfabrication method (termed SS processing) utilizing the stick–slip (SS) phenomenon, and the effect of this surface structure on wettability was evaluated. Microgrid‐structured films could be fabricated by two‐axis SS processing. Moreover, an arbitrary parallelogram microgrid structure could be formed by selecting the direction of the second SS processing with respect to that of the first SS processing. Both water contact angle and water sliding angle of the SS‐processed film were larger than that of the PET film. Hence, the SS‐processed film showed a petal‐like effect. Furthermore, the water sliding angle of the microgrid‐structured film showed anisotropy due to the pinning effect derived from the microgrid structure. As a result, it is revealed that a hydrophobic PET film with a petal‐like effect and anisotropic wettability can be fabricated by SS processing. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45140.

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Fabrication of sub-micron surface structures on copper, stainless steel and titanium using picosecond laser interference patterning

Cited by 98 publications

References 49 publications

Improvement of the Electrical Conductivity between Electrode and Sheet in Spot Welding Process by Direct Laser Interference Patterning

Improvement of the Electrical Conductivity between Electrode and Sheet in Spot Welding Process by Direct Laser Interference Patterning

Direct and High-Throughput Fabrication of Mie-Resonant MetasurfacesviaSingle-Pulse Laser Interference

Wettability of a microgrid‐structured polymer film with microfabrication utilizing the stick–slip phenomenon

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