Single‐step Production of Photocatalytic Surfaces via Direct Laser Interference Patterning of Titanium

Fox, Tobias; Maria Delfino, Pablo; Cortés, Francisco; Pauly, Christoph; Wyn Müller, Daniel; Briesenick, Max; Kickelbick, Guido; Mücklich, Frank

doi:10.1002/cnma.202300314

Cited by 5 publications

(1 citation statement)

References 54 publications

(101 reference statements)

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“…The study employed a femtosecond laser with linear polarization, a wavelength of 1030 nm, a pulse duration of 420 fs, a frequency of 100 kHz, a maximum output power of 2 W, and a beam diameter of 2.4 mm (at 1/e 2 ). In [130], a single-step method for creating porous photocatalytic surfaces on titanium substrates was introduced by DLIP with picosecond-range pulses. The study showcased the tunability of composition and morphology in the resulting surfaces, allowing customization for applications like antimicrobial surfaces, implant materials, or water treatment, utilizing a DLIP setup with a DOE and prism for versatile beam manipulation.…”

Section: Laser Surface Modification By Direct Laser Interference Patt...mentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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Laser processing is a versatile tool that enhances smart materials for diverse industries, allowing precise changes in material properties and customization of surface characteristics. It drives the development of smart materials with adaptive properties through laser modification, utilizing photothermal reactions and functional additives for meticulous control. These laser-processed smart materials form the foundation of 4D printing that enables dynamic shape changes depending on external influences, with significant potential in the aerospace, robotics, health care, electronics, and automotive sectors, thus fostering innovation. Laser processing also advances photonics and optoelectronics, facilitating precise control over optical properties and promoting responsive device development for various applications. The application of computer-generated diffractive optical elements (DOEs) enhances laser precision, allowing for predetermined temperature distribution and showcasing substantial promise in enhancing smart material properties. This comprehensive overview explores the applications of laser technology and nanotechnology involving DOEs, underscoring their transformative potential in the realms of photonics and optoelectronics. The growing potential for further research and practical applications in this field suggests promising prospects in the near future.

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Section: Laser Surface Modification By Direct Laser Interference Patt...mentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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Influence of Oxide Formation Following Ultrashort Pulsed Laser Micromachining on Self‐Propagating Reactions in Free‐Standing Ni/Al Reactive Multilayer Foils

Martins,

Schäfer,

Mücklich

et al. 2024

Adv Eng Mater

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Reactive metallic multilayers, renowned for their exothermic self‐propagating reactions, show a distinct ability to achieve minimal thermal influence in processes such as welding and soldering, where minimizing the thermal impact on the material being joined is crucial. Ultrashort pulsed lasers offer precision micromachining with negligible thermal damage, making them ideal for processing such sensitive materials. However, the formation and redeposition of oxide phases is a commonly observed side‐effect, especially when structuring in ambient air. This study investigates the effects of oxide formed after femtosecond laser treatment on self‐propagating properties, including propagation velocity and microstructure of Ni/Al reactive multilayer foils. Samples with varied line spacings between laser‐cut trenches are created. Scanning electron microscopy, high‐speed camera videography, and image analysis are employed to analyze the microstructure and quantify velocities. Thermal simulations enhanced the understanding of the oxide’s role in self‐propagating dynamics. The findings suggest that even a small oxide layer significantly decelerates the self‐propagating reaction. The oxide functions as a thermal ballast by absorbing the thermal energy generated during the reaction, without actively participating in the reaction mechanism.This article is protected by copyright. All rights reserved.

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Fabrication of Smooth, Periodic Surface Structures: Combining Direct Laser Interference Patterning and Electropolishing

Schäfer,

Delfino,

Leonhard‐Trautmann

et al. 2024

Adv Eng Mater

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The manipulation of topography is crucial in surface engineering to customize material properties and surface functionalities for specific applications. Scientists have been inspired by natural surfaces found in plants and animals and have increasingly used engineered surface structures to improve characteristics such as friction, wear, electrical resistance, wettability, and antimicrobial behavior across various fields. Direct Laser Interference Patterning (DLIP) is a technique that can rapidly create well‐defined, periodic surface structures. However, it can still face challenges such as surface roughness and non‐uniformity, which require complementary post‐processing techniques. This paper investigates the effectiveness of electropolishing in phosphoric acid as a post‐processing method for DLIP‐treated copper surfaces. Through systematic characterization and analysis, it is demonstrated that electropolishing selectively smoothens DLIP‐treated surfaces by removing undesired by‐products, such as oxides and redeposited material while retaining the underlying structure. The real surface area and, consequently, the S ratio is diminished by up to 13 %, while the root mean square roughness Rq along the topographic maxima of the line pattern is reduced by approximately 90 %. These findings contribute to the advancement of our understanding of surface modification techniques and their potential applications in diverse fields.This article is protected by copyright. All rights reserved.

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Single‐step Production of Photocatalytic Surfaces via Direct Laser Interference Patterning of Titanium

Cited by 5 publications

References 54 publications

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Influence of Oxide Formation Following Ultrashort Pulsed Laser Micromachining on Self‐Propagating Reactions in Free‐Standing Ni/Al Reactive Multilayer Foils

Fabrication of Smooth, Periodic Surface Structures: Combining Direct Laser Interference Patterning and Electropolishing

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