Log in

Relevant bibliographies by topics / Laser surface patterning / Journal articles

Journal articles on the topic 'Laser surface patterning'

To see the other types of publications on this topic, follow the link: Laser surface patterning.

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Laser surface patterning.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

You, Dong-Bin, Jun-Han Park, Bo-Seok Kang, Dan-Hee Yun, and Bo Sung Shin. "A Fundamental Study of a Surface Modification on Silicon Wafer Using Direct Laser Interference Patterning with 355-nm UV Laser." Science of Advanced Materials 12, no. 4 (April 1, 2020): 516–19. http://dx.doi.org/10.1166/sam.2020.3658.

Full text

Abstract:

The growing need for precision machining, which is difficult to achieve using conventional mechanical machining techniques, has fueled interest in laser patterning. Ultraviolet (UV) pulsed-lasers have been used in various applications, including the micro machining of polymers and metals. In this study, we investigated direct laser interference patterning of a silicon waver using a third-harmonic diode-pumped solid-state UV laser with a wavelength of 355 nm. Direct laser lithography is much more simple process compare to other submicro processing method. We have studied interference patterning for silicon wafers as a basic research for direct laser interference patterning on wafer surfaces without mask. And Finite element analysis (FEA) was performed for a 150° biprism using modeling software (COMSOL Multiphysics 5.4) to determine changes in the periodic patterns according to the focusing distance in the direct interference lithography experiment. In further study, we expect this technique to be applied to direct laser interference lithography on metals.

APA, Harvard, Vancouver, ISO, and other styles

2

Lyutakov, O., J. Tůma, I. Huttel, V. Prajzler, J. Siegel, and V. Švorčík. "Polymer surface patterning by laser scanning." Applied Physics B 110, no. 4 (January 9, 2013): 539–49. http://dx.doi.org/10.1007/s00340-012-5291-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Schröter, Anja, Mark Kalus, and Nils Hartmann. "Substrate-mediated effects in photothermal patterning of alkanethiol self-assembled monolayers with microfocused continuous-wave lasers." Beilstein Journal of Nanotechnology 3 (January 26, 2012): 65–74. http://dx.doi.org/10.3762/bjnano.3.8.

Full text

Abstract:

In recent years, self-assembled monolayers (SAMs) have been demonstrated to provide promising new approaches to nonlinear laser processing. Most notably, because of their ultrathin nature, indirect excitation mechanisms can be exploited in order to fabricate subwavelength structures. In photothermal processing, for example, microfocused lasers are used to locally heat the substrate surface and initiate desorption or decomposition of the coating. Because of the strongly temperature-dependent desorption kinetics, the overall process is highly nonlinear in the applied laser power. For this reason, subwavelength patterning is feasible employing ordinary continuous-wave lasers. The lateral resolution, generally, depends on both the type of the organic monolayer and the nature of the substrate. In previous studies we reported on photothermal patterning of distinct types of SAMs on Si supports. In this contribution, a systematic study on the impact of the substrate is presented. Alkanethiol SAMs on Au-coated glass and silicon substrates were patterned by using a microfocused laser beam at a wavelength of 532 nm. Temperature calculations and thermokinetic simulations were carried out in order to clarify the processes that determine the performance of the patterning technique. Because of the strongly temperature-dependent thermal conductivity of Si, surface-temperature profiles on Au/Si substrates are very narrow ensuring a particularly high lateral resolution. At a 1/e spot diameter of 2 µm, fabrication of subwavelength structures with diameters of 300–400 nm is feasible. Rapid heat dissipation, though, requires high laser powers. In contrast, patterning of SAMs on Au/glass substrates is strongly affected by the largely distinct heat conduction within the Au film and in the glass support. This results in broad surface temperature profiles. Hence, minimum structure sizes are larger when compared with respective values on Au/Si substrates. The required laser powers, though, are more than one order of magnitude lower. Also, the laser power needed for patterning decreases with decreasing Au layer thickness. These results demonstrate the impact of the substrate on the overall patterning process and provide new perspectives in photothermal laser patterning of ultrathin organic coatings.

APA, Harvard, Vancouver, ISO, and other styles

4

Khan, Ashfaq, Zengbo Wang, Mohammad A. Sheikh, and Lin Li. "Laser Sub-Micron Patterning of Rough Surfaces by Micro-Particle Lens Arrays." International Journal of Manufacturing, Materials, and Mechanical Engineering 1, no. 3 (July 2011): 1–9. http://dx.doi.org/10.4018/ijmmme.2011070101.

Full text

Abstract:

Laser surface patterning by Contact Particles Lens Arrays (CPLA) has been widely utilized for patterning of smooth surfaces but there is no technique developed by which CPLA can be deposited on a rough surface. For deposition of CPLA, conventional techniques require the surface to be flat, smooth and hydrophilic. In this study, a new method for the deposition of CPLA on a rough surface is proposed and utilized for patterning. In this method, a hexagonal closed pack monolayer of SiO2 spheres was first formed by self-assembly on a flat glass surface. The formed monolayer of particles was picked up by a flexible sticky surface and then placed on the rough surface to be patterned. A Nd:YVO4 laser was used to irradiate the substrate with the laser passing through the sticky plastic and the particles. Experimental investigations have been carried out to determine the properties of the patterns.

APA, Harvard, Vancouver, ISO, and other styles

5

Kasem, Haytam, Ori Stav, Philipp Grützmacher, and Carsten Gachot. "Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact." Lubricants 6, no. 3 (July 17, 2018): 62. http://dx.doi.org/10.3390/lubricants6030062.

Full text

Abstract:

Laser surface texturing is an interesting possibility to tailor materials’ surfaces and thus to improve the friction and wear properties if proper texture feature sizes are selected. In this research work, stainless steel surfaces were laser textured by two different laser techniques, i.e., the direct laser interference patterning by using a nanosecond pulsed Nd:YAG laser and additionally by an ultrashort pulsed femtosecond Ti:Sa. The as-textured surfaces were then studied regarding their frictional response in a specially designed linear reciprocating test rig under lubricated conditions with a fully formulated 15W40 oil. Results show that dimples with smaller diameter lead to a significant reduction in the coefficient of friction compared to the dimples with a larger diameter and surfaces with a grid-like surface pattern produced by direct laser interference patterning.

APA, Harvard, Vancouver, ISO, and other styles

6

Touya, Nicolas, Samy Al-Bourgol, Théo Désigaux, Olivia Kérourédan, Laura Gemini, Rainer Kling, and Raphaël Devillard. "Bone Laser Patterning to Decipher Cell Organization." Bioengineering 10, no. 2 (January 24, 2023): 155. http://dx.doi.org/10.3390/bioengineering10020155.

Full text

Abstract:

The laser patterning of implant materials for bone tissue engineering purposes has proven to be a promising technique for controlling cell properties such as adhesion or differentiation, resulting in enhanced osteointegration. However, the possibility of patterning the bone tissue side interface to generate microstructure effects has never been investigated. In the present study, three different laser-generated patterns were machined on the bone surface with the aim of identifying the best surface morphology compatible with osteogenic-related cell recolonization. The laser-patterned bone tissue was characterized by scanning electron microscopy and confocal microscopy in order to obtain a comprehensive picture of the bone surface morphology. The cortical bone patterning impact on cell compatibility and cytoskeleton rearrangement on the patterned surfaces was assessed using Stromal Cells from the Apical Papilla (SCAPs). The results indicated that laser machining had no detrimental effect on consecutively seeded cell metabolism. Orientation assays revealed that patterns with larger hatch distances were correlated with higher cell cytoskeletal conformation to the laser-machined patterns. To the best of our knowledge, this study is the first to consider and evaluate bone as a biological interface that can be engineered for improvement. Further investigations should focus on the in vivo implications of this direct patterning.

APA, Harvard, Vancouver, ISO, and other styles

7

Wengang, Chen, Ge Shirong, Pang Lianyun, and Zhang Yonghai. "Anti-friction property of surface patterning nano-hard film on the monocrystalline silicon surface." Industrial Lubrication and Tribology 66, no. 1 (February 4, 2014): 131–42. http://dx.doi.org/10.1108/ilt-08-2011-0064.

Full text

Abstract:

Purpose – Three types of pattern on the monocrystalline silicon surface were prepared by using laser surface processing equipment. The DLC film and Si-DLC film on the patterning surface were deposited by using PECVD-2D plasma chemical vapor deposition sets. The paper aims to discuss these issues. Design/methodology/approach – The tribological properties of the films were investigated by using the UMT-2 micro friction and wear tester. The surface topography, composition, hardness and elastic modular of the films were determined by Raman spectrum, nano mechanics tester and three-dimensional topography instrument. The worn surface topographies of the surface patterning films were tested by scanning electron microscopy. Findings – The results show that the patterning monocrystalline silicon substrate surface has good anti-friction property under low load. The patterning DLC film and Si-DLC film surface have very good anti-friction property under all the test loads. The reason of these results is that the surface patterning film not only reduces the real contact area of the friction pairs but also has low surface bonding force. Originality/value – This paper prepared three kinds of microscopic patterns on the monocrystalline silicon surface by using laser surface processing equipment. And then deposited DLC film and Si-DLC film on the patterning surface. All kinds of surface patterning monocrystalline silicon had very good anti-friction property under low load. And all kinds of surface patterning nano-hard film had perfect anti-friction property under all test loads.

APA, Harvard, Vancouver, ISO, and other styles

8

Chang, Cho-Wei, Chien-Yu Chen, Tien-Li Chang, Chia-Jen Ting, Chien-Ping Wang, and Chang-Pin Chou. "Sapphire surface patterning using femtosecond laser micromachining." Applied Physics A 109, no. 2 (July 18, 2012): 441–48. http://dx.doi.org/10.1007/s00339-012-7048-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Li, He, Junjie Zhang, Wenqi Ma, Yuan Liu, Xuesen Zhao, Zhenjiang Hu, Xiaohui Wang, Min Sheng, and Tao Sun. "Controlled Continuous Patterning of Spherical Stainless Steel by Multi-Axis Linkage Laser Milling." Micromachines 13, no. 8 (August 18, 2022): 1338. http://dx.doi.org/10.3390/mi13081338.

Full text

Abstract:

While laser surface texturing is promising for the fabrication of planar surface microstructures, the continuously patterning with micrometer accuracy of non-planar surface on miniature parts with large curvature by laser ablation is challenging. In the present work, we demonstrate the feasibility of applying the proposed multi-axis laser milling in continuous patterning of 25 mm diameter spherical stainless steel with high uniformity and precision, based on a strategy of simultaneously adjusting the position and the posture of laser-surface interaction point for enabling the constant coincidence of laser beam with ablated surface normal. Specifically, a miniaturized five-axis platform for controlling workpiece motion with high degree-of-freedom is designed and integrated with a fixed nanosecond pulsed laser beam operating at 1064 nm. The precise path of laser-surface interaction point is derived based on the projection and transformation of pre-determined planar pattern on spherical surface. Meanwhile, a virtual prototype of the multi-axis laser milling with embedded interpolation algorithm is established, which enables the generation of NC codes for subsequent laser milling experiments. Furthermore, the sampling of laser processing parameters particularly for spherical surface is carried out. Finally, complex patterns are continuously structured on the spherical surface by employing the proposed multi-axis laser milling method, and subsequent characterization demonstrates both long range uniformity and local high accuracy of the fabricated patterns. Current work provides a feasible method for the continuous laser surface texturing of non-planar surfaces for miniature parts with large curvature.

APA, Harvard, Vancouver, ISO, and other styles

10

Tomita, Takuro, Ryota Kumai, Keita Kinoshita, Shigeki Matsuo, Shuichi Hashimoto, Hirokazu Nagase, Makoto Nakajima, and T. Suemoto. "Femtosecond Laser-Induced Surface Patterning on 4H-SiC." Materials Science Forum 600-603 (September 2008): 879–82. http://dx.doi.org/10.4028/www.scientific.net/msf.600-603.879.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Piglmayer, K., R. Denk, and D. Bäuerle. "Laser-induced surface patterning by means of microspheres." Applied Physics Letters 80, no. 25 (June 24, 2002): 4693–95. http://dx.doi.org/10.1063/1.1489085.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Renn, Michael J. "Particle manipulation and surface patterning by laser guidance." Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 16, no. 6 (November 1998): 3859. http://dx.doi.org/10.1116/1.590424.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Costache, F., M. Henyk, and J. Reif. "Surface patterning on insulators upon femtosecond laser ablation." Applied Surface Science 208-209 (March 2003): 486–91. http://dx.doi.org/10.1016/s0169-4332(02)01443-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Zaraska, Krzysztof, Janina Gaudyn, Adam Bieńkowski, Andrzej Czerwiński, and Mariusz Płuska. "Surface Properties of Laser-etched LTCC Ceramic." International Symposium on Microelectronics 2011, no. 1 (January 1, 2011): 000735–39. http://dx.doi.org/10.4071/isom-2011-wp3-paper1.

Full text

Abstract:

In the LTCC process, metal layers are usually deposited by screen printing conductor material on unfired tape substrate. Despite being widely used, this method has certain disadvantages, such as limited resolution of the printing process. An alternative method of producing conductor patterns is to deposit a uniform conductor paste layer on the substrate and the use a Nd:YAG laser to selectively ablate the conductor material, producing a desired pattern. This method allows achieving a higher patterning precision and also eliminates photochemical process of screen preparation, which makes it an attractive choice for rapid prototyping applications. Laser ablation step can be performed either post-firing (for a top conductor layer) or pre-firing (which allows for patterning buried layers). The aim of this paper is to investigate surface properties of LTCC ceramics processed by laser etching. Precision optical imaging and SEM are used to determine etched surface properties, and EDS analysis is used to determine its chemical composition. Effectiveness of conductor removal is investigated by comparing surface resistivity and metal content in raw and etched samples.

APA, Harvard, Vancouver, ISO, and other styles

15

Oliveira, V., N. I. Polushkin, O. Conde, and R. Vilar. "Laser surface patterning using a Michelson interferometer and femtosecond laser radiation." Optics & Laser Technology 44, no. 7 (October 2012): 2072–75. http://dx.doi.org/10.1016/j.optlastec.2012.03.024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Ihlemann, J., J. Békési, J. H. Klein-Wiele, and P. Simon. "Processing of Dielectric Optical Coatings by Nanosecond and Femtosecond UV Laser Ablation." Laser Chemistry 2008 (October 16, 2008): 1–6. http://dx.doi.org/10.1155/2008/623872.

Full text

Abstract:

Microprocessing of dielectric optical coatings by UV laser ablation is demonstrated. Excimer laser ablation at deep UV wavelengths (248 nm, 193 nm) is used for the patterning of thin oxide films or layer stacks. The layer removal over extended areas as well as sub-μm-structuring is possible. The ablation of SiO2, Al2O3, HfO2, and Ta2O5 layers and layer systems has been investigated. Due to their optical, chemical, and thermal stability, these inorganic film materials are well suited for optical applications, even if UV-transparency is required. Transparent patterned films of SiO2 are produced by patterning a UV-absorbing precursor SiOx suboxide layer and oxidizing it afterwards to SiO2. In contrast to laser ablation of bulk material, in the case of thin films, the layer-layer or layer-substrate boundaries act as predetermined end points, so that precise depth control and a very smooth surface can be achieved. For large area ablation, nanosecond lasers are well suited; for patterning with submicron resolution, femtosecond excimer lasers are applied. Thus the fabrication of optical elements like dielectric masks, pixelated diffractive elements, and gratings can be accomplished.

APA, Harvard, Vancouver, ISO, and other styles

17

Kumar, G. Ranjith, G. Rajyalakshmi, and Vijaya Kumar Manupati. "Surface Micro Patterning of Aluminium Reinforced Composite through Laser Peening." International Journal of Manufacturing, Materials, and Mechanical Engineering 7, no. 4 (October 2017): 15–27. http://dx.doi.org/10.4018/ijmmme.2017100102.

Full text

Abstract:

Aluminium Composites have universal engineering applications because of their higher strength to weight ratio, ductility, and formability. However, in diverse applications, mechanical properties are the prerequisite at closer surface regions. Such localized changes without impacting various surface treatment approaches can attempt the bulk phase. Laser peening is an advanced surface engineering technique, which has been successfully applied to improve the surface morphology of the material. In this work, the authors focus on improving the surface properties of Al7075 composite through laser peening technique. The hardened layer was evaluated using surface integrity with optical microscopy, EDS, SEM and analysis of microhardness. Process parameters and resulting microstructures of Aluminium composite are summarized, along with the impact of laser peening on surface properties. Research results indicated that laser peening shows a significant influence on the final condition of the surface layer of Aluminium composite.

APA, Harvard, Vancouver, ISO, and other styles

18

Varshney, Usha, B. D. Eichelberger, J. M. Glass, R. J. Churchill, and A. I. Kingon. "Nd: YAG laser patterning of plasma-deposited high Tc superconducting thick films." Journal of Materials Research 8, no. 10 (October 1993): 2429–32. http://dx.doi.org/10.1557/jmr.1993.2429.

Full text

Abstract:

Advances in the development of high Tc superconducting thick film components and devices for microwave, millimeterwave, and submillimeterwave applications have led to the optimization of laser patterning techniques. Plasma-sprayed superconducting thick films of YBaCuO materials on polycrystalline alumina were laser etched using an Nd: YAG laser (λ = 1.06 μm) in the Q-switched mode. Spatial uniformity of the surface elemental distribution of Y, Ba, Cu, and Al was observed in the underlying laser-etched area. An etch rate of 7.5 μm/scan was calculated at an optimized laser fluencc of 1.8 × 104 J/cm2 for a translation rate of 2.54 cm/s, having patterning widths ranging from 5–15 μm with a heat-affected zone of 3 μm. An absorption length of 18.3 μm for the Nd: YAG laser was determined to be suitable for patterning thick films (20–80 μm) for device fabrication. The results are further compared to CO2 (λ = 10.6 μm) laser etching for patterning (250 μm) thick films.

APA, Harvard, Vancouver, ISO, and other styles

19

Maalouf, Mathieu, Alain Abou Khalil, Yoan Di Maio, Steve Papa, Xxx Sedao, Elisa Dalix, Sylvie Peyroche, Alain Guignandon, and Virginie Dumas. "Polarization of Femtosecond Laser for Titanium Alloy Nanopatterning Influences Osteoblastic Differentiation." Nanomaterials 12, no. 10 (May 10, 2022): 1619. http://dx.doi.org/10.3390/nano12101619.

Full text

Abstract:

Ultrashort pulse lasers have significant advantages over conventional continuous wave and long pulse lasers for the texturing of metallic surfaces, especially for nanoscale surface structure patterning. Furthermore, ultrafast laser beam polarization allows for the precise control of the spatial alignment of nanotextures imprinted on titanium-based implant surfaces. In this article, we report the biological effect of beam polarization on human mesenchymal stem cell differentiation. We created, on polished titanium-6aluminum-4vanadium (Ti-6Al-4V) plates, a laser-induced periodic surface structure (LIPSS) using linear or azimuthal polarization of infrared beams to generate linear or radial LIPSS, respectively. The main difference between the two surfaces was the microstructural anisotropy of the linear LIPSS and the isotropy of the radial LIPSS. At 7 d post seeding, cells on the radial LIPSS surface showed the highest extracellular fibronectin production. At 14 days, qRT-PCR showed on the same surface an increase in osteogenesis-related genes, such as alkaline phosphatase and osterix. At 21 d, mineralization clusters indicative of final osteoinduction were more abundant on the radial LIPSS. Taken together, we identified that creating more isotropic than linear surfaces enhances cell differentiation, resulting in an improved osseointegration. Thus, the fine tuning of ultrashort pulse lasers may be a promising new route for the functionalization of medical implants.

APA, Harvard, Vancouver, ISO, and other styles

20

Lübcke, Andrea, Zsuzsanna Pápa, and Matthias Schnürer. "Monitoring of Evolving Laser Induced Periodic Surface Structures." Applied Sciences 9, no. 17 (September 3, 2019): 3636. http://dx.doi.org/10.3390/app9173636.

Full text

Abstract:

Laser induced periodic surface structures (LIPSS) are generated on titanium and silicon nitride surfaces by multiple femtosecond laser pulses. An optical imaging system is used to observe the backscattered light during the patterning process. A characteristic fringe pattern in the backscattered light is observed and evidences the surface modification. Experiments are complemented by finite difference time domain numerical simulations which clearly show that the periodic surface modulation leads to characteristic modulations in the coherently scattered light field. It is proposed that these characteristic fringe pattern can be used as a very fast and low-cost monitor of LIPSS formation formation during the manufacturing process.

APA, Harvard, Vancouver, ISO, and other styles

21

Gutiérrez-Fernández, Edgar, Tiberio Ezquerra, Aurora Nogales, and Esther Rebollar. "Straightforward Patterning of Functional Polymers by Sequential Nanosecond Pulsed Laser Irradiation." Nanomaterials 11, no. 5 (April 27, 2021): 1123. http://dx.doi.org/10.3390/nano11051123.

Full text

Abstract:

Laser-based methods have demonstrated to be effective in the fabrication of surface micro- and nanostructures, which have a wide range of applications, such as cell culture, sensors or controlled wettability. One laser-based technique used for micro- and nanostructuring of surfaces is the formation of laser-induced periodic surface structures (LIPSS). LIPSS are formed upon repetitive irradiation at fluences well below the ablation threshold and in particular, linear structures are formed in the case of irradiation with linearly polarized laser beams. In this work, we report on the simple fabrication of a library of ordered nanostructures in a polymer surface by repeated irradiation using a nanosecond pulsed laser operating in the UV and visible region in order to obtain nanoscale-controlled functionality. By using a combination of pulses at different wavelengths and sequential irradiation with different polarization orientations, it is possible to obtain different geometries of nanostructures, in particular linear gratings, grids and arrays of nanodots. We use this experimental approach to nanostructure the semiconductor polymer poly(3-hexylthiophene) (P3HT) and the ferroelectric copolymer poly[(vinylidenefluoride-co-trifluoroethylene] (P(VDF-TrFE)) since nanogratings in semiconductor polymers, such as P3HT and nanodots, in ferroelectric systems are viewed as systems with potential applications in organic photovoltaics or non-volatile memories.

APA, Harvard, Vancouver, ISO, and other styles

22

Yang, Yang, Jianjun Yang, Lu Xue, and Yan Guo. "Surface patterning on periodicity of femtosecond laser-induced ripples." Applied Physics Letters 97, no. 14 (October 4, 2010): 141101. http://dx.doi.org/10.1063/1.3495785.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

MIYAJIMA, Toshiro, Kouichi NAKADERA, Takahide SAKATSUME, Isami NITTA, and Yoshiro IWAI. "911 Friction property of patterning surface by laser processing." Proceedings of Conference of Hokuriku-Shinetsu Branch 2009.46 (2009): 355–56. http://dx.doi.org/10.1299/jsmehs.2009.46.355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Milovanović, D. S., B. Gaković, C. Radu, M. Zamfirescu, B. Radak, S. Petrović, Z. Rogić Miladinović, and I. N. Mihailescu. "Femtosecond laser surface patterning of steel and titanium alloy." Physica Scripta T162 (September 1, 2014): 014017. http://dx.doi.org/10.1088/0031-8949/2014/t162/014017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Reif, Juergen, Florenta Costache, Olga Varlamova, Guobin Jia, and Markus Ratzke. "Self-organized regular surface patterning by pulsed laser ablation." physica status solidi (c) 6, no. 3 (March 2009): 681–86. http://dx.doi.org/10.1002/pssc.200880719.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Garcia-Giron, A., J. M. Romano, A. Batal, A. Michałek, P. Penchev, and S. S. Dimov. "Experimental investigation of processing disturbances in laser surface patterning." Optics and Lasers in Engineering 126 (March 2020): 105900. http://dx.doi.org/10.1016/j.optlaseng.2019.105900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Tomanik, Magdalena, Magdalena Kobielarz, Jarosław Filipiak, Maria Szymonowicz, Agnieszka Rusak, Katarzyna Mroczkowska, Arkadiusz Antończak, and Celina Pezowicz. "Laser Texturing as a Way of Influencing the Micromechanical and Biological Properties of the Poly(L-Lactide) Surface." Materials 13, no. 17 (August 27, 2020): 3786. http://dx.doi.org/10.3390/ma13173786.

Full text

Abstract:

Laser-based technologies are extensively used for polymer surface patterning and/or texturing. Different micro- and nanostructures can be obtained thanks to a wide range of laser types and beam parameters. Cell behavior on various types of materials is an extensively investigated phenomenon in biomedical applications. Polymer topography such as height, diameter, and spacing of the patterning will cause different cell responses, which can also vary depending on the utilized cell types. Structurization can highly improve the biological performance of the material without any need for chemical modification. The aim of the study was to evaluate the effect of CO2 laser irradiation of poly(L-lactide) (PLLA) thin films on the surface microhardness, roughness, wettability, and cytocompatibility. The conducted testing showed that CO2 laser texturing of PLLA provides the ability to adjust the structural and physical properties of the PLLA surface to the requirements of the cells despite significant changes in the mechanical properties of the laser-treated surface polymer.

APA, Harvard, Vancouver, ISO, and other styles

28

Garcia-Giron, A., J. M. Romano, Y. Liang, B. Dashtbozorg, H. Dong, P. Penchev, and S. S. Dimov. "Combined surface hardening and laser patterning approach for functionalising stainless steel surfaces." Applied Surface Science 439 (May 2018): 516–24. http://dx.doi.org/10.1016/j.apsusc.2018.01.012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Soldera, Marcos, Sabri Alamri, Paul Alexander Sürmann, Tim Kunze, and Andrés Fabián Lasagni. "Microfabrication and Surface Functionalization of Soda Lime Glass through Direct Laser Interference Patterning." Nanomaterials 11, no. 1 (January 8, 2021): 129. http://dx.doi.org/10.3390/nano11010129.

Full text

Abstract:

All-purpose glasses are common in many established and emerging industries, such as microelectronics, photovoltaics, optical components, and biomedical devices due to their outstanding combination of mechanical, optical, thermal, and chemical properties. Surface functionalization through nano/micropatterning can further enhance glasses’ surface properties, expanding their applicability into new fields. Although laser structuring methods have been successfully employed on many absorbing materials, the processability of transparent materials with visible laser radiation has not been intensively studied, especially for producing structures smaller than 10 µm. Here, interference-based optical setups are used to directly pattern soda lime substrates through non-lineal absorption with ps-pulsed laser radiation in the visible spectrum. Line- and dot-like patterns are fabricated with spatial periods between 2.3 and 9.0 µm and aspect ratios up to 0.29. Furthermore, laser-induced periodic surface structures (LIPSS) with a feature size of approximately 300 nm are visible within these microstructures. The textured surfaces show significantly modified properties. Namely, the treated surfaces have an increased hydrophilic behavior, even reaching a super-hydrophilic state for some cases. In addition, the micropatterns act as relief diffraction gratings, which split incident light into diffraction modes. The process parameters were optimized to produce high-quality textures with super-hydrophilic properties and diffraction efficiencies above 30%.

APA, Harvard, Vancouver, ISO, and other styles

30

Soldera, Marcos, Sabri Alamri, Paul Alexander Sürmann, Tim Kunze, and Andrés Fabián Lasagni. "Microfabrication and Surface Functionalization of Soda Lime Glass through Direct Laser Interference Patterning." Nanomaterials 11, no. 1 (January 8, 2021): 129. http://dx.doi.org/10.3390/nano11010129.

Full text

Abstract:

All-purpose glasses are common in many established and emerging industries, such as microelectronics, photovoltaics, optical components, and biomedical devices due to their outstanding combination of mechanical, optical, thermal, and chemical properties. Surface functionalization through nano/micropatterning can further enhance glasses’ surface properties, expanding their applicability into new fields. Although laser structuring methods have been successfully employed on many absorbing materials, the processability of transparent materials with visible laser radiation has not been intensively studied, especially for producing structures smaller than 10 µm. Here, interference-based optical setups are used to directly pattern soda lime substrates through non-lineal absorption with ps-pulsed laser radiation in the visible spectrum. Line- and dot-like patterns are fabricated with spatial periods between 2.3 and 9.0 µm and aspect ratios up to 0.29. Furthermore, laser-induced periodic surface structures (LIPSS) with a feature size of approximately 300 nm are visible within these microstructures. The textured surfaces show significantly modified properties. Namely, the treated surfaces have an increased hydrophilic behavior, even reaching a super-hydrophilic state for some cases. In addition, the micropatterns act as relief diffraction gratings, which split incident light into diffraction modes. The process parameters were optimized to produce high-quality textures with super-hydrophilic properties and diffraction efficiencies above 30%.

APA, Harvard, Vancouver, ISO, and other styles

31

Fabris, Douglas, Andrés Fabián Lasagni, Márcio C. Fredel, and Bruno Henriques. "Direct Laser Interference Patterning of Bioceramics: A Short Review." Ceramics 2, no. 4 (October 28, 2019): 578–86. http://dx.doi.org/10.3390/ceramics2040045.

Full text

Abstract:

Bioceramics are a great alternative to use in implants due to their excellent biocompatibility and good mechanical properties. Depending on their composition, bioceramics can be classified into bioinert and bioactive, which relate to their interaction with the surrounding living tissue. Surface morphology also has great influence on the implant biological behavior. Controlled texturing can improve osseointegration and reduce biofilm formation. Among the techniques to produce nano- and micropatterns, laser texturing has shown promising results due to its excellent accuracy and reproducibility. In this work, the use of laser techniques to improve surface morphology of biomaterials is reviewed, focusing on the application of direct laser interference patterning (DLIP) technique in bioceramics.

APA, Harvard, Vancouver, ISO, and other styles

32

Shin, Hong-Shik. "Deep Electrochemical Etching of Stainless Steel Using a Deposited Copper Layer." Applied Sciences 12, no. 23 (December 6, 2022): 12473. http://dx.doi.org/10.3390/app122312473.

Full text

Abstract:

Deep electrochemical etching (DEE) is proposed in this paper. DEE is a process that repeats steps consisting of electrodeposition, laser patterning, and electrochemical etching. In the electrodeposition step, a deposited layer is formed on the surface of the workpiece. This deposited layer serves as a protective layer to protect the surface of the workpiece until it is completely dissolved in the electrochemical etching step. Laser patterning is the step of patterning a deposited layer by irradiating a laser beam while minimizing surface damage to the workpiece. The etching of the workpiece proceeds through the electrochemical etching step. If these three steps are performed sequentially, one cycle of the DEE process is completed. By repeating this cycle, an improved etch factor can be obtained in the DEE process. The processing characteristics according to DEE process conditions were analyzed through an SEM and 3D surface profiler. Through the DEE process, a microstructure with a deep etching depth was fabricated, and the micropatterns successfully penetrated a one-hundred-um-thick stainless steel specimen. Through the DEE process, it was confirmed that it is possible to fabricate a micro with a high aspect ratio structure pattern by improving the etch factor.

APA, Harvard, Vancouver, ISO, and other styles

33

Mao, Bo, Arpith Siddaiah, Pradeep L. Menezes, and Yiliang Liao. "Surface texturing by indirect laser shock surface patterning for manipulated friction coefficient." Journal of Materials Processing Technology 257 (July 2018): 227–33. http://dx.doi.org/10.1016/j.jmatprotec.2018.02.041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Higo, S., Y. Hakuraku, Y. Shimada, E. Minamizono, M. Tadokoro, and T. Ogushi. "Micropatterning of BiSrCaCuO Thin Films Using Excimer Laser." International Journal of Modern Physics B 12, no. 32 (December 30, 1998): 3485–94. http://dx.doi.org/10.1142/s0217979298002830.

Full text

Abstract:

Micropatterning of BiSrCaCuO(BSCCO) superconducting thin films has been successfully accomplished by using a pulsed KrF excimer laser with a wavelength of λ=248 nm and a duration of 25 ns. The optimum energy density of the laser was 0.36 Jcm -2 for etching of these films. For example, a superconducting microstructure of BSCCO film with nominally 3 μm wide and 2 μm long, showed no degradation in T c and J c . Excimer laser patterning technique yields reproducible patterning without any degradation of superconducting properties. The etching bordering and surface morphology was examined using an atomic force microscope.

APA, Harvard, Vancouver, ISO, and other styles

35

Pezzotti, Marin, Zanocco, Boschetto, Zhu, McEntire, Bal, Adachi, Yamamoto, and Mazda. "Osteogenic Enhancement of Zirconia-Toughened Alumina with Silicon Nitride and Bioglass®." Ceramics 2, no. 4 (October 4, 2019): 554–67. http://dx.doi.org/10.3390/ceramics2040043.

Full text

Abstract:

Alumina (Al2O3) ceramic implants do not stimulate osteoblasts in vivo. Surface alterations targeted at changing the chemistry or topography have been proposed to enhance the bioactivity of alumina. This surface modification is intended to improve oxide bioceramic’s ability to integrate with the biological environment and, in particular, to rapidly osteointegrate. In this study, the surface of zirconia-toughened alumina (ZTA) was functionalized using two methods: (i) Surface laser-patterning and successive filling of patterned wells with powder mixtures of bioglass and Si3N4; and, (ii) Si3N4 coating by pulse-laser sintering. Functionalized ZTA surfaces were characterized with vibrational spectroscopy, biological testing, and laser microscopy. Both enhancements resulted in osteoblast activation, a property that is relevant to osteosynthesis.

APA, Harvard, Vancouver, ISO, and other styles

36

Wu, Rongbo, Min Wang, Jian Xu, Jia Qi, Wei Chu, Zhiwei Fang, Jianhao Zhang, et al. "Long Low-Loss-Litium Niobate on Insulator Waveguides with Sub-Nanometer Surface Roughness." Nanomaterials 8, no. 11 (November 6, 2018): 910. http://dx.doi.org/10.3390/nano8110910.

Full text

Abstract:

In this paper, we develop a technique for realizing multi-centimeter-long lithium niobate on insulator (LNOI) waveguides with a propagation loss as low as 0.027 dB/cm. Our technique relies on patterning a chromium thin film coated on the top surface of LNOI into a hard mask with a femtosecond laser followed by chemo-mechanical polishing for structuring the LNOI into the waveguides. The surface roughness on the waveguides was determined with an atomic force microscope to be 0.452 nm. The approach is compatible with other surface patterning technologies, such as optical and electron beam lithographies or laser direct writing, enabling high-throughput manufacturing of large-scale LNOI-based photonic integrated circuits.

APA, Harvard, Vancouver, ISO, and other styles

37

Kovačević, Aleksander G., Suzana Petrović, Alexandros Mimidis, Emmanuel Stratakis, Dejan Pantelić, and Branko Kolaric. "Molding Wetting by Laser-Induced Nanostructures." Applied Sciences 10, no. 17 (August 30, 2020): 6008. http://dx.doi.org/10.3390/app10176008.

Full text

Abstract:

The influence of material characteristics—i.e., type or surface texture—to wetting properties is nowadays increased by the implementation of ultrafast lasers for nanostructuring. In this account, we exposed multilayer thin metal film samples of different materials to a femtosecond laser beam at a 1030 nm wavelength. The interaction generated high-quality laser-induced periodic surface structures (LIPSS) of spatial periods between 740 and 790 nm and with maximal average corrugation height below 100 nm. The contact angle (CA) values of the water droplets on the surface were estimated and the values between unmodified and modified samples were compared. Even though the laser interaction changed both the surface morphology and the chemical composition, the wetting properties were predominantly influenced by the small change in morphology causing the increase in the contact angle of ~80%, which could not be explained classically. The influence of both surface corrugation and chemical composition to the wetting properties has been thoroughly investigated, discussed and explained. The presented results clearly confirm that femtosecond patterning can be used to mold wetting properties.

APA, Harvard, Vancouver, ISO, and other styles

38

Jipa, Florin, Stefana Orobeti, Cristian Butnaru, Marian Zamfirescu, Emanuel Axente, Felix Sima, and Koji Sugioka. "Picosecond Laser Processing of Photosensitive Glass for Generation of Biologically Relevant Microenvironments." Applied Sciences 10, no. 24 (December 15, 2020): 8947. http://dx.doi.org/10.3390/app10248947.

Full text

Abstract:

Various material processing techniques have been proposed for fabrication of smart surfaces that can modulate cellular behavior and address specific clinical issues. Among them, laser-based technologies have attracted growing interest due to processing versatility. Latest development of ultrashort pulse lasers with pulse widths from several tens of femtoseconds (fs) to several picoseconds (ps) allows clean microfabrication of a variety of materials at micro- and nanoscale both at surface and in volume. In this study, we addressed the possibility of 3D microfabrication of photosensitive glass (PG) by high repetition rate ps laser-assisted etching (PLAE) to improve the fabrication efficiency for the development of useful tools to be used for specific biological applications. Microfluidic structures fabricated by PLAE should provide the flow aspects, 3D characteristics, and possibility of producing functional structures to achieve the biologically relevant microenvironments. Specifically, the microfluidic structures could induce cellular chemotaxis over extended periods in diffusion-based gradient media. More importantly, the 3D characteristics could reproduce capillaries for in vitro testing of relevant organ models. Single cell trapping and analysis by using the fabricated microfluidic structures are also essential for understanding individual cell behavior within the same population. To this end, this paper demonstrates: (1) generation of 3D structures in glass volume or on surface for fabrication of microfluidic channels, (2) subtractive 3D surface patterning to create patterned molds in a controlled manor for casting polydimethylsiloxane (PDMS) structures and developing single cell microchambers, and (3) designing glass photo-masks to be used for sequel additive patterning of biocompatible nanomaterials with controlled shapes, sizes, and periodicity. Mesenchymal stem cells grown on laser-processed glass surfaces revealed no sign of cytotoxicity, while a collagen thin coating improved cellular adhesion.

APA, Harvard, Vancouver, ISO, and other styles

39

Volpe, Annalisa, Caterina Gaudiuso, and Antonio Ancona. "Laser Fabrication of Anti-Icing Surfaces: A Review." Materials 13, no. 24 (December 13, 2020): 5692. http://dx.doi.org/10.3390/ma13245692.

Full text

Abstract:

In numerous fields such as aerospace, the environment, and energy supply, ice generation and accretion represent a severe issue. For this reason, numerous methods have been developed for ice formation to be delayed and/or to inhibit ice adhesion to the substrates. Among them, laser micro/nanostructuring of surfaces aiming to obtain superhydrophobic behavior has been taken as a starting point for engineering substrates with anti-icing properties. In this review article, the key concept of surface wettability and its relationship with anti-icing is discussed. Furthermore, a comprehensive overview of the laser strategies to obtain superhydrophobic surfaces with anti-icing behavior is provided, from direct laser writing (DLW) to laser-induced periodic surface structuring (LIPSS), and direct laser interference patterning (DLIP). Micro-/nano-texturing of several materials is reviewed, from aluminum alloys to polymeric substrates.

APA, Harvard, Vancouver, ISO, and other styles

40

Bäuerle, D., Enno Arenholz, J. Heitz, S. Proyer, E. Stangl, and B. Luk'yanchuk. "Surface Patterning and Thin-Film Formation by Pulsed-Laser Ablation." Materials Science Forum 173-174 (September 1994): 41–52. http://dx.doi.org/10.4028/www.scientific.net/msf.173-174.41.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Nakayama, Yasuhide, and Takehisa Matsuda. "Excimer laser‐induced surface fixation of polymer and its patterning." Journal of Applied Physics 80, no. 1 (July 1996): 505–8. http://dx.doi.org/10.1063/1.363553.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Menold, T., M. Ametowobla, J. R. Köhler, and J. H. Werner. "Surface patterning of monocrystalline silicon induced by spot laser melting." Journal of Applied Physics 124, no. 16 (October 28, 2018): 163104. http://dx.doi.org/10.1063/1.5049781.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Kromer, R., S. Costil, J. Cormier, D. Courapied, L. Berthe, P. Peyre, and M. Boustie. "Laser surface patterning to enhance adhesion of plasma sprayed coatings." Surface and Coatings Technology 278 (September 2015): 171–82. http://dx.doi.org/10.1016/j.surfcoat.2015.07.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Fang, Shiqi, Víctor Pérez, Nuria Salán, Dirk Baehre, and Luis Llanes. "Surface Patterning of Cemented Carbides by Means of Nanosecond Laser." Materials and Manufacturing Processes 35, no. 2 (June 17, 2019): 123–29. http://dx.doi.org/10.1080/10426914.2019.1628268.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Smedley, John, Jen Bohon, Qiong Wu, and Triveni Rao. "Laser patterning of diamond. Part I. Characterization of surface morphology." Journal of Applied Physics 105, no. 12 (June 15, 2009): 123107. http://dx.doi.org/10.1063/1.3152956.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Hugonnot, Emmanuel, and Jean-Pierre Delville. "Kinetic control of periodic surface patterning by laser photochemical deposition." Applied Surface Science 248, no. 1-4 (July 2005): 185–89. http://dx.doi.org/10.1016/j.apsusc.2005.03.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Lim, C. S., M. H. Hong, Y. Lin, G. X. Chen, A. Senthil Kumar, M. Rahman, L. S. Tan, J. Y. H. Fuh, and G. C. Lim. "Sub-micron surface patterning by laser irradiation through microlens arrays." Journal of Materials Processing Technology 192-193 (October 2007): 328–33. http://dx.doi.org/10.1016/j.jmatprotec.2007.04.088.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Lee, Keunhee, and Hyungson Ki. "Femtosecond laser patterning based on the control of surface reflectance." Applied Surface Science 494 (November 2019): 187–95. http://dx.doi.org/10.1016/j.apsusc.2019.07.163.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Mücklich, F., A. Lasagni, and C. Daniel. "Laser interference metallurgy—periodic surface patterning and formation of intermetallics." Intermetallics 13, no. 3-4 (March 2005): 437–42. http://dx.doi.org/10.1016/j.intermet.2004.07.005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Jähnig, Theresa, Cornelius Demuth, and Andrés Fabián Lasagni. "Influence of Sulphur Content on Structuring Dynamics during Nanosecond Pulsed Direct Laser Interference Patterning." Nanomaterials 11, no. 4 (March 27, 2021): 855. http://dx.doi.org/10.3390/nano11040855.

Full text

Abstract:

The formation of melt and its spread in materials is the focus of many high temperature processes, for example, in laser welding and cutting. Surface active elements alter the surface tension gradient and therefore influence melt penetration depth and pool width. This study describes the application of direct laser interference patterning (DLIP) for structuring steel surfaces with diverse contents of the surface active element sulphur, which affects the melt convection pattern and the pool shape during the process. The laser fluence used is varied to analyse the different topographic features that can be produced depending on the absorbed laser intensity and the sulphur concentration. The results show that single peak geometries can be produced on substrates with sulphur contents lower than 300 ppm, while structures with split peaks form on higher sulphur content steels. The peak formation is explained using related conceptions of thermocapillary convection in weld pools. Numerical simulations based on a smoothed particle hydrodynamics (SPH) model are employed to further investigate the influence of the sulphur content in steel on the melt pool convection during nanosecond single-pulsed DLIP.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!