Hierarchical Micro-/Nano-Structures on Polycarbonate via UV Pulsed Laser Processing

Mezera, Marek; Alamri, Sabri; Hendriks, Ward A. P. M.; Hertwig, Andreas; Elert, Anna Maria; Kunze, Tim; Lasagni, Andrés Fabían; Römer, G.R.B.E.

doi:10.3390/nano10061184

Cited by 19 publications

(19 citation statements)

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“…Recently, some groups started to investigate the hybrid processing of hierarchical surface structures of micrometric DLIP structures superimposed with nanometric LIPSS [ 48 , 55 , 56 ], which can combine the benefits of both approaches on the costs of an additional processing step.…”

Section: Recent (Ongoing) Trendsmentioning

confidence: 99%

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Quo Vadis LIPSS?—Recent and Future Trends on Laser-Induced Periodic Surface Structures

Bonse

2020

Nanomaterials

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135

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Nanotechnology and lasers are among the most successful and active fields of research and technology that have boomed during the past two decades. Many improvements are based on the controlled manufacturing of nanostructures that enable tailored material functionalization for a wide range of industrial applications, electronics, medicine, etc., and have already found entry into our daily life. One appealing approach for manufacturing such nanostructures in a flexible, robust, rapid, and contactless one-step process is based on the generation of laser-induced periodic surface structures (LIPSS). This Perspectives article analyzes the footprint of the research area of LIPSS on the basis of a detailed literature search, provides a brief overview on its current trends, describes the European funding strategies within the Horizon 2020 programme, and outlines promising future directions.

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Section: Recent (Ongoing) Trendsmentioning

confidence: 99%

“…The direction of scanning is vertical here. Reprinted from Mezera et al [ 48 ], Hierarchical Micro-/Nano-Structures on Polycarbonate via UV Pulsed Laser Processing, Nanomaterials , 2020 , 10, 1184. Copyright 2020 under Creative Commons BY 4.0 license.…”

Section: Figurementioning

confidence: 99%

Quo Vadis LIPSS?—Recent and Future Trends on Laser-Induced Periodic Surface Structures

Bonse

2020

Nanomaterials

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135

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“…The spine and barbs have micro/nano roughness. [44][45][46][47][48][49][50][51][52] Wettability can be evaluated by measuring the contact angle (CA) and sliding angle (SA) of a small liquid droplet on the target substrate. CA refers to the angle (θ) between the tangent of the air/liquid surface and the liquid/solid interface at the three-phase contact line when a droplet drops on a surface.…”

Section: Nature Creatures With Gradient Surfacesmentioning

confidence: 99%

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Yin

Xiao

et al. 2021

Adv Materials Inter

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materials with gradients inspired by biological surfaces has therefore attracted much interest. Strategies for preparing gradient surfaces include vapor-phase diffusion, gradual immersion, electrochemical oxidation, and photolithography that have broadly adopted. [20-26] However, their material constraints, tedious and time-consuming processes, and their single-pattern limit their widespread use. Developing a substrate-independent, facile and efficient, pattern-diverse method for preparing gradient surfaces would aid fundamental science and practical application. Among various techniques, laser processing has recently emerged as a powerful tool in integratedoptics and biomimetic micro-nanodevices. This technology can be used to precisely control the preparation of micro/nanoscale structures on various substrates such as metals, glass, ceramics, and polymers. [27-33] Besides, the high energy density of lasers allows the machining process to be completed quickly and efficiently. Combining laser machining with computer-aided control allows laser ablation parameters to be precisely controlled, including the processing position, scanning speed, scanning interval, and scanning track. Laser processing can therefore be used to produce flexible and diverse patterns in complex workpieces. And laser micro/nano fabrication has been applied to regulate surface wettability. [34-43] Therefore, laser processing has great potential for developing samples with different wettability and geometries on various materials. This review discusses laser fabrication of bioinspired gradient surfaces for wettability applications, whose overview is shown in Figure 1. The related backgrounds including gradient surfaces in natural creatures, the theoretical basis of wettability, and the distinct characteristics of laser processing are introduced. Gradient surfaces can be classified into wettability gradients and geometric gradients, and they are discussed in terms of various laser fabrication approaches and wettability applications. It is worth mentioning the definition of wettability gradient and geometric gradient in this review. Wettability gradient is defined as a surface with no obvious geometric change in the shape, and there is a difference of contact angles on the macro level resulting from the roughness gradient on the micro level. Geometric gradient is defined as a surface possessing significant geometric changes in the shape, but not much difference in the roughness of the entire surface at the microscopic level. Specially, a wettability gradient surface generates a water driving force as a result of its varying surface roughness. Wettability gradient surfaces can be applied in water droplet control, Inspired by nature, gradient surfaces have attracted broad research interest because of their potential in microfluidics, fog/water collection, and water electrolysis. Among the various techniques for preparing gradient surfaces, laser processing is substrate-independent, facile and efficient, patterndiverse, which can be used to prepare...

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“…However, the diffraction limit restricts the direct laser writing technique. On the other hand, researchers have developed cutting-edge ways to overcome the limit, for instance, direct interference patterning by registration of an interference pattern from two or more laser beams [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Other most recent experiments tackle this problem by the laser-induced formation of oxide layers on metals of titanium (Ti) [ 17 ] and vanadium groups (V, Zr, Ta, et al) [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Laser Thermochemical High-Contrast Recording on Thin Metal Films

et al. 2020

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Laser-induced thermochemical recording of nano- and microsized structures on thin films has attracted intense interest over the last few decades due to essential applications in the photonics industry. Nevertheless, the relationship between the laser parameters and the properties of the formed oxide structures, both geometrical and optical, is still implicit. In this work, direct laser interference patterning of the titanium (Ti) film in the oxidative regime was applied to form submicron periodical structures. Depending on the number of laser pulses, the regime of high contrast structures recording was observed with the maximum achievable thickness of the oxide layer. The investigation revealed high transmittance of the formed oxide layers, i.e., the contrast of recorded structures reached up to 90% in the visible range. To analyze the experimental results obtained, a theoretical model was developed based on calculations of the oxide formation dynamics. The model operates on Wagner oxidation law and the corresponding optical properties of the oxide–metal–glass substrate system changing nonlinearly after each pulse. A good agreement of the experimental results with the modeling estimations allowed us to extend the model application to other metals, specifically to those with optically transparent oxides, such as zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), and tantalum (Ta). The performed analysis highlighted the importance of choosing the correct laser parameters due to the complexity and nonlinearity of optical, thermal, and chemical processes in the metal film during its laser-induced oxidation in the air. The developed model allowed selecting the suitable temporal–energetic regimes and predicting the optical characteristics of the structures formed with an accuracy of 10%. The results are promising in terms of their implementation in the photonics industry for the production of optical converters.

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Hierarchical Micro-/Nano-Structures on Polycarbonate via UV Pulsed Laser Processing

Cited by 19 publications

References 58 publications

Quo Vadis LIPSS?—Recent and Future Trends on Laser-Induced Periodic Surface Structures

Quo Vadis LIPSS?—Recent and Future Trends on Laser-Induced Periodic Surface Structures

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Laser Thermochemical High-Contrast Recording on Thin Metal Films

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