Colorizing stainless steel surface by femtosecond laser induced micro/nano-structures

Ahsan, Md. Shamim; Ahmed, Farid; Kim, Yeong Gyu; Lee, Man Seop; Jun, Martin B. G.

doi:10.1016/j.apsusc.2011.04.027

Cited by 108 publications

(33 citation statements)

References 25 publications

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“…The presence of nano-and microstructures generally leads to an altered light absorption behaviour, which often results in surfaces that appear dark gray or black and are highly absorptive [70,125]. By finely tuning the surface structures, it is possible to create structurally coloured metal surfaces, the absorption properties of which can be controlled over the ultraviolet to terahertz range [1,144]. Furthermore, the optical properties can be tuned to create metals exhibiting different colors at different viewing angles [145,146].…”

Section: Applicationsmentioning

confidence: 99%

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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Abstract:Femtosecond laser micromachining has emerged in recent years as a new technique for micro/nano structure fabrication because of its applicability to virtually all kinds of materials in an easy one-step process that is scalable. In the past, much research on femtosecond laser micromachining was carried out to understand the complex ablation mechanism, whereas recent works are mostly concerned with the fabrication of surface structures because of their numerous possible applications. The state-of-the-art knowledge on the fabrication of these structures on metals with direct femtosecond laser micromachining is reviewed in this article. The effect of various parameters, such as fluence, number of pulses, laser beam polarization, wavelength, incident angle, scan velocity, number of scans, and environment, on the formation of different structures is discussed in detail wherever possible. Furthermore, a guideline for surface structures optimization is provided. The authors' experimental work on laser-inscribed regular pattern fabrication is presented to give a complete picture of micromachining processes. Finally, possible applications of laser-machined surface structures in different fields are briefly reviewed.

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Section: Applicationsmentioning

confidence: 99%

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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“…Since the structures are smaller than the wavelength of light, the way they reflect light is highly dependent upon their specific size and shape, which can be varied by changing the processing parameters. The femtosecond nanomachining also allowed the creation of the so-called colored metal by combining the low reflectance and light diffraction [8,14,15]. This was realized by combining the micro-and nanoscale features on the processed surface, i.e.…”

Section: Introductionmentioning

confidence: 99%

Production of nanostructures on bulk metal samples by laser ablation for fabrication of low-reflective surfaces

et al. 2013

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Nanostructure formation on bulk noble metals (copper, gold and silver) by a femtosecond laser was studied aiming at the production of low-reflectivity surfaces. The target surface was irradiated with the beam of a 775 nm wavelength and 150 fs pulse duration Ti:sapphire laser. The fluence was in the 16-2000 mJ/cm 2 range, while the average pulse number was varied between 10 and 1000 depending on the scanning speed of the sample stage. The reflectivity of the treated surfaces was measured with a visible-nearinfrared microspectrometer in the 450-800 nm range, while the morphology was studied with a scanning electron microscope. A strong correlation was found between the decreasing reflectivity and the nanostructure formation on the irradiated surface; however, the morphology of silver significantly differed from those of copper and gold. For the two latter metals a dense coral-like structure was found probably as a result of cluster condensation in the ablation plume followed by diffusion-limited aggregation. In the case of silver the surface was covered by nanodroplets, which formation was probably influenced by the 'spitting' caused by ambient oxygen absorption in the molten silver followed by its fast release during the resolidification.

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“…Recently, laser-induced periodic surface structures (LIPSS) have gained remarkable interest because they enable tuning of a wide range of properties, including wettability [14], colorization [15], and tribological properties [16][17][18]. LIPSS or so-called ripples have been observed on numerous solid material surfaces.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Friction of Metals Using Laser-Induced Periodic Surface Nanostructures

2015

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Abstract:We report on the effect of femtosecond-laser-induced periodic surface structures (LIPSS) on the tribological properties of stainless steel. Uniform periodic nanostructures were produced on AISI 304L (American Iron and Steel Institute steel grade) steel surfaces using an 800-nm femtosecond laser. The spatial periods of LIPSS measured by field emission scanning electron microscopy ranged from 530 to 570 nm. The tribological properties of smooth and textured surfaces with periodic nanostructures were investigated using reciprocating ball-on-flat tests against AISI 440C balls under both dry and starved oil lubricated conditions. The friction coefficient of LIPSS covered surfaces has shown a lower value than that of the smooth surface. The induced periodic nanostructures demonstrated marked potential for reducing the friction coefficient compared with the smooth surface.

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Colorizing stainless steel surface by femtosecond laser induced micro/nano-structures

Cited by 108 publications

References 25 publications

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Production of nanostructures on bulk metal samples by laser ablation for fabrication of low-reflective surfaces

Reduction of Friction of Metals Using Laser-Induced Periodic Surface Nanostructures

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