On the formation of laser induced self-organizing nanostructures

Römer, G.R.B.E.; Veld, M.H.A. Huis in 't; Meijer, J.; Groenendijk, M.N.W.

doi:10.1016/j.cirp.2009.03.068

Cited by 61 publications

(39 citation statements)

References 10 publications

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“…Interestingly, Romer et al (2009) observed that LIPSS appear first on grain boundaries for SS316 [102]. The debate of origin and formation of FLIPSS is still ongoing and future investigations are needed to clarify this subject.…”

Section: Periodic Nanostructuresmentioning

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: Periodic Nanostructuresmentioning

confidence: 99%

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

2014

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“…It is clean to the environment and provides excellent control of the shape and size of the micro-dimples, which allows realization of optimum designs. By controlling energy density, the laser can safely process hardened steels, ceramics, and polymers as well as crystalline structures [70,71,72,73]. Romer et al…”

Section: Anodizing and Some Other Techniquesmentioning

confidence: 99%

Protection of metal and alloy surfaces using corrosion resistance nanostructured superhydrophobic coatings /

Huang¹

2012

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Dans notre travail actuel, le processus de fabrication de surfaces de cuivre superhydrophobe est simplifié en une simple étape. L'application d'une tension continue entre deux plaques de cuivre immergé dans une solution diluée d'acide stéarique éthanolique transforme la surface de l'électrode de cuivre anodique en superhydrophobe due à la formation de micronano fibres de stéarate de cuivre à faible énergie de surface, tel que confirmé par rayons X diffraction (XRD) et microscopie électronique à balayage (MEB). L'augmentation du potentiel de modification, ainsi que la temps de modification conduit à l'augmentation de la valeur de la faible énergie de surface des micronanostructures ainsi que l'augmentation de la superhydrophobicité des surfaces telle que mesurée par l'angle de contact de l'eau. ABSTRACTSuperhydrophobic surfaces, which demonstrate high water-repellency, have recently become a very popular field because of its scientific and technological importance and wide range of applications in diverse areas. Preparation of nanostructured superhydrophobic surfaces requires both an optimum roughness and low surface energy; therefore, superhydrophobic surfaces are conventionally prepared employing two steps: roughening a surface and lowering its surface energy.In our present work, the fabrication process of superhydrophobic copper surfaces is simplified as just one-step. The application of a direct voltage between two copper plates immersed in a dilute ethanolic stearic acid solution transforms the surface of the anodic copper electrode to superhydrophobic due to the formation of micro-nanofibors low surface energy follower-like copper stéarate as confirmed by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The increase of the modification potential as well as the modification time leads to the increase of the amount of the low surface energy micro-nanostructures as well as the increase of the superhydrophobicity of the surfaces as measured by water contact angle.The nanostructured superhydrophobic aluminum alloy surfaces have also been prepared by the similar procedure as it was performed on copper surfaces. However, stearic acid modified aluminum alloy surfaces didn't show the superhydrophobic properties. Therefore, the aluminum surfaces were firstly coated with copper films followed by electrochemical modification with stearic acid solution. The copper grows as microdots on AA6061 Al alloy surfaces. The surface densities of the microdots increase with the increase of the negative deposition potentials. On the other hand their sizes as well as the distances between the microdots reduce with the increase of the negative deposition potentials. The surface roughness and water contact angle of electrodeposited copper film followed by electrochemical modification in ethanolic stearic acid solution increase with the increase in negative copper deposition potentials. The stearic acid modified copper films deposited at -0.6 V provides a surface roughness of 6.2 /un with a water contact a...

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“…b͒ originating from surface instabilities caused by two competing processes, namely, surface roughening due to explosion and surface smoothing due to self-diffusion. 13,27 Moreover, Romer et al 29 were unable to account for their results of subwavelength "pre-ripple" formation, which is initiated with irregular lines and with an orientation different from that of the "regular ripples" of conventional-LIPSS induced by a number of fs-laser pulses irradiated on the surfaces of alloys, using the four previous major models in the literature. They suggested a combination of the existing models including the above-mentioned models.…”

Section: Introductionmentioning

confidence: 99%

“…They suggested a combination of the existing models including the above-mentioned models. 29 To comprehensively understand the detailed mechanisms and establish an appropriate model for such subwavelength LIPSS formation including the present LIPPS-dots, a dynamic, microscopic in situ observation under pulsed-laser irradiation on a pulse-by-pulse basis has become important.…”

Section: Introductionmentioning

confidence: 99%

“…13,[23][24][25][26][27][28][29] It has been well known that when a linearly polarized laser beam impinges on a material at normal incidence, the fringe pattern of conventional-LIPSS appears in the form of parallel, periodic ripple lines with an incident light wavelength separation, irrespective of the surface crystallographic orientation, and most of the damage patterns are very similar and independent of material properties, regardless of whether the material is a metal or a semiconductor. 19 It is now generally accepted that conventional-LIPSS is formed by the interference between the incident laser light and the scattered waves on the surface, 21,22 which may include recent laser induced waves, such as electron plasma, 25 Coulomb explosion 30 or surface plasmons, 31 as an extension of the interference model for subwavelength ͑or high-spatialfrequency͒ LIPSS bifurcations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In situ observation of self-organizing nanodot formation under nanosecond-pulsed laser irradiation on Si surface

Watanabe

Yoshida

Kayashima

et al. 2010

Journal of Applied Physics

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An in situ observation of the formation of a laser-irradiation-induced nanodot array on a Si surface was performed using a pulsed-laser-equipped high-voltage electron microscope ͑laser-HVEM͒. Under multiple nanosecond ͑ns͒ pulsed laser irradiation shots, atomic clusters were first formed and distributed on the surface in order to grow them epitaxially into protruded dots with diameters of ten nanometers or less. This is followed by their diffusion induced by successive laser shots to cannibalize and merge them into a ripple line with aligned, larger dots. We conclude that the present subwavelength two-dimensionally-ordered nanodot array is formed by self-organization under pulsed laser irradiation.

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On the formation of laser induced self-organizing nanostructures

Cited by 61 publications

References 10 publications

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

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

Protection of metal and alloy surfaces using corrosion resistance nanostructured superhydrophobic coatings /

In situ observation of self-organizing nanodot formation under nanosecond-pulsed laser irradiation on Si surface

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