Functionalization of surfaces by ultrafast laser micro/nano structuring

Hairaye, Camille; Mermet, Frédéric; Engel, Thierry; Montgomery, P.C.; Fontaine, Joël

doi:10.1088/1742-6596/558/1/012063

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…The ripples studied are laser‐induced periodic surface structures, generated by the self‐organization of the metallic material (AISI 316L stainless steel) after irradiation with femtosecond laser pulses. These quasi‐periodical structures present a spatial period of the order of the laser wavelength and a preferential orientation perpendicular to the direction of the incident linear polarization …”

Section: Resultsmentioning

confidence: 99%

High Resolution Microsphere‐Assisted Interference Microscopy for 3D Characterization of Nanomaterials

Leong-Hoï

Hairaye

Perrin

et al. 2017

Physica Status Solidi (a)

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Nanoscale materials are nowadays widely used in many different modern technologies. Special attention is thus required for their characterization in order to optimize fabrication processes. However, current characterization systems which can achieve nanometric resolution over a large area and in three dimensions are few. Classical optical microscopy presents a resolving power limited by diffraction, making impossible the visualization of elements with a size under half the wavelength. Recently, several methods have thus been developed to overcome this limitation, among them microsphere-assisted microscopy. Indeed, using a transparent microsphere, a full-field image of the sample can be retrieved with a higher resolution than the diffraction-limit. In this paper, this new imaging technique is combined with phase-shifting interferometry in order to reconstruct the 3D surface of nanostructures. An enhancement of a factor of 4.0 in the lateral resolution is demonstrated while combining this with the nanometric axial sensitivity of interferometry. Results are shown of the topography of reference gratings as well as periodic Ag nano-dots on silicon and laser induced ripples in steel, spaced by a few hundred nanometres. A comparison of these results is made with those from SEM and atomic force microscopy. status solidi physica a Interference Microscopy www.pss-a.com

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Section: Resultsmentioning

confidence: 99%

High Resolution Microsphere‐Assisted Interference Microscopy for 3D Characterization of Nanomaterials

Leong-Hoï

Hairaye

Perrin

et al. 2017

Physica Status Solidi (a)

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“…An interest in microstructured surfaces with peaks has arisen thanks to the superhydrophobic effect [24,25]. As an application example, a 5 x 5 mm matrix with micro-peaks every 50 µm, called fakir's bed of nails surface, has been achieved on silicon.…”

Section: Resultsmentioning

confidence: 99%

Photonic jet: direct micro-peak machining

et al. 2017

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We report on the first evidence of direct micro-peak machining using a photonic jet (PJ) with nanosecond laser pulses. PJ is a high concentrated propagative light beam with a full width at half maximum (FWHM) smaller than the diffraction limit. In our case, PJs are generated with a shaped optical fiber tip. Micro-peaks with a FWHM of around 1 µm, a height until 590 nm and an apex radius of 14 nm, were repeatability achieved on a silicon wafer. The experiments have been carried out in ambient air using a 100/140 multimode silica fiber with a shaped tip along with a 35 kHz pulsed laser emitting 100 ns pulses at 1064 nm. This study shows that the phenomenon occurs only at low energies, just under the ablation threshold. Bulk material appears to have moved around to achieve the peaks in a self-organized process. We hypothesize that the matter was melted and not vaporized; hydrodynamic flow of molten material governed by surface-tension forces may be the causes. This surface modification has many applications. For example, this paper reports on the decrease of wettability of a textured silicon wafer.

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“…The increasing availability of advanced fiber and DPSS lasers with characteristic pulse lengths ranging from ns to fs provides a unique frame in which the development of laser generated micro/nano-structures has been made possible for very diverse kinds of materials and applications [1][2][3]. Surface functionalization with different technical purposes has been thoroughly described [4][5][6][7][8]. In particular, surface micro-nanostructuring for achieving a superor ultra-hydrophobic behaviour leading to self-cleaning [9][10][11], anti-corrosion [12,13], anti-icing [14][15][16], and bacterial repellence [17,18] have been specially considered.…”

Section: Introductionmentioning

confidence: 99%

Modification of Ti6Al4V surface properties by combined DLW-DLIP hierarchical micro-nano structuring

Ocaña

Huerta-Murillo

Lasagni

et al. 2020

Advanced Optical Technologies

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AbstractThe use of pulsed laser irradiation techniques has proven to be a clearly effective procedure for the achievement of surface properties modification via micro-/nano-structuration, different conceptual approaches having been the subject of research and extensively reported in the literature. Completing the broad spectrum of applications developed mostly involving the generation of structured surfaces (particularly of metallic materials) with specific contact, friction and wear functionalities, the application of laser sources to the surface structuration of metal surfaces for the modification of their wetability and corrosion resistance properties is considered. The particular problems found for the generation of the appropriate surface microstructure able to replicate the hydrophobic behaviour of some live structures present in nature, their long term stability and their amenability to macroscopic scale are discussed along with innovative methods to generate the required hierarchical micro-/nano-structures by a combination of the DLW and DLIP techniques.

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Functionalization of surfaces by ultrafast laser micro/nano structuring

Cited by 9 publications

References 5 publications

High Resolution Microsphere‐Assisted Interference Microscopy for 3D Characterization of Nanomaterials

High Resolution Microsphere‐Assisted Interference Microscopy for 3D Characterization of Nanomaterials

Photonic jet: direct micro-peak machining

Modification of Ti6Al4V surface properties by combined DLW-DLIP hierarchical micro-nano structuring

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