Subwavelength direct laser nanopatterning via microparticle arrays for functionalizing metallic surfaces

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Subwavelength direct laser nanopatterning via microparticle arrays for functionalizing metallic surfaces. / Romano, Jean-Michel; Ahmed, Rajib; Garcia Giron, Antonio; Penchev, Pavel; Butt, Haider; Dellea, Olivier; Sikosana, Melissa; Helbig, Ralf; Werner, Carsten; Dimov, Stefan.

In: Journal of Micro and Nano-Manufacturing, Vol. 7, No. 1, 010901, 11.04.2019.

Research output: Contribution to journalArticlepeer-review

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@article{95edbdd892ca4444b2ce5b6e0bce0de5,
title = "Subwavelength direct laser nanopatterning via microparticle arrays for functionalizing metallic surfaces",
abstract = "Functionalized metallic nanofeatures can be selectively fabricated via ultrashort laser processing; however, the cost-effective large-area texturing, intrinsically constrained by the diffraction limit of light, remains a challenging issue. A high-intensity near-field phenomenon that takes place when irradiating microsized spheres, referred to as photonic nanojet (PN), was investigated in the transitional state between geometrical optics and dipole regime to fabricate functionalized metallic subwavelength features. Finite element simulations were performed to predict the PN focal length and beam spot size, and nanofeature formation. A systematic approach was employed to functionalize metallic surface by varying the pulse energy, focal offset, and number of pulses to fabricate controlled array of nanoholes and to study the generation of triangular and rhombic laser-induced periodic surface structures (LIPSS). Finally, large-area texturing was investigated to minimize the dry laser cleaning (DLC) effect and improve homogeneity of PN-assisted texturing. Tailored dimensions and densities of achievable surface patterns could provide hexagonal light scattering and selective optical reflectance for a specific light wavelength. Surfaces exhibited controlled wetting properties with either hydrophilicity or hydrophobicity. No correlation was found between wetting and microbacterial colonization properties of textured metallic surfaces after 4 h incubation of Escherichia coli. However, an unexpected bacterial repellency was observed.",
keywords = "hexagonal closepacked monolayer, photonic nanojet, laser ablation, LIPSS, sub-micron patterning",
author = "Jean-Michel Romano and Rajib Ahmed and {Garcia Giron}, Antonio and Pavel Penchev and Haider Butt and Olivier Dellea and Melissa Sikosana and Ralf Helbig and Carsten Werner and Stefan Dimov",
year = "2019",
month = apr,
day = "11",
doi = "10.1115/1.4042964",
language = "English",
volume = "7",
journal = "Journal of Micro and Nano-Manufacturing",
issn = "2166-0468",
publisher = "ASME (American Society of Mechanical Engineers)",
number = "1",

}

RIS

TY - JOUR

T1 - Subwavelength direct laser nanopatterning via microparticle arrays for functionalizing metallic surfaces

AU - Romano, Jean-Michel

AU - Ahmed, Rajib

AU - Garcia Giron, Antonio

AU - Penchev, Pavel

AU - Butt, Haider

AU - Dellea, Olivier

AU - Sikosana, Melissa

AU - Helbig, Ralf

AU - Werner, Carsten

AU - Dimov, Stefan

PY - 2019/4/11

Y1 - 2019/4/11

N2 - Functionalized metallic nanofeatures can be selectively fabricated via ultrashort laser processing; however, the cost-effective large-area texturing, intrinsically constrained by the diffraction limit of light, remains a challenging issue. A high-intensity near-field phenomenon that takes place when irradiating microsized spheres, referred to as photonic nanojet (PN), was investigated in the transitional state between geometrical optics and dipole regime to fabricate functionalized metallic subwavelength features. Finite element simulations were performed to predict the PN focal length and beam spot size, and nanofeature formation. A systematic approach was employed to functionalize metallic surface by varying the pulse energy, focal offset, and number of pulses to fabricate controlled array of nanoholes and to study the generation of triangular and rhombic laser-induced periodic surface structures (LIPSS). Finally, large-area texturing was investigated to minimize the dry laser cleaning (DLC) effect and improve homogeneity of PN-assisted texturing. Tailored dimensions and densities of achievable surface patterns could provide hexagonal light scattering and selective optical reflectance for a specific light wavelength. Surfaces exhibited controlled wetting properties with either hydrophilicity or hydrophobicity. No correlation was found between wetting and microbacterial colonization properties of textured metallic surfaces after 4 h incubation of Escherichia coli. However, an unexpected bacterial repellency was observed.

AB - Functionalized metallic nanofeatures can be selectively fabricated via ultrashort laser processing; however, the cost-effective large-area texturing, intrinsically constrained by the diffraction limit of light, remains a challenging issue. A high-intensity near-field phenomenon that takes place when irradiating microsized spheres, referred to as photonic nanojet (PN), was investigated in the transitional state between geometrical optics and dipole regime to fabricate functionalized metallic subwavelength features. Finite element simulations were performed to predict the PN focal length and beam spot size, and nanofeature formation. A systematic approach was employed to functionalize metallic surface by varying the pulse energy, focal offset, and number of pulses to fabricate controlled array of nanoholes and to study the generation of triangular and rhombic laser-induced periodic surface structures (LIPSS). Finally, large-area texturing was investigated to minimize the dry laser cleaning (DLC) effect and improve homogeneity of PN-assisted texturing. Tailored dimensions and densities of achievable surface patterns could provide hexagonal light scattering and selective optical reflectance for a specific light wavelength. Surfaces exhibited controlled wetting properties with either hydrophilicity or hydrophobicity. No correlation was found between wetting and microbacterial colonization properties of textured metallic surfaces after 4 h incubation of Escherichia coli. However, an unexpected bacterial repellency was observed.

KW - hexagonal closepacked monolayer

KW - photonic nanojet

KW - laser ablation

KW - LIPSS

KW - sub-micron patterning

U2 - 10.1115/1.4042964

DO - 10.1115/1.4042964

M3 - Article

VL - 7

JO - Journal of Micro and Nano-Manufacturing

JF - Journal of Micro and Nano-Manufacturing

SN - 2166-0468

IS - 1

M1 - 010901

ER -