Laser Nanopatterning for Wettability Applications

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Leonardo Orazi ◽  
Iaroslav Gnilitskyi ◽  
Ana Paula Serro
Keyword(s):  
Stainless Steel ◽  
Femtosecond Laser ◽  
High Speed ◽  
Surface Structures ◽  
Periodic Surface ◽  
Hydrophobic Behavior

We report on periodic, homogeneous nanoripples fabricated on stainless steel (SS), copper (Cu), and aluminum (Al) substrates using an ytterbium pulsed femtosecond laser. These structures called laser induced periodic surface structures (LIPSS) are processed at a relatively high-speed and over large areas. This paper investigates the effect of LIPSS on a wettability behavior of SS, Cu, and Al surfaces. It is shown that nanoripples significantly influenced the wettability character of these metals turning them from hydrophilic to hydrophobic behavior.

Laser Nanopatterning for Wettability Applications

2016 ◽  
Author(s):  
Leonardo Orazi ◽  
Iaroslav Gnilitskyi ◽  
Ana Paula Serro
Keyword(s):  
Stainless Steel ◽  
Femtosecond Laser ◽  
Behavioral Change ◽  
High Speed ◽  
Surface Structures ◽  
Periodic Surface ◽  
Hydrophobic Behavior ◽  
Short Time

We report on periodic, homogenous nanoripples fabricated on stainless steel (SS), copper (Cu) and aluminium (Al) substrates using an ytterbium pulsed femtosecond laser. These structures called Laser Induced Periodic Surface Structures (LIPSS) are processed at a relatively high-speed allowing us to fabricate quasi regular nanoripples in a short time over large areas. This paper investigates the effect of LIPSS on wettability behavior of SS, Cu and Al surfaces. It is shown that nanoripples significantly influenced the wettability character of these metals turning them from hydrophilic to hydrophobic behavior. The most notable behavioral change is observed for SS and Al, where strong hydrophobicity is observed after the generation of LIPSS.

scholarly journals High-speed manufacturing of highly regular femtosecond laser-induced periodic surface structures: physical origin of regularity

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Iaroslav Gnilitskyi ◽  
Thibault J.-Y. Derrien ◽  
Yoann Levy ◽  
Nadezhda M. Bulgakova ◽  
Tomáš Mocek ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Speed ◽  
Surface Structures ◽  
Physical Origin ◽  
Periodic Surface

scholarly journals Cell and tissue response to nanotextured Ti6Al4V and Zr implants using high-speed femtosecond laser-induced periodic surface structures

2019 ◽  
Vol 21 ◽  
pp. 102036 ◽  
Author(s):  
Iaroslav Gnilitskyi ◽  
Maksym Pogorielov ◽  
Roman Viter ◽  
Ana Maria Ferraria ◽  
Ana Patrícia Carapeto ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Speed ◽  
Tissue Response ◽  
Surface Structures ◽  
Periodic Surface

scholarly journals Tribological Properties of High-Speed Uniform Femtosecond Laser Patterning on Stainless Steel

Lubricants ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 83 ◽  
Author(s):  
Iaroslav Gnilitskyi ◽  
Alberto Rota ◽  
Enrico Gualtieri ◽  
Sergio Valeri ◽  
Leonardo Orazi
Keyword(s):  
Stainless Steel ◽  
Tribological Properties ◽  
High Speed ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Surface Structures ◽  
Stribeck Curve ◽  
Periodic Surface ◽  
Surface Conditions ◽  
Laser Patterning

In this work, an analysis of the tribological performance of laser-induced periodic surface structures (LIPSS) treated X5CrNi1810 stainless steel was conducted. The approach followed by authors was to generate LIPSS-patterned circular tracks, composed of radial straight grooves with uniform angular periodicity. This permitted to measure the tribological properties in a pin-on-flat configuration, keeping fixed the orientation between the grooves and the sliding direction. A Stribeck curve was measured, as well as the consequent wear. A deep analysis of the sub-surface conditions after LIPSS generation was moreover performed using Focused Ion Beam (FIB) cross-section.

Maskless formation of uniform subwavelength periodic surface structures by double temporally-delayed femtosecond laser beams

2019 ◽  
Vol 471 ◽  
pp. 516-520 ◽  
Author(s):  
Sohail A. Jalil ◽  
Jianjun Yang ◽  
Mohamed ElKabbash ◽  
Subhash C. Singh ◽  
Chunlei Guo
Keyword(s):  
Femtosecond Laser ◽  
Surface Structures ◽  
Laser Beams ◽  
Periodic Surface
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