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

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.

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

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.

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

scholarly journals Titanium surface modification using femtosecond laser with 1013–1015 W/cm2 intensity in vacuum

2012 ◽  
Vol 31 (1) ◽  
pp. 29-36 ◽  
Author(s):  
M. Trtica ◽  
D. Batani ◽  
R. Redaelli ◽  
J. Limpouch ◽  
V. Kmetik ◽  
...  
Keyword(s):  
Surface Modification ◽  
Femtosecond Laser ◽  
Titanium Surface ◽  
Femtosecond Lasers ◽  
Single Pulse ◽  
Surface Structures ◽  
Pulse Regime ◽  
Periodic Surface ◽  
Reduced Intensity ◽  
Surface Changes

AbstractThe response of titanium surface irradiated with high intensity (1013 – 1015 W/cm2) Ti:sapphire laser was studied in vacuum. Most of the reported investigations were conducted with nano- to femtosecond lasers in gas atmospheres while the studies of titanium surface interacting with femtosecond laser in vacuum are scarce. The laser employed in our experiment was operating at 800 nm wavelength and pulse duration of 60 fs in single pulse regime. The observed surface changes and phenomena are (1) creation of craters, (2) formation of periodic surface structures at the reduced intensity, and (3) occurrence of plasma in front the target. Since microstructuring of titanium is very interesting in many areas (industry, medicine), it can be concluded from this study that the reported laser intensities can effectively be applied for micromachining of the titanium surface (increasing the roughness, formation of parallel periodic surface structures etc.).

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