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Article

On the Insignificant Role of the Oxidation Process on Ultrafast High-Spatial-Frequency LIPSS Formation on Tungsten

1
UJM-Saint-Etienne, CNRS, Laboratoire Hubert Curien UMR 5516, Institute of Optics Graduate School, University Lyon, F-42023 St-Etienne, France
2
Department of Physics, University of Ottawa, STEM Complex, 150 Louis-Pasteur, Ottawa, ON K1N 6N5, Canada
3
Department of Mechanical Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON K1N 6N5, Canada
4
Centre for Research in Photonics, University of Ottawa, 25 Templeton St, Ottawa, ON K1N 6N, Canada
*
Author to whom correspondence should be addressed.
Academic Editors: Jörn Bonse, Peter Simon and Jürgen Ihlemann
Nanomaterials 2021, 11(5), 1069; https://doi.org/10.3390/nano11051069
Received: 29 March 2021 / Revised: 16 April 2021 / Accepted: 18 April 2021 / Published: 22 April 2021
(This article belongs to the Special Issue Laser-Generated Periodic Nanostructures)
The presence of surface oxides on the formation of laser-induced periodic surface structures (LIPSS) is regularly advocated to favor or even trigger the formation of high-spatial-frequency LIPSS (HSFL) during ultrafast laser-induced nano-structuring. This paper reports the effect of the laser texturing environment on the resulting surface oxides and its consequence for HSFLs formation. Nanoripples are produced on tungsten samples using a Ti:sapphire femtosecond laser under atmospheres with varying oxygen contents. Specifically, ambient, 10 mbar pressure of air, nitrogen and argon, and 10−7 mbar vacuum pressure are used. In addition, removal of any native oxide layer is achieved using plasma sputtering prior to laser irradiation. The resulting HSFLs have a sub-100 nm periodicity and sub 20 nm amplitude. The experiments reveal the negligible role of oxygen during the HSFL formation and clarifies the significant role of ambient pressure in the resulting HSFLs period. View Full-Text
Keywords: ultrafast laser nanostructuring; femtosecond laser; oxidation; sputtering; laser-induced periodic surface structures; high-spatial-frequency LIPSS; vacuum; Marangoni flow ultrafast laser nanostructuring; femtosecond laser; oxidation; sputtering; laser-induced periodic surface structures; high-spatial-frequency LIPSS; vacuum; Marangoni flow
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MDPI and ACS Style

Dominic, P.; Bourquard, F.; Reynaud, S.; Weck, A.; Colombier, J.-P.; Garrelie, F. On the Insignificant Role of the Oxidation Process on Ultrafast High-Spatial-Frequency LIPSS Formation on Tungsten. Nanomaterials 2021, 11, 1069. https://doi.org/10.3390/nano11051069

AMA Style

Dominic P, Bourquard F, Reynaud S, Weck A, Colombier J-P, Garrelie F. On the Insignificant Role of the Oxidation Process on Ultrafast High-Spatial-Frequency LIPSS Formation on Tungsten. Nanomaterials. 2021; 11(5):1069. https://doi.org/10.3390/nano11051069

Chicago/Turabian Style

Dominic, Priya, Florent Bourquard, Stéphanie Reynaud, Arnaud Weck, Jean-Philippe Colombier, and Florence Garrelie. 2021. "On the Insignificant Role of the Oxidation Process on Ultrafast High-Spatial-Frequency LIPSS Formation on Tungsten" Nanomaterials 11, no. 5: 1069. https://doi.org/10.3390/nano11051069

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