Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Why do metals become superhydrophilic during nanosecond laser processing? Design of superhydrophilic, anisotropic and biphilic surfaces
Δημιουργός/Συγγραφέας:	Vasiliev, Mikhail M. Shukhov, Yuri G. Rodionov, Alexey A. Sulyaeva, Veronica S. Markovich, Dmitriy M. Starinskiy, Sergey V.
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	01694332
DOI:	10.1016/j.apsusc.2024.159392
Περίληψη:	This research investigates the impact of the surrounding environment on the characteristics of copper, nickel and tin during nanosecond laser processing. By comparing the results of processes conducted in vacuum and air, we conclude that changes in wetting properties cannot be solely attributed to development of surface microstructure. To elucidate this phenomenon, we conducted model experiments using a tin target. Laser processing parameters for the tin target were established, involving deep cavity melting without ablation, resulting in highly evolved material morphology. Under these conditions, laser processing in air did not lead to metal hydrophilization. Therefore, our study demonstrates that the primary cause of changes in material wetting properties during nanosecond laser processing is the re-deposition of ablation products onto the material surface. These products form a nanoporous layer that enhances wicking capabilities and subsequently serves as a sorbent for various impurities, gradually leading to the hydrophobization of most commonly used materials. The proposed mechanism opens the possibility for the development of new methods to create materials with biphilic and anisotropic wetting properties. The key insight lies in the control of the thickness of the nanoporous layer, as it emerges as a pivotal factor dictating wettability properties and wicking capability.
Τίτλος πηγής δημοσίευσης:	Applied Surface Science
Τόμος/Κεφάλαιο:	653
Θεματική Κατηγορία:	[EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics [EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	nanosecond laser ablation laser processing surface morphology wettability superhydrophilic biphilic anisotropic
Χρηματοδότης:	Russian Science Foundation
EU Grant identifier:	19-79-30075
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.apsusc.2024.159392
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο