Evolution of wetting of a copper surface treated with nanosecond laser radiation
M.M. Vasilev1,2, A.A. Rodionov1,2, Yu.G. Shukhov1, F.A. Samokhvalov1,2, S.V. Starinskiy1,2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk,Russia
2Novosibirsk State University, Novosibirsk,Russia
Keywords: nanosecond pulsed laser ablation, surface wettability properties, surface morphology
Abstract
Laser radiation is a leading tool in the field of materials processing and design. Recently, the prob-lem of controlled changes in the wetting properties of metals realized by the micro- and nanostructuring of surfaces has been actively investigated. In the pre-sent paper, the influence of the conditions of nano-second laser treatment on the wetting properties of a copper surface in the mode of formation of a ran-domly distributed hierarchical structure is investigat-ed. Special attention is paid to the evolution of the contact angle of wetting over time. The mechanisms of changing the wetting properties over time are con-sidered. It is shown that the overlap of laser spots is more important than the fluence in the beam from the point of view of hydrophobization of the copper surface.
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