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arXiv · 2411.17324

Wettability and Color Change of Copper by Controlling Area Fraction of Laser Ablated Surface

Mantas Gaidys·Stella Maragkaki·Alexandros Mimidis·Antonis Papadopoulos·Andreas Lemonis·Evangelos Skoulas·Andrius Žemaitis·Emmanuel Stratakis·Mindaugas Gedvilas
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Abstract

In this research, wettability control by area fraction of laser ablated surface of copper is presented. The functional surfaces with full wettability control from highly hydrophilic to super-hydrophobic were created on copper by nanosecond (ns) and picosecond (ps) laser irradiation. The area fraction and color change were evaluated by digital image processing of microscopic images of the laser-ablated copper surface. The control of the wetting angle from almost 0 degrees to 132 degrees was achieved for both ps and ns pulses by controlling the area fraction of the laser-ablated surface. Cassie, Cassie-Baxter, and Wenzel models were adopted to explain the experimental results. For the first time, the wettability and color of copper were controlled by controlling the area fraction of the laser-ablated surface. It is expected that the current results make an impact on the heat exchanger technology of water heat sinks, cooling units, atmospheric water generators, and fog harvesting and impact numerous applications from power plants to solar thermal water systems devices where highly-hydrophilic to super hydrophobic copper can be applied.

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physics.opticscond-mat.mtrl-sciphysics.app-phphysics.comp-ph

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BibTeXRIS

Mantas Gaidys, Stella Maragkaki, Alexandros Mimidis, Antonis Papadopoulos, Andreas Lemonis, Evangelos Skoulas, Andrius Žemaitis, Emmanuel Stratakis, Mindaugas Gedvilas. 2024-11-26. Wettability and Color Change of Copper by Controlling Area Fraction of Laser Ablated Surface. https://doi.org/10.3390/app16115583

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