Wettability of laser-textured copper surface after a water-bath process

Hui Chung Cheng, Tien Li Chang, Chao Sung Lin, Ping Hei Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Although the wettability of ultrafast laser-textured surfaces has been widely studied recently, most studies have only investigated the transition mechanism of surface wettability after laser irradiation with elapsed time. It is already known that the laser-textured copper surface experiences a wettability transition from hydrophilicity to hydrophobicity due to the occurrence of partial deoxidation from CuO to Cu2O. This study investigates the surface wettability change of ultrafast (of the order of picoseconds) laser-textured copper surfaces treated with water baths of 50 °C and 100 °C. The pulse duration of the laser is 7 ps, the wavelength of the laser is 532 nm, and the fluence range is controlled at 1.27-2.97 J/cm2. This simple treatment changes laser-textured surfaces from hydrophobic to hydrophilic ones. Detailed surface chemical analyses revealed that the formation of Cu(OH)2 on top of the copper surfaces was attributed to the change in wettability.

Original languageEnglish
Article number125140
JournalAIP Advances
Volume9
Issue number12
DOIs
Publication statusPublished - 2019 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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