Journal Article

Hybrid Nanosecond Laser Processing and Heat Treatment for Rapid Preparation of Super-Hydrophobic Copper Surface

Li, Chengying, Guo, Jian, Ma, Linxu, Wang, Lina, Deng, Cui, Shrotriya, Pranav, Zhao, Jingnan

2019

Overview

The super-hydrophobic copper surface was obtained by using a nanosecond pulsed laser. Different micro- and nano-structures were fabricated by changing the laser scanning interval and scanning speed, before heating in an electric heater at 150 °C for two hours to explore the effect of laser parameters and heat treatment on the wettability of the copper surface. It was found that the laser-treated copper surface is super-hydrophilic, and then, after the heat treatment, the surface switches to hydrophobic or even super-hydrophobic. The best super-hydrophobic surface’s apparent contact angle (APCA) was 155.6°, and the water sliding angle (WSA) was 4°. Super-hydrophobic copper is corrosion-resistant, self-cleaning, and dust-proof, and can be widely used in various mechanical devices.

• Publisher: MDPI AG
• Subject: Ablation / apparent contact angle / Contact angle / Copper / Corrosion resistance / Electric contacts / Etching / Heat / Heat treatment / Hydrophobic surfaces / Hydrophobicity / Laser applications / Laser beam heating / Laser processing / Lasers / Mechanical devices / Metal oxides / micro- and nano-structures / Morphology / Nanoparticles / nanosecond laser / Nanosecond pulses / Pulsed lasers / Scanning / Scanning electron microscopy / sliding angle / super-hydrophobic copper surface / Switches / Wettability