Robust fabrication of μ-patterns with tunable and durable wetting properties: hydrophilic to ultrahydrophobic via a vacuum process
作者： R. Jagdheesh , M. Diaz , S. Marimuthu , J. L. Ocana
DOI: 10.1039/C7TA01385J
关键词: Contact angle 、 Vacuum chamber 、 Passivation 、 Ultra-high vacuum 、 Wetting 、 Plasma cleaning 、 Surface finish 、 Materials science 、 X-ray photoelectron spectroscopy 、 Nanotechnology 、 Composite material
摘要: Micro-patterns with a single roughness were fabricated using a nanosecond laser source on stainless steel sheets to demonstrate a tunable and durable lotus effect via a vacuum process in a very short time interval. The wettability transitions of the vacuum processed μ-patterns were measured using the static water contact angle and found to be in the Cassie–Baxter state. The roll-off and static contact angle are 5° and 180°, respectively, for the μ-pillar and μ-channel structures. The surface exhibits bouncing and rolling of water droplets due to …
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