Superhydrophylic textures fabricated by femtosecond laser pulses on sub-micro- and nano-crystalline titanium surfaces

摘要

Sub-micron quasi-regular surface textures were fabricated on surfaces of pure titanium (VT1-0) with micro-and ultrafine-grained bulk structures by multiple femtosecond laser pulses in the scanning mode and characterized by scanning electron and atomic force microscopy. Their wetting characteristics acquired for the initial non-textured and as-textured samples, as well as upon ultrasonic and plasma cleaning, demonstrate corresponding drastic changes of the wetting angles from 87 degrees to <= 10 degrees, with much more pronounced contamination, cleaning and wetting effects for the ultrafine-grained titanium.