Wettability control on vertically-aligned multi-walled carbon nanotube surfaces withoxygen pulsed DC plasma and CO_2 laser treatments

摘要

This work presents a method to obtain control on wettability of vertically-aligned multi-walled carbonnanotube surfaces, using oxygen pulsed directly current plasma and CO_2 laser irradiation. Superhydrophilicsurfaces were obtained by the oxygen pulsed DC plasma treatment to incorporate polar groups on VACNT.The CO_2 laser was used to irradiate the functionalized samples, at different power levels, in order to restorethe superhydrophobic characteristic. Evaluation of polar and dispersive components of superficial energywas performed by Owens and Wendt method.