接触角
润湿
碳纳米管
磁滞
材料科学
纳米技术
复合材料
凝聚态物理
物理
作者
Zuankai Wang,Carlos Botella López,Amir Hirsa,Nikhil Koratkar
摘要
The authors report the impact response of water droplets impinging on superhydrophobic carbon nanotube arrays and observe that arrays with different wetting properties display significantly different responses. For an array with a static contact angle of 163°, the droplet bounces off the surface several times, while for an array with a reduced contact angle of 140°, the droplet does not rebound and remains pinned. The contact angle hysteresis and contact line pinning for the 140° array suggest that the momentum of the droplet during the initial impact enables it to penetrate and displace the air pockets that are responsible for the superhydrophobicity of the array under static conditions.
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