Department of Mechanical Engineering, College of Engineering & Applied Science, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA.
Adv Mater. 2012 Nov 20;24(44):5963-6. doi: 10.1002/adma.201202516. Epub 2012 Sep 4.
An oil droplet in water can be in the Cassie state (with water and/or air trapped between the solid and oil) with a high contact angle (top left) or in the Wenzel state (top right). Depending on the roughness of the brass substrate, both states with high (bottom left) and low (bottom right) contact angle are observed.
水中的油滴可以处于 Cassie 状态（固体和油之间存在水和/或空气），具有高接触角（左上角），也可以处于 Wenzel 状态（右上角）。根据黄铜基底的粗糙度，可以观察到具有高（左下角）和低（右下角）接触角的两种状态。
