Comparisons (IMAGE) Science China Press Caption This shows comparisons of the macroscopic contact angle predicted by the mechanism-based model and the Cassie model for a droplet sitting on a substrate with exponential hydrophilicity. Credit ©Science China Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.