固着纳米水滴接触角滞后的分子动力学模拟

摘要

Using molecular dynamics simulation ,contact angle hysteresis for sessile water nanodroplets is studied.Simulation results show whether the surfaces are smooth or nanotextured rough , contact angle hysteresis increases with the solid surface potential energy increasing .Under the same solid surface po-tential energy , contact angle hysteresis of sessile water nanodroplets on nanotextured rough surfaces is bigger than on smooth , and the square column matrix form surface has a stronger contact angel hysteresis than the fencing form surface .%采用分子动力学模拟技术，研究了固着纳米水滴的接触角滞后。模拟结果表明，无论是光滑壁面还是纳米粗糙壁面，随着壁面作用势能的增大，纳米水滴的接触角滞后增大。在壁面作用势能相同的条件下，纳米水滴在纳米粗糙壁面上的接触角滞后要大于光滑壁面，方柱矩阵形比栏栅形纳米粗糙壁面的接触角滞后更大。