Xue Chonghua, Lott Jared T, Kolachalama Vijaya B
Langmuir. 2019 Mar 12;35(10):3672-3679. doi: 10.1021/acs.langmuir.8b04043. Epub 2019 Feb 26.
Size and contact angle of liquid drops are fundamental parameters in interfacial science. Accurate estimation of these parameters can provide objective information regarding several properties of the contacting surface. We leveraged principles of texture analysis to estimate the contact angle and the drop diameter from videos of evaporating sessile liquid drops deposited on solid surfaces. Specifically, we used a Harris corner detector to locate the corners and dynamically estimate the changing size and a Gabor wavelet-based approach to estimate the varying contact angle of the evaporating sessile drop. We demonstrated the ability of our approach to accurately estimate size and contact angles of drops deposited on a hydrophilic glass slide and on a paraffin film representing a hydrophobic surface. We also estimated the contact angle and size of drops deposited on horizontal and tilted surfaces to generate symmetric and asymmetric drop shapes, respectively. A software application that has the ability to analyze videos of sessile liquid drops as inputs is provided, and this tool can generate plots of the estimated contact angle and the drop diameter as a function of frame number.
液滴的尺寸和接触角是界面科学中的基本参数。准确估计这些参数可以提供有关接触表面多种性质的客观信息。我们利用纹理分析原理，从沉积在固体表面的蒸发静态液滴的视频中估计接触角和液滴直径。具体而言，我们使用哈里斯角点检测器来定位角点并动态估计变化的尺寸，以及基于伽柏小波的方法来估计蒸发静态液滴不断变化的接触角。我们展示了我们的方法准确估计沉积在亲水性玻璃载玻片和代表疏水表面的石蜡膜上的液滴的尺寸和接触角的能力。我们还估计了沉积在水平和倾斜表面上的液滴的接触角和尺寸，分别生成对称和不对称的液滴形状。提供了一个能够分析作为输入的静态液滴视频的软件应用程序，该工具可以生成估计接触角和液滴直径作为帧数函数的图。
