Zhang Shiyu, Zhao Lingzhe, Yu Meike, Guo Jinwei, Liu Chuntian, Zhu Chunyuan, Zhao Meirong, Huang Yinguo, Zheng Yelong
State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, People's Republic of China.
Langmuir. 2024 May 14;40(19):9873-9891. doi: 10.1021/acs.langmuir.3c03967. Epub 2024 May 2.
Inspired by nature, superhydrophobic surfaces have been widely studied. Usually the wettability of a superhydrophobic surface is quantified by the macroscopic contact angle. However, this method has various limitations, especially for precision micro devices with superhydrophobic surfaces, such as biomimetic artificial compound eyes and biomimetic water strider robots. These precision micro devices with superhydrophobic surfaces proposed a higher demand for the quantification of contact angles, requiring contact angle quantification technology to have micrometer-scale measurement capabilities. In this review, it is proposed to achieve micrometer-scale quantification of superhydrophobic surface contact angles through droplet adhesion characteristics (adhesion force and contact radius). Existing contact angle quantification techniques and droplet characteristics' measurement methods were described in detail. The advancement of micrometer-scale quantification technology for the contact angle of superhydrophobic surfaces will enhance our understanding of superhydrophobic surfaces.
受自然启发，超疏水表面已得到广泛研究。通常，超疏水表面的润湿性通过宏观接触角来量化。然而，这种方法存在各种局限性，特别是对于具有超疏水表面的精密微器件，如仿生人工复眼和仿生水黾机器人。这些具有超疏水表面的精密微器件对接触角的量化提出了更高的要求，要求接触角量化技术具备微米级测量能力。在这篇综述中，提出通过液滴粘附特性（粘附力和接触半径）实现超疏水表面接触角的微米级量化。详细描述了现有的接触角量化技术和液滴特性测量方法。超疏水表面接触角微米级量化技术的进步将增进我们对超疏水表面的理解。
