超润滑表面液滴在温度及力场作用下的钉扎/滑动行为及内在机制

作者：Gu Jianfeng; Huang Jiuhui; Li Dayu; Liu Lin; Zhu Suwan^*; Xiao Yi^*

来源：Acta Materiae Compositae Sinica, 2023, 40(4): 2209-2215.

DOI：10.13801/j.cnki.fhclxb.20220701.001

• droplet manipulation
• femtosecond laser
• microfluidics
• stimuli-response
• ultra-lubricated surface

In recent years, stimuli-responsive slippery liquid-infused porous surfaces (SLIPSs) have attracted widespread attention in the field of microfluidic manipulation. However, most reported responsive SLIPSs function under a single stimulus, which are challenging to satisfy the generalized application scenarios. Here, a kind of dual-responsive slippery surface (DRSS) is fabricated through femtosecond laser cross-scanning method. Relying on the synergic action of temperature and force field, the sliding/pinning behaviors of water droplets on DRSS can be dynamically controlled. The impact of diverse parameters on the critical sliding volume of droplets is systematically investigated, including lubricant infusion amount, groove depth and spacing. The dynamic mechanism of droplet sliding/pinning behaviors is revealed. This kind of DRSS could be used in the related fields such as lab-on-a-chip and microfluidic reactors. ? 2023 Beijing University of Aeronautics and Astronautics (BUAA).

• 单位
  中国科学技术大学; 合肥工业大学