Hot Liquid Marbles*

Droplets in non-wetting states have minimal adhesion and exceptional mobility due to the presence of a gas layer between the liquid and its substrate. On superhydrophobic surfaces, the lubricating gas layer is maintained by hydrophobic texture at the solid surface. Here, the liquid only touches the tops of the texture and primarily contacts air [1]. Alternatively, the hydrophobic texture can be directly embedded at the liquid surface by covering the drop with hydrophobic particles. Such coated drops, known as liquid marbles [2], have been extensively studied for their low adhesion and high mobility [3]. In this presentation, we discuss the stability and adhesion of marbles containing hot liquids depending on their temperature, the substrate wettability, and the liquid volatility.

References

(1) A. Lafuma & D. Quéré, Nature Materials, 2, 457-460, 2003.

(2) P. Aussillous & D. Quéré, Nature, 411, 924-927, 2001.

(3) P. Jin et al. The Journal of Chemical Physics, 158, 204709, 2023.