Wetting

Wetting is the ability of a liquid to spread over a solid surface. The degree of wetting is called wettability, and is determined by a force balance between the cohesive forces of the liquid and the adhesive forces between the surface and the liquid.

Latest Research and Reviews

  • Research |

    An air purification strategy is presented that moves air in the form of bubbles through an ion-doped conjugated polymer-coated matrix, which captures larger particulate matter, infiltrated with a selected functional liquid, which captures smaller particulate matter.

    • Yunmao Zhang
    • , Yuhang Han
    •  & Xu Hou
    Nature, 1-7
  • Research
    | Open Access

    Developing an oscillating actuator that can directly convert solar energy into mechanical energy is highly desirable. Here, authors report a solvent-assisted light-driven oscillator by porous film that achieves excellent oscillating actuation performance and can even oscillate by carrying a load under light irradiation.

    • Jingjing Li
    • , Linlin Mou
    •  & Yongsheng Chen
  • Research
    | Open Access

    Spontaneous droplet jumping and control of dropwise condensation are relevant for water-harvesting, heat transfer and anti-frosting applications. The authors design a superhydrophobic surface with microscale thin-walled lattice structure to achieve effective jumping of droplets with specified radius range.

    • Chen Ma
    • , Li Chen
    •  & Quanshui Zheng
  • Research
    | Open Access

    Liquid metals that have enormous surface tension are difficult to pattern into films. Here, authors report the spontaneous and selective wetting of a gallium-based liquid metal, which is induced by imbibition on a micro-structured metallized substrate.

    • Ji-Hye Kim
    • , Sooyoung Kim
    •  & Hyung-Jun Koo
  • Research
    | Open Access

    Wang et al. report an underwater capillary adhesive that is strengthened by the conjunction of inner water bridge and outer air shell, and switched timely by a small direct current voltage. The design can also be constructed on flexible tapes, which can be applied to non-conductive substrates.

    • Huanxi Zheng
    • , Jing Li
    •  & Zuankai Wang
  • Research
    | Open Access

    Elastic deformation of soft substrates occurs upon wetting, yet it is challenging to follow its dynamics at a microscale. Khattak et al. show that the force required to pull a droplet along a soft surface decreases monotonically as the film thickness decreases and explain the phenomenon using a scaling analysis.

    • Hamza K. Khattak
    • , Stefan Karpitschka
    •  & Kari Dalnoki-Veress

News and Comment