# gst: unusual properties of substances trapped in nanobubbles.

AA << modeled the behavior of nanobubbles appearing in van der Waals heterostructures and the behavior of substances trapped inside the bubbles. >>

<< The properties exhibited by substances inside the van der Waals nanobubbles are quite unusual. For example, water trapped inside a nanobubble displays a tenfold decrease in its dielectric constant and etches the diamond surface, something it would never do under normal conditions. Argon which typically exists in liquid form when in large quantities can become solid at the same pressure if trapped inside very small nanobubbles with a radius of less than 50 nanometers. >>

Substances trapped in nanobubbles exhibit unusual properties. Skolkovo Institute of Science and Technology. April 14, 2020.

https://phys.org/news/2020-04-substances-nanobubbles-unusual-properties.html

T. F. Aslyamov,  E. S. Iakovlev, et al. Model of graphene nanobubble: Combining classical density functional and elasticity theories. J. Chem. Phys. 152, 054705. Feb 3, 2020. 

https://aip.scitation.org/doi/10.1063/1.5138687

# gst: interface mobility enhances the bounce effect of bubbles

<< Theoretically, when a bubble reaches the surface of a pure liquid, the thin film of liquid between the bubble and the air above should quickly drain away, allowing the bubble to coalesce with the air. The same would be expected when two bubbles meet within the liquid or when two droplets of oil come together in water.  >>

<< Counterintuitively, bubbles or droplets reaching the highly mobile fluorocarbon liquid-air interface bounced off of the interface much more strongly than from the immobilized interface. The reason is that there is less friction on the mobile interface and thus less energy is lost during the bounce. "To our knowledge, our studies and simulations are the first to demonstrate an enhanced bounce effect due to interface mobility," >> Ivan U. Vakarelski.

When bubbles bounce back.  King Abdullah University of Science and Technology. Nov 13, 2019.

https://m.phys.org/news/2019-11-when-bubbles-bounce-back.html

Ivan U. Vakarelski, Fan Yang, et al. 

Mobile-surface bubbles and droplets coalesce faster but bounce stronger. Science Advances  25 Oct 2019:

Vol. 5, no. 10, eaaw4292 DOI: 10.1126/sciadv.aaw4292 

https://advances.sciencemag.org/content/5/10/eaaw4292