|We showed that dissolving the solvent enclosed within a silica/PDMS colloidal porous shell causes it to deform.
This phenomenon can be interpreted in terms of equivalent external pressure due to capillary forces acting on the shell, just like when the solvent enclosed in a porous shell evaporates.
We model these phenomenons in the framework of thin shell elasticity, by decreasing the inner volume of an initially spherical surface. The collapsed shapes are scale-free, depending mainly on the ratio between the thickness and the radius of the shell. Our results are then applicable to other systems such as spherical containers under hydrostatic pressure, deflating soccer balls, vesicles under osmotic stress, pollen, red blood cells and virus capsids.
|Viscous-core (very) elastic shell||
|Somewhat plastic shell buckling|