News for hackers. Stuff that matters.

A comment on Unimpeded Permeation of Water Through Helium-Leak–Tight Graphene-Based Membranes. Parent comment

Re:Unimpeded Permeation of Water Through Helium-Leak–Tight G... by dieselgate on Wednesday February 15, 2023 @07:05PM (#34812907)
It sort of seems like a bag that can hold a small object, like a golf ball, but something larger like a watermelon would "fall through" the bag without it tearing/breaking.

Pretty interesting stuff but I'm not too aware of the research field, just live in a place that's wet.

[ Parent | on HN ]
Re:Unimpeded Permeation of Water Through Helium-Leak–Tight G... by emmelaich on Wednesday February 15, 2023 @07:18PM (#34813041)
In particular[0], the bigger stuff (water) blocks the smaller.

> Diffusion of other molecules is blocked by reversible narrowing of the capillaries in low humidity and/or by their clogging with water.

So in the absence of the water, the He would escape.

[0] heh

[ Parent | on HN ]
Re:Unimpeded Permeation of Water Through Helium-Leak–Tight G... by dieselgate on Wednesday February 15, 2023 @08:15PM (#34813603)
indeed thanks for specifying
[ Parent | on HN ]