@0h00000000 Lol.
Basically you need a membrane a micron or so thick, with few-hundred-nm wide pores punched through it.
It needs to be heated on one side to a decent bit above ambient, while the other side is held at ambient or ideally chilled.
It needs to be thermally nonconductive enough that you don't burn an absurd amount of energy maintaining the thermal gradient.
And it needs to be stretched across the aperture of your pump/engine/fan/whatever on some kind of support grid that will let it maintain the required static pressure without rupturing.