I have silica nano particles with porous structure . how can a helium of other gas be placed inside silica tiny pores and how to detect that gas?

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Ali Nematollahzadeh

I suggest running BET experiment using the desired gas.

The analysis will provide the amount of the gas (pore volume!) that places inside. The analysis applicable for pores between ca. 1 nm and 100 nm,

Or you may use BET principle to build a set-up to push the gas inside the pores.

Manaf Aldaoseri

dear Mr.Ali Nematollahzadeh.

thank you so much.

Alan F Rawle

To add to the response above, He is normally used to calculate the dead space in a BET experiment with the N2 molecule (~ 16.2 square Angstroms) used to probe the active surface area.