Yes, there will be issues with the low SSA. Why do you want to do BET on aluminum? What does SSA tell you in addition to SA (length X breadth)? The gas absorption will be tiny. Are you envisaging N2 BET? If i I can't see this working.

Alan F Rawle thanks for replying, I have graphene used as the thin-film coated by using lifted hele shaw cell method. I plan on using aluminum to use it later as substrate for the thin-film to undergo Cyclic voltammetry. I'm hoping i wont get a low SSA since there are results that disagree to it..

Hello,

I think It won't work that way. first of all, BET can be performed only on nano or microstructures with good porosity. However, maybe you can go for Krypton.

Thank you!

Let me see if I got it right. You want to deposit a thin film on an aluminum substrate?

If yes, gas adsorption might work depending on how high is your surface area/how thick is your film, as Alan F Rawle already advised, gas adsorption needs the gas to be adsorbed on the surface, and aluminum sheets usually have low surface area by themselves.

The manual within your equipment usually states the minimum surface area you must have to perform the analysis.