Your phrase "the presence of micropores in the walls of mesopores" is strange. There are large and small pores. They are distributed by size. Porous materials are used for drug delivery. More often, these are organic substances that are not harmful to the body. If the pores are smaller than the drug molecules, then it will not be stored in the pores of the inorganic substance. It must be borne in mind that after the decomposition of the carrier into drugs in the stomach, the resulting substance was not toxic.

maybe I couldn't say my purpose properly, some materials have micro and mesoporous structure together and the position of micropores can be in the walls of mesopores. in this article you can see some picture and definition of this phenomena. of course, the large drug molecules can't store in the micropores, but does the presence of micropores have any advantages for loading the drug? for example: adhesion of the drug to walls be increased...

Specify your structure in the article: Fig., page, line, sentence.

Up to me this is the normal structure of a micro-mesoprous material. Micropores can be within the mesopores or maybe more rare, the pores are separeted in space. But micropores inside the mesopores is a normal structure.

How can You meassure that the micropores are inside the mesopores? That is more interesting.

actually, I don't measure it and I don't know that is there any methods for determination of the micropores position or not. as regards the method and raw materials that are used for synthesis, we can guess the location of the micropores (for example see Fig. 4.10. and the its description). but we can determine a lot of beneficial information of microporous structure by N2 Absorption-Desorption isotherms.

Dear Alireza. In Figure 4.10 there are micropores in the walls of the tube, and not in the mesopore. Thus, ceramic membrane filters can be obtained for the desalination of sea water.

Henrik Romar . I have the impression that you want to catch me in a weak competence and you yourself get into an unpleasant situation like this. Be kinder and get busy.

Regards.

Yuri.

Dr Mirgorod. I dont understand your comment. My comment was concerning the question.

Dear Yuri

It's not a tube, It's a mesopore.

I am opposed to the sentence "But the micropores inside the mesopores are a normal structure." Now I understand that you hold a different point of view. Of course, I had a view of a nanotube with mesopores. Such porous drug delivery materials are needed to use osmosis through micropores in the mesopores or vice versa.

Dear Yuri

thanks a lot for your help