Thanks to the collaboration with the groups of Prof. Jörg Matysik and Prof. Dirk Enke, at the Universität Leipzig, the work done by my student, Juan Diego Barboza-Carmona, has been accepted and published online in the Journal of Sol-Gel Science and Technology (Springer).
An integral overview of the porous structure of hydrophobic acid and base-catalyzed sodium silicate-based aerogels was done by using hyperpolarized 129Xe NMR spectroscopy, together with other classical characterization techniques.

On this link you will find the paper. If you (or your institution) do not have access to the journal, please feel free to write me.