Abstract
The paper briefly reports on a contemporary view of the fractal structure of tetraethoxysilane (TEOS)- derived sol–gel synthesis products including in the presence of inorganic dopants and organic modifiers (H3PO4, polyionene, i.e., a high molecular weight quaternary ammonium compound, and epoxy resin), relying on the author’s and literature data. Morphological features of thin film surfaces and the effect of additives of inorganic salts and acids (Co(NO3)2, Al(NO3)3, H3BO3, HNO3, and HCl) thereon were analysed. The influence of spin-coating conditions (temperature and relative humidity) was also investigated, as exemplified by borosilicate “spin-on glass” films. The major components of film-forming TEOS-derived sols (TEOS and H3BO3, TEOS and epoxy-resin) were considered as morphogens. Moreover, their contribution to the formation of 2D and 3D stable spatial structures that were close to Turing patterns according to their configuration was assayed. An opportunity of formation of triply periodic minimal surfaces in thin-layer structures in the result of self-organization of viscous epoxy-siloxane sols has been discussed.
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