Photo- and under X-ray luminescence from xerogels embedded in mesoporous anodic alumina

Porous anodic alumina (PAA) films with pore and cell sizes ranging from 170 to 190 and 240 to 270 nm, respectively, have been generated on aluminum and monocrystalline silicon substrates followed by spin-on sol-gel derived coating with the subsequent thermal treatment producing microporous xerogel. The distribution of the xerogels corresponding to the chemical contents of willemite, garnet, titania, alumina, doped with terbium and strontium in PAA was investigated. Most xerogels, after annealing at 1000 °C, are mainly distributed near the pore bases, leaving much of the pore volume unfilled