Dissertations, Academic (Ph.D) 3 Sol-gel science Thesis (Ph.D)-Physics 3 Spectrum analysis 2 Earth, Rare 1 Nanostructures 1 Physics 1 Raman spectroscopy 1 Rare earth dopler glasses 1 Rare earth ions 1 Sand, Glass 1 Semiconductors-Nanostructures 1 Silica gel 1 Sol-gel process 1 Ultraviolet spectroscopy 1 X-rays-Diffraction 1