Preliminary Study On The Fluorescence Properties Of Er～(3+) Ions' Complex In The Template Of Nano-porous Alumina Film

The studies on nanomaterials and nanostructure open a new road to explore the nature, the researches are in the ascendent these years. In this dissertation, the fluorescence properties of Er3+ ions in the nano-porous alumina are reported , and some aspects are performed. The porous alumina film was prepared by a two-step andoization of aluminum. Phosphoric acid and oxalic acid ,as an electrolyte, was used respectively. We had chosen optimum parameters in order to obtain ordered nanochannels .By analyzing the SEM micrographs, some results were gotten : The pore diameters increased with anodic voltage within a certain voltage range . The pore diameters increased with electrolyte concentration, but not linearly, whereas the film thickness grew with electrolyte concentration linearly. When the anodization time extended , the pore diameters decreased , while the film thickness increased , but the increase tendency was more and more slower . The complex of Er3+－Acetylacetonate was fabricated , then placed in the template of nano-porous alumina by Sol－Gel method . The nanochannels' effect on Er3+ ion's fluorescence was explored. By the RT fluorescence spectra , we found that Acetylacetonate and nanochannels didn't shift the EL peaks. Nanochannels made fluorescence peaks narrow, and some EL peaks disappeared . When the sample was annealed at 200℃ , the intensity of the RT fluorescence became very strong , especially the peak of 452nm . Because the nanocombined system is complex, the above experiments are just exploratory , and the further research is expected .