Cerium Phosphate Nanotubes: Synthesis, Valence State, and Optical Properties

摘要

Metal phosphates are widely utilized in nonlinear optical materials, phosphors, sensors, heat-resistant, and biocompatible materials. A particular emphasis has been placed on the study of rare-earth or rare-earth-doped phosphate materials for applications in photonic devices.[1] This interest is primarily attributed to the position of the 4f electrons, which are well shielded from the effects of the neighboring ions. Such shielding leads to discrete and well-defined energy level schemes, as well as to rather weak coupling between the electronic and vibrational wave functions. The specific luminescence with a characteristic long lifetime originates from the f-f emissions. However, at present, the progress with regard to new luminescent materials is chiefly focussed on short emission wavelengths, which are useful for imaging, lithography, and optical data recording.