Controllable synthesis and formation mechanism of luminescent monodispersed NaEuF₄submicron disks through assembled nanocrystals

Abstract

Monodispersed NaEuF 4 submicron disks assembled from nanocrystals exhibit prominent red emission under the excitation of UV light, low-voltage electron beam, and commercial blue light-emitting diode. These disks would have potential applications in solid-state lighting, field emission displays, etc.

Multi-color luminescence of uniform CdWO4nanorods through Eu3+ion doping

“…It is known that the relative intensities of the 5 D 0 -7 F 1 and 5 D 0 -7 F 2 emissions are very sensitive to the detailed nature of the ligand environment. 31,32 On a site without inversion symmetry, the 5 D 0 -7 F 2 electric dipole transition is the strongest. The electric dipole transition is allowed only under the condition that the Eu 3+ ion occupies a site without an inversion centre.…”

Down- and up-conversion photoluminescence, cathodoluminescence and paramagnetic properties of NaGdF4 : Yb3+,Er3+ submicron disks assembled from primary nanocrystals

“…that makes primary particles assemble into polydispersed submicron disks. 29,53,54 The effect of annealing temperature on the phase structure and morphology was investigated. When the as-prepared NaGdF 4 : Yb 3+ ,Er 3+ submicron disks were annealed at different temperatures (500, 600 and 700 C), the hexagonal structure of the submicron disks was changed, while the morphology of these submicron disks was mainly preserved.…”

Hydrothermal synthesis of 3D-hierarchical hemoglobin-like LiMnPO4 microspheres as cathode materials for lithium ion batteries

“…In the present case, the formation of the LiMnPO 4 microspheres may be attributed to the effect of citric acid. The citric acid as an important biological ligand for metal ions possesses three carboxylic acid groups and one hydroxyl functional group, which can provide chelating ability and selectively bind to specific crystallographic facets [20]. First, the citric acid reacts with the Mn 2+ ions to form citrate complexes in aqueous solution.…”