Method for in situ rapidly synthesizing rare-earth doping oxide monocrystals

Abstract

The invention discloses a method for in site rapidly synthesizing rare-earth doping oxide monocrystals. By utilizing the heat effect of the precious metal nano structure plasmon, and by adopting the small-size precious metal nano particles with large absorption sectional area as a heat source, and by virtue of the effect of an external light field of the resonant wavelength, the previous metal nano particles produce extremely high heat in a short time, the heat is transferred to a rare-earth doping luminescent material, so that the local temperature of the rare-earth doping luminescent material is instantaneously increased; and meanwhile, the oxygen molecules absorbed on the surface is catalyzed by virtue of thermal electrons generated by the relaxation of the surface Plasmon, the oxygen molecules are activated, so that the luminescent material is promoted to have oxidization reaction, and under the double effect of the instantaneous high temperature and activated oxygen, the luminescent material is instantaneously changed to the rare-earth doping oxide monocrystal. By adjusting the position of a resonant hump of the precious metal particle Plasmon, the linear adjustment of the exciting light wavelength can be realized. The method is simple, easy, capable of being performed under a room temperature condition, short in reaction time and small in exciting light power density andhas wavelength dependence characteristics.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth ion-doped inorganic luminescent materials, and in particular relates to a method for rapidly synthesizing rare earth-doped oxide single-crystal nanoparticles in situ. Background technique [0002] Rare earth-doped luminescent materials are mainly composed of rare earth doped ions and host materials as activators. The luminescence process is that the host lattice absorbs external excitation energy, then transfers it to the activator, and finally the activator releases the excitation energy to produce luminescence. . It can be seen that the host material has an important influence on the rare earth luminescent material. At present, the commonly used matrix materials mainly include oxides, fluorides, phosphates and borates. Y 2 o 3 It is one of the most common oxide matrix materials with low phonon energy (430-550cm -1 ), which helps to reduce the non-radiative transition proba...

AI Technical Summary

Problems solved by technology

However, this method is complicated to operate, pollutes the environment, and the prepared samples have no regular shape and uneven particle size.

[0004] In summary, the existing rare earth oxides (such as Y 2 o 3 ) preparation methods need to be carried out under high temperature conditions, the reaction time is long, the energy conversion efficiency is low, and most of the products have irregular shapes and poor dispersion, which greatly limits their application in the fields of biology and medicine.

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