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Upconversion nano- markers for biological analysis in recent years, nanotechnology research hotspot markers . How to choose a suitable matrix material and rare earth ions to obtain high performance, high luminous efficiency and better morphology upconversion luminescence upconversion nano material is an important research direction marker . This paper seeks to obtain a suitable substrate suitable granularity , high luminous efficiency upconversion materials for the target , using different experimental methods to prepare a series of rare earth doped oxides and complex oxide materials , and study and explore their shape appearance and luminescence properties. First, the study was prepared by low temperature combustion Y2O3: Yb, Ho nanoparticle method, the system of synthesis conditions and method for dispersing nanoparticles were explored . Experimentally derived , ignition temperature can get as low as 180 ℃ pure Y203 phase , the best reaction of glycine amount G / N ( glycine nitrate ion molar ratio ) ratio of 3.5 / 9, the optimum reaction time is 60 min, the optimum reaction temperature is 220 ℃, PEG 4000 is added to improve the dispersibility of nanoparticles have a certain role . Secondly , the application of coprecipitation new composite oxide matrix SrY2O4: Yb, Er powders of different experimental conditions such as oxalic acid dosage and pH on SrY2O4: Yb, Er upconversion samples and morphology discussed SrY2O4: Yb, Er upconversion mechanism system . Again , the application of ethylene glycol solvothermal prepared In2O3: Yb, Tm/In2O3: Yb powder , a detailed study of Tm3 / Yb3 doping amount , calcination temperature, the heating temperature and other factors on In2O3: Yb, Tm samples on conversion luminescence and morphology . And found In2O3: Yb nanopowders upconversion showing special broadband upconversion emission phenomena , and the causes of this luminescence experiments were carried out research and analysis. Finally , the application of ethylene glycol assisted hydrothermal method at 200 ℃ under hydrothermal conditions without calcination get a CaTiO3/CaTiO3: Pr microcrystalline found CaTiO3 powders prepared with ethylene glycol and water used in different proportions , resulting product microstructure can be formed cube, dodecahedron , spheres and other microstructure ; analyze the formation of various possible causes of morphology . The method is simple , and the resulting product of high purity, good dispersion .
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