Rare-earth doped light-emitting nano-materials preparation and fluorescence properties
Luminescent materials with long fluorescence lifetime, spectral line intensity is lower, showing linear features, which clearly showed the photo and gained a wide range of applications. Meanwhile, in the near infrared region because they have a lot of laser and optical fiber through the atmosphere, resulting in laser security, solar cells, optical communications, and other aspects of distance and access to applications. Preparation of these materials, the development of new methods and the nature of the discovery of new light not only of great theoretical research value, but also has important practical significance.
Everbeen magnets supply you the rare earth magnets such as neodymium magnets,ceramic magnets,which is the strong magnets and permanent magnets.and rubber magnets,fridge magnets,Refrigerator Magnets etc.
Xiamen Everbeen Magnet Electron Co.,Ltd. http://www.chinamagnets.biz
Add:Unit H, 4F Rihua Mansion, No. 8 Xinfeng 2nd road, Torch Hi-Tech Zone, Xiamen, China.
Tel:0086-592-5781916
Fax:0086-592-5123653
E-mail:sales@china-magnet.net
Thesis focused on "rare-earth doped light-emitting nano-materials and its fluorescence properties," launched a series of research work. By solvent and heat technology, step synthesis of a strong near-infrared upconversion luminescence of polyacrylic acid (PAA) coated YF_3: Yb ~ (3 +) / Er ~ (3 +) nanoparticles. And with SEM (scanning electron microscope), TEM (transmission electron microscopy), SAED (selected area electron diffraction), XRD (X-ray powder diffraction), FTIR (Fourier transform infrared spectroscopy), fluorescence spectroscopy and other methods its Determination of the characterization and properties. Verified by experiment upconversion luminescence mechanism. This nano-material has a strong near-infrared (N-Infrared) upconversion luminescence, biological applications for the following foundation.
Solvothermal method using the system of different doping concentration, reaction time, various surface active agents wrapped YF_3: Yb ~ (3 +) / Er ~ (3 +) nanocrystals, size, conversion fluorescence properties. And the resulting surfactant, the doping concentration and reaction time on YF_3: Yb ~ (3 +) / Er ~ (3 +) nanocrystal properties.
Oleic acid, oil amine as solvent was prepared by thermal deposition Y_2O_3: Eu3 + nanoparticles. And by TEM (transmission electron microscopy), XRD (X-ray powder diffraction), fluorescence spectroscopy and other methods were characterized and the nature of its determination. And this material under the UV lamp has a strong red light. Analysis of its application in biological foundation.
Chapter IV will be different surfactant package YF_3: Yb ~ (3 +) / Er ~ (3 +) nano-materials to be discussed in more detail. This chapter focuses on sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB), polyethylene glycol (PEG, MW = 8000) of three surfactants on the YF_3: Yb ~ (3 +) / Er ~ (3 +) the impact of nanomaterials. Changes in the amount of active agent, respectively, reaction time, NaF the amount of these conditions on the YF_3: Yb ~ (3 +) / Er ~ (3 +) nanomaterials morphology, size and fluorescence properties.
