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Multifunctional up-conversion luminescence nanocrystal and preparation method thereof

A multifunctional, nanocrystalline technology, applied in the field of material science, can solve the problems of unfavorable application and development

Inactive Publication Date: 2017-08-04
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the rare earth-doped nanocrystalline materials currently reported are mainly based on a single characteristic and application, and there are few reports on the system with two or more optical properties, which is unfavorable for its further application and development. Therefore, The development and preparation of new rare earth doped nanocrystalline materials with various properties has become a research hotspot

Method used

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  • Multifunctional up-conversion luminescence nanocrystal and preparation method thereof
  • Multifunctional up-conversion luminescence nanocrystal and preparation method thereof
  • Multifunctional up-conversion luminescence nanocrystal and preparation method thereof

Examples

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Embodiment 1

[0017] Example 1: 0.5mol% Tm 3+ / 5mol%Yb 3+ :Y 2 o 3 preparation of

[0018] Weigh Tm(NO 3 ) 3 , Yb(NO 3 ) 3 and Y(NO 3 ) 3 Each 0.5, 5 and 94.5ml of the solution was placed in a beaker and stirred evenly; then the solid combustion agent glycine was added, Tm(NO 3 ) 3 , Yb(NO 3 ) 3 and Y(NO 3 ) 3 The molar ratio of the total amount to solid glycine is 1:3; Stir on a magnetic stirrer to completely dissolve solid glycine to form a transparent mixed solution; then place the mixed solution in a constant temperature oven preheated to 90°C and heat and dry for 8 hours A clear wet gel is obtained. The obtained gel was put into a corundum crucible and transferred to a well-type furnace at 300°C. After the heat preservation, the gel appeared self-propagating combustion phenomenon, and a fluffy white precursor was obtained after the reaction. Grind the precursor and put it into a well-type furnace, heat up to 800°C at a rate of 5°C / min, calcinate for 3 hours, take it out...

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Abstract

The invention discloses a multifunctional up-conversion luminescence nanocrystal which has optical temperature sensing, laser-induced heating and thermochromic characteristics at the same time and is a cubic phase yttrium oxide spherical nanocrystal with the average diameter of 30-50nm, wherein trivalent Tm<3+> and Yb<3+> ions are codoped in the nanocrystal, the doping concentration of the Tm<3+> is 0.1-0.5mol%, the doping concentration of the Yb<3+> is 1-5mol%, and the concentration ratio of the Yb<3+> to the Tm<3+> is 10:1. 1G4(a)-3H6(477nm) and 1G4(b)-3H6(490nm) transition fluorescence intensity specific values of the Tm<3+> in the nanocrystal have good correspondence with temperature, and temperature measurement can be realized. A radiationless transition process of the Tm<3+> can be regulated by changing excitation power value of a 980nm laser, and control on self-heating temperature inside the nanocrystal is realized, so that the multifunctional up-conversion luminescence nanocrystal is applicable to photothermal therapy.

Description

technical field [0001] The invention relates to an up-conversion luminescent nanocrystal with temperature sensing, laser-induced heating and thermal discoloration properties, and belongs to the technical field of material science. Background technique [0002] Rare earth-doped upconversion luminescent nanocrystalline materials have broad application potential and advantages in many fields such as lighting displays, fluorescent labels, temperature sensing, and laser devices, and are constantly developing into other emerging technology fields. Among them, the optical temperature sensing technology based on rare earth ion-doped materials can realize non-contact and submicron-scale temperature detection by exploring the relationship between the fluorescence intensity ratio of the thermally coupled energy level and the temperature, and has high temperature measurement accuracy, With the advantages of not being disturbed by electromagnetic fields, it has shown great application pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C09K9/00G01K11/14
CPCC09K11/7769C09K9/00G01K11/14G01K2211/00
Inventor 雷若姗陈广润黄飞飞王焕平徐时清田颖
Owner CHINA JILIANG UNIV
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