Method for increasing energy transfer efficiency of rare earth ion-nano material

A technology of nanomaterials and rare earth ions, which is applied in luminescent materials, analytical materials, nanotechnology, etc., and can solve problems such as low energy transfer rate and energy loss

Pending Publication Date: 2020-03-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One aspect of the present invention is to provide a method for improving the energy transfer efficiency of rare earth ions-nanomaterials, and one purpose is to effectively solve the problem that the energy transfer rate of existing low-doped rare earth ions-nanomaterials is relatively

Method used

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  • Method for increasing energy transfer efficiency of rare earth ion-nano material
  • Method for increasing energy transfer efficiency of rare earth ion-nano material
  • Method for increasing energy transfer efficiency of rare earth ion-nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1: Construct a model of high-concentration doping of active ions to achieve effective energy transfer.

[0078] In this embodiment, through the efficient rare earth ion (Tb 3+ ) and common rare earth ions (Er 3+ ) energy level structure, and combined with the corresponding model for calculation and analysis, a model for high-concentration doping of active ions to achieve effective energy transfer was constructed, which proved that the use of high-efficiency rare earth ion doping can overcome energy cross relaxation The distance between the rare earth ions can be reduced by reducing the impurity concentration, which can accelerate the energy transfer through the excited state of the activated ions, and finally output the energy efficiently.

[0079] Such as figure 1 As shown in (a), first test the absorption spectrum of common solvents, such as methanol, ethanol, water, and cyclohexane. The absorption of solvents usually comes from the vibration of solvent func...

Embodiment 2

[0083] Example 2, in methanol solution, up-conversion nuclear nanoparticles NaY 0.35 Yb 0.6 f 4 :Tb 0.05 Preparation of BDP-loaded TMR materials and exploration of efficient energy transfer.

[0084] In a three-necked flask containing a magnetic stirrer, add 1.2mL Yb(CH 3 COO) 3 , 0.1mL Tb(CH 3 COO) 3 , 0.7mL Y(CH 3 COO) 3 Aqueous solution, 3mL oleic acid, 7mL octadecene, heated to 125 degrees Celsius in an oil bath to remove moisture in the reaction system; heated to 150 degrees Celsius, and kept for 1h; cooled to 50 degrees Celsius, moved the reaction system to a heating mantle, and Add 2mL of 0.5M methanolic NaOH solution and 4mL of 0.4M NH 4 F methanol solution, keep warm for 30min; then slowly heat up to 110 degrees Celsius to remove methanol and water; connect a vacuum pump, vacuum at 110 degrees Celsius to further remove water and air in the solution, continue for 10 minutes, fill with nitrogen, and then vacuum, repeat After three times, the temperature was ra...

Embodiment 3

[0087] Example 3: Up-conversion core-shell nanoparticles NaYb in methanol solution0.6 f 4 :Tb 0.4 @NaTbF 4 Preparation of BDP-loaded TMR materials and exploration of efficient energy transfer.

[0088] The precursor of shell-NaTbF was first synthesized 4 : Add 6.34mL oleic acid, 6.58mL oleylamine, 12.78mL octadecene and 10mL 0.2M Tb(CF 3 COO) 3 solution and 0.2720g of CF 3 COONa, the mixed solution oil bath was heated to 110 degrees centigrade to remove the moisture in the reaction system; the reaction system was moved to a heating mantle, heated to 120 degrees centigrade, and connected to a vacuum pump for evacuation for 45 minutes; turn off the vacuum pump and switch to nitrogen filling, Raise the temperature to 300 degrees Celsius, observe the reaction system, and continue to react for 5 minutes after it becomes turbid; stop heating, keep filling with nitrogen, and cool naturally to room temperature. Add ethanol to the reaction solution to precipitate the product, and...

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Abstract

The invention provides a method for realizing high-efficiency energy transfer by highly doping rare earth ions in nanoparticles. According to the method, high-efficiency rare earth ions are adopted for doping, and energy cross relaxation is overcome; the distance between activated ions is reduced by increasing the doping concentration, and acceleration energy is transmitted through the excited state energy level of the rare earth ions to reach the surface of a nano material; the high-efficiency rare earth ions are rare earth ions of which the interval between the first excited state energy level and the ground state energy level is greater than or equal to 1.4 eV. Under the irradiation of exciting light on the composite material, in the highly-doped nanoparticles, the distance of the rareearth ions is shortened, and energy is quickly transferred through the excited state energy level of the rare earth ions, effectively reaches the surfaces of the rare earth upconversion nanoparticlesand is received and utilized by loaded receptors, so that the rare earth upconversion nanoparticles are applied to the fields of biological detection and the like.

Description

technical field [0001] The invention relates to a method for realizing high-efficiency energy transfer by highly doping rare earth ions in nanomaterials. The method is especially suitable for up-conversion systems, and especially involves combining highly doped nanoparticles with acceptor small molecules to realize energy transfer from nanoparticles to Efficient delivery of small molecules. Background technique [0002] The delivery of nanomaterials as energy donors has gained extensive research attention in recent years. For example, semiconductor quantum dots are used in the research of energy transfer. After specific connection, they can be used for biological labeling and detection; energy transfer of perovskite nanocrystals can be used for the preparation of solar cells and LED devices. However, in the application in the biological field, these materials have certain biological toxicity and instability, and the excitation light is mostly ultraviolet and visible light, ...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/85G01N21/64B82Y30/00
CPCB82Y30/00C09K11/02C09K11/7773C09K11/7791G01N21/6428
Inventor 邓人仁周剑郑冰珠
Owner ZHEJIANG UNIV
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