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Invisible skin marker based on rare earth upconversion material

A rare earth up-conversion and marker technology, which is applied in luminescent materials, identification devices, instruments, etc., can solve the problems that the fluorescent color of the marker is easily disturbed by the environment, difficult to mark for a long time, and does not have the concealment of marking, and achieves long-term effective marking. Recognition, tinting powerful effects

Active Publication Date: 2022-05-13
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It effectively overcomes the problems that some existing markers do not have labeling concealment, are not easy to label for a long time, and the fluorescent color of the label is easily interfered by the environment.

Method used

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  • Invisible skin marker based on rare earth upconversion material
  • Invisible skin marker based on rare earth upconversion material
  • Invisible skin marker based on rare earth upconversion material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. Add 0.5M yttrium nitrate, 0.5M ytterbium nitrate and 0.2M erbium nitrate to the ethanol-oleic acid-sodium hydroxide mixed system, add 0.5M manganese chloride solution dropwise under stirring, and keep stirring until uniform, the time is For 10 minutes, add 0.4M sodium fluoride solution dropwise, stir for 10 minutes, heat water at 200°C, keep warm for 8 hours, then cool down to room temperature naturally, centrifuge and freeze-dry to obtain oil-soluble manganese, ytterbium and erbium-doped tetrafluoroyttrium NaYF 4 : Yb, Er, Mn rare earth up-conversion materials;

[0027] b. Add 300mg of oil-soluble NaYF 4 : Ultrasonic dispersion of Yb, Er, Mn rare earth up-conversion materials in 150ml dimethyl sulfoxide solvent, then slowly dropwise add polyethyleneimine solution with a molecular weight of 300g / mol, ultrasonically disperse, heat and reflux for 8 hours, and dissolve in absolute ethanol , Centrifugal cleaning with deionized water, freeze-drying to obtain NaYF modifi...

Embodiment 2

[0032] a. Add 0.5M yttrium nitrate, 0.5M ytterbium nitrate and 0.2M erbium nitrate to the ethanol-oleic acid-sodium hydroxide mixed system, add 0.5M manganese chloride solution dropwise under stirring, and keep stirring until uniform, the time is For 20 minutes, add 0.4M sodium fluoride solution dropwise, stir for 15 minutes, heat water at 200°C, keep warm for 8 hours, then cool down to room temperature naturally, centrifuge and freeze-dry to obtain oil-soluble manganese, ytterbium and erbium-doped tetrafluoroyttrium NaYF 4 : Yb, Er, Mn rare earth up-conversion materials;

[0033] b. Add 300mg of oil-soluble NaYF 4: Yb, Er, Mn rare earth up-conversion materials are ultrasonically dispersed in 150ml of dimethyl sulfoxide solvent, and then slowly dropwise added polyethyleneimine solution with a molecular weight of 10000g / mol, ultrasonically dispersed, heated to reflux for 8 hours, and anhydrous Ethanol and deionized water were centrifuged and washed, freeze-dried to obtain pol...

Embodiment 3

[0038] a. Add 0.5M yttrium nitrate, 0.5M ytterbium nitrate and 0.2M erbium nitrate to the ethanol-oleic acid-sodium hydroxide mixed system, add 0.5M manganese chloride solution dropwise under stirring, and keep stirring until uniform, the time is 10-30min, add dropwise 0.4M sodium fluoride solution, stir for 20min, heat the water at 200°C, keep warm for 8 hours, then cool down to room temperature naturally, centrifuge and freeze-dry to obtain oil-soluble manganese, ytterbium and erbium-doped tetrachloride Sodium yttrium fluoride NaYF 4 : Yb, Er, Mn rare earth up-conversion materials;

[0039] b. Add 300mg of oil-soluble NaYF 4 : Yb, Er, Mn rare earth up-conversion materials were ultrasonically dispersed in 150ml of dimethyl sulfoxide solvent, then slowly added dropwise the 0th generation polyamide-amine solution, ultrasonically dispersed, heated and refluxed for 8 hours, washed with absolute ethanol, Centrifugal cleaning with deionized water, freeze-drying to obtain the 0th ...

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Abstract

The invention relates to an invisible skin marker based on a rare earth up-conversion material, the marker is mainly prepared from an amine polymer modified manganese, ytterbium and erbium doped sodium yttrium tetrafluoride (NaYF4: Yb, Er, Mn) rare earth up-conversion material and a solvent, when the marker is coated or sprayed on the surface of the skin of a specific target, the marker is invisible under visible light, and the marker can be applied to the skin of the specific target. Manual removal of the marker can be avoided; and the marker displays strong fluorescence under near-infrared exciting light, has good anti-interference performance and washing resistance, and can provide a basis for identifying and recognizing suspects. The problems that part of existing markers do not have mark concealment and are not easy to mark for a long time, and the mark fluorescence color is easily interfered by the environment are effectively solved. The marker provided by the invention has good stability, anti-interference performance and relatively strong washing resistance.

Description

technical field [0001] The invention relates to an invisible skin marker based on a rare earth up-conversion material, which is colorless under visible light, but bright red under near-infrared excitation light, and has good resistance to various living substances and fluorescent materials. Interference, and has strong washing resistance. Background technique [0002] Invisible strong labeling technology is mainly based on invisible strong markers that have no color under visible light, but show special fluorescent colors under special light excitation. At present, there are few literature reports on strong markers, most of which are US patents, indicating that the US has taken the lead in this field. [0003] U.S. Patent U 4219438 reports a fluorescent material that can mark equipment and clothes through trees, shrubs, etc. It is colorless under visible light and exhibits fluorescence when excited by ultraviolet light. However, benzene compounds are used, which are highly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02G09F3/02
CPCC09K11/025C09K11/7773G09F3/0294
Inventor 祖佰祎钟良根窦新存朱晓丹
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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