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A kind of magnetic quantum dot and its preparation method, ink cartridge

A technology of quantum dots and quantum dot layers, applied in the field of quantum dots, can solve the problems of non-magnetic ink and difficult adjustment of ink components, and achieve the effect of improving printing efficiency and

Active Publication Date: 2022-04-01
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a magnetic quantum dot and its preparation method, and an ink cartridge, aiming to solve the problem that the ink in the ink cartridge does not have Magnetism, the problem that the ink composition is not easy to adjust

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  • A kind of magnetic quantum dot and its preparation method, ink cartridge
  • A kind of magnetic quantum dot and its preparation method, ink cartridge
  • A kind of magnetic quantum dot and its preparation method, ink cartridge

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preparation example Construction

[0037] The present invention also provides a method for preparing magnetic quantum dots, comprising the steps of:

[0038]adding quantum dots and magnetic nanoparticles to an aqueous solution containing a surfactant, mixing to coat the quantum dots on the outer surface of the magnetic nanoparticle core, and obtaining a micellar solution in which the quantum dot layer coats the magnetic nanoparticle core;

[0039] Mixing the micelle solution in which the quantum dot layer coats the magnetic nano particle core with the organic shell material, so that the organic shell material is coated on the outer surface of the quantum dot layer to obtain the magnetic quantum dot.

[0040] The magnetic quantum dots prepared by the method of the present invention use magnetic nanoparticles as the core and coat a layer of quantum dots outside the core, which neither affects the performance of the quantum dots, but also makes the quantum dots magnetic. The dot layer is coated with an organic lay...

Embodiment 1

[0049] Containing 4mg red CdSe-CdS core-shell quantum dots and 6mg nanometer superparamagnetic nano-ferric oxide (MNP) (quantum dots, magnetic nanoparticles combined with organic ligands, such as Figure 2a As shown, 1 represents CdSe-CdS core-shell quantum dots, 2 represents magnetic nanoparticles, 3 represents organic ligands) in 1ml chloroform solution into 1ml dodecyltrimethylammonium bromide (DTAB) aqueous solution (20mg / ml in ultrapure water), (QDs and MNPs modified, such as Figure 2b shown, 4 means DTAB). The solution was mixed thoroughly by vortexing for 5 sec. Chloroform was removed from the mixture by blowing Ar at room temperature, and the red CdSe-CdS core-shell quantum dots were combined with nano-superparamagnetic nano-Fe3O4 through the action of solvent-repelling (dodecyltrimethylammonium bromide). Together, a clear red CdSe-CdS core-shell quantum dot and nano-superparamagnetic nano-ferric oxide aqueous micellar solution (red CdSe-CdS core-shell quantum dots ...

Embodiment 2

[0053] Inject 1ml of chloroform solution containing 4mg of red CdSe-CdS core-shell quantum dots and 6mg of nano-superparamagnetic nano-iron tetroxide (MNP) into 1ml of dodecyltrimethylammonium bromide (DTAB) aqueous solution (20mg / ml in in ultrapure water). The solution was mixed thoroughly by vortexing for 5 sec. Chloroform was removed from the mixture by blowing Ar at room temperature, and the red CdSe-CdS core-shell quantum dots were combined with nano-superparamagnetic nano-Fe3O4 through the action of solvent-repelling (dodecyltrimethylammonium bromide). Together, a clear red CdSe-CdS core-shell quantum dot and nano-superparamagnetic nano-Fe3O4 micellar aqueous solution was obtained.

[0054] The micellar solution was quickly injected into 5ml polyvinylpyrrolidone (PVP) ethylene glycol (EG) solution at room temperature at a stirring speed of 800rpm and stirred for 30 minutes, and the obtained magnetically doped Red quantum dot supernanoparticles.

[0055] The magnetical...

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Abstract

The invention discloses a magnetic quantum dot, a preparation method thereof and an ink cartridge. The quantum dots are magnetically doped to make them magnetic. Then prepare magnetic quantum dots into inks of different colors according to actual needs, and the obtained inks also have certain magnetic properties, which are mixed with ordinary inks and injected into the ink cartridge provided by the present invention, and are set in the ink cartridge through control The intensity of the electromagnetic field at the nozzle controls the content of the magnetic ink in the discharged ink, adjusts the composition of the discharged ink, and effectively improves the printing efficiency and the utilization rate of the ink cartridge.

Description

technical field [0001] The invention relates to the technical field of quantum dots, in particular to a magnetic quantum dot, a preparation method thereof, and an ink cartridge. Background technique [0002] Quantum dots are a special material that is confined to the order of nanometers in three dimensions. This remarkable quantum confinement effect makes quantum dots have many unique nanometer properties: continuously adjustable emission wavelength, narrow emission wavelength, Broad absorption spectrum, high luminous intensity, long fluorescence lifetime and good biocompatibility, etc. These characteristics make quantum dots have broad application prospects in biomarkers, flat panel displays, solid-state lighting, photovoltaic solar energy and other fields. [0003] At present, in the field of display, the functional layers of light-emitting elements can be prepared by inkjet printing, evaporation and other methods. The inkjet printing method has become a One of the commo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/38B41J2/175
CPCC09D11/38B41J2/175C09K11/88B41J2/06C09K11/74C09K11/54
Inventor 罗植天向超宇张滔朱佩
Owner TCL CORPORATION