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A method for preparing quantum dots with circularly polarized luminescence

A technology of quantum dots and circular polarization, applied in luminescent materials, chemical instruments and methods, nano optics, etc., to achieve the effects of small environmental impact factors, simple process, and low cost

Active Publication Date: 2020-03-31
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, quantum dots have rarely been reported to realize circularly polarized light emission, let alone realize full-band adjustable circularly polarized light emission.

Method used

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  • A method for preparing quantum dots with circularly polarized luminescence
  • A method for preparing quantum dots with circularly polarized luminescence
  • A method for preparing quantum dots with circularly polarized luminescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a gel-loaded inorganic achiral quantum dot, the method comprising the following steps:

[0042] (1) Mix 100 μL of water with 10 μL of an aqueous solution of ZnSe / ZnS quantum dots with a maximum emission wavelength of 437 nm (concentration 20 mg / mL), add 1 mL of ethanol, and mix again to obtain a mixed solution;

[0043] (2) Mix the mixed solution obtained in step (1) with 20 mg LGAm, heat until the gel factor is completely dissolved, and cool to obtain gel-loaded inorganic achiral quantum dots.

[0044] The LGAm gelling factor was replaced by the DGAm gelling factor, and the above conditions were used to prepare the gel-supported inorganic achiral quantum dots again.

[0045] Use light with a wavelength of 360nm as the excitation wavelength to excite the above two mixed systems for CPL test. The results are shown in the attached figure 1 The maximum emission wavelength shown is 437nm, in which the L-type gelling factor obtains a positive CPL sign...

Embodiment 2

[0048] A method for preparing a gel-loaded inorganic achiral quantum dot, the method comprising the following steps:

[0049] (1) Mix 10 μL of water with 100 μL of an aqueous solution of ZnSe / ZnS quantum dots with a maximum emission wavelength of 437 nm (concentration 10 mg / mL), add 1.8 mL of ethanol, and mix again to obtain a mixed solution;

[0050] (2) Mix the mixed solution obtained in step (1) with 10 mg of LGAm, heat until the gel factor is completely dissolved, and cool to obtain gel-loaded inorganic achiral quantum dots.

[0051] The LGAm gelling factor was replaced by the DGAm gelling factor, and the above conditions were used to prepare the gel-supported inorganic achiral quantum dots again.

[0052] Use light with a wavelength of 360nm as the excitation wavelength to excite the above two mixed systems for CPL test. The results are consistent with the attached figure 1 The CPL signal shown is similar.

[0053] Wherein, the surface of the quantum dots used is modifi...

Embodiment 3

[0055] A method for preparing a gel-loaded inorganic achiral quantum dot, the method comprising the following steps:

[0056] (1) Mix 20 μL of water with 180 μL of an aqueous solution of ZnSe / ZnS quantum dots with a maximum emission wavelength of 437 nm (concentration 5 mg / mL), add 1.8 mL of ethanol, and mix again to obtain a mixed solution;

[0057] (2) Mix the mixed solution obtained in step (1) with 5 mg LGAm, heat until the gel factor is completely dissolved, and cool to obtain gel-loaded inorganic achiral quantum dots.

[0058] The LGAm gelling factor was replaced by the DGAm gelling factor, and the above conditions were used to prepare the gel-supported inorganic achiral quantum dots again.

[0059] Use light with a wavelength of 360nm as the excitation wavelength to excite the above two mixed systems for CPL test. The results are consistent with the attached figure 1 The CPL signal shown is similar.

[0060] Wherein, the surface of the quantum dots used is modified by...

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Abstract

The invention provides a preparation method of a gel-supported inorganic achiral quantum dot. The preparation method comprises the following steps: mixing water with an achiral quantum dot or aqueous solution of the achiral quantum dot, adding a solvent, and mixing again, so that mixed liquor is obtained; and mixing the obtained mixed liquor with a gel factor, heating, and cooling, so that the gel-supported inorganic achiral quantum dot is obtained. The preparation method provided by the invention has the advantages that the achiral quantum dot has circular polarization luminous property, full-wave band adjustable CPL luminescence of the achiral quantum dot is realized, and CPL luminescence containing white light emitting is realized.

Description

technical field [0001] The invention belongs to the technical field of quantum dots, relates to an inorganic achiral quantum dot, in particular to a preparation method of a gel-loaded inorganic achiral quantum dot. Background technique [0002] Light is a transverse electromagnetic wave, a ray that vibrates in all directions. Its electric field vector E and magnetic field vector H are perpendicular to each other and perpendicular to the direction of light wave propagation. Since it is mainly the electric field vector that produces photosensitivity, the electric field vector is generally used as the vibration vector of the light wave. The plane formed by the light wave's electric field vector and the direction of propagation is called the vibration plane of the light wave. If the vibration plane does not change with time, the beam of light is called plane polarized light, and its vibration plane is called the polarization plane. Plane polarized light can be decomposed into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/883Y02B20/00
Inventor 段鹏飞霍胜伟韩建雷
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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