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Copper-doped lattice strain quantum dots and preparation method thereof

A lattice strain, quantum dot technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of large particle size quantum dots that are not very practical, and the fluorescence emission wavelength can be adjusted to a small extent. To achieve the effect of simple method, good monodispersity and good reproducibility

Active Publication Date: 2015-03-25
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The existing quantum dot energy band adjustment often uses alloy ratio, core-shell structure, transition metal element doping, or lattice strain, and the adjustable range of fluorescence emission wavelength is not large or the particle size is relatively strong. , and in the practical application of biological imaging, quantum dots with large particle size are not very practical

Method used

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  • Copper-doped lattice strain quantum dots and preparation method thereof
  • Copper-doped lattice strain quantum dots and preparation method thereof
  • Copper-doped lattice strain quantum dots and preparation method thereof

Examples

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Embodiment 1

[0029] In this embodiment, a method for preparing copper-doped lattice-strained quantum dots comprises the following steps:

[0030] (1) Precursor stock solution A: Weigh 0.183g of anhydrous cadmium chloride and dissolve it in 10ml of ultrapure water;

[0031] (2) Precursor stock solution B: Weigh 0.183g of anhydrous zinc acetate and dissolve it in 10ml of ultrapure water;

[0032] (3) Precursor stock solution C: Weigh 0.175g of copper chloride dihydrate and dissolve in 10ml of ultrapure water;

[0033] (4) Precursor stock solution D: Weigh 0.123g of reduced glutathione and dissolve it in 10ml of ultrapure water;

[0034] (5) Take 0.4ml of precursor stock solution A, add 0.6ml of precursor stock solution B correspondingly, add 0.01ml of precursor stock solution C, 5ml of precursor stock solution D, and dilute to 100ml (anhydrous cadmium chloride, The molar ratio of anhydrous zinc acetate, copper chloride dihydrate and glutathione is 1:1.5:0.025:5);

[0035] (6) Adjust the p...

Embodiment 2

[0040] In this embodiment, a method for preparing copper-doped lattice-strained quantum dots comprises the following steps:

[0041] (1) Precursor stock solution A: Weigh 0.183g of anhydrous cadmium chloride and dissolve it in 10ml of ultrapure water;

[0042] (2) Precursor stock solution B: Weigh 0.183g of anhydrous zinc acetate and dissolve it in 10ml of ultrapure water;

[0043] (3) Precursor stock solution C: Weigh 0.175g of copper chloride dihydrate and dissolve in 10ml of ultrapure water;

[0044] (4) Precursor stock solution D: Weigh 0.123g of reduced glutathione and dissolve it in 10ml of ultrapure water;

[0045] (5) Take 0.2ml of precursor stock solution A, add 0.8ml of precursor stock solution B correspondingly, add 0.01ml of precursor stock solution C, 5ml of precursor stock solution D, and dilute to 100ml (anhydrous cadmium chloride, The molar ratio of anhydrous zinc acetate, copper chloride dihydrate and glutathione is 1:4:0.05:10);

[0046] (6) Adjust the pH ...

Embodiment 3

[0051] In this embodiment, a method for preparing copper-doped lattice-strained quantum dots comprises the following steps:

[0052] (1) Precursor stock solution A: Weigh 0.183g of anhydrous cadmium chloride and dissolve it in 10ml of ultrapure water;

[0053] (2) Precursor stock solution B: Weigh 0.183g of anhydrous zinc acetate and dissolve it in 10ml of ultrapure water;

[0054] (3) Precursor stock solution C: Weigh 0.175g of copper chloride dihydrate and dissolve in 10ml of ultrapure water;

[0055] (4) Precursor stock solution D: Weigh 0.123g of reduced glutathione and dissolve it in 10ml of ultrapure water;

[0056] (5) Take 0.2ml of precursor stock solution A, add 0.8ml of precursor stock solution B correspondingly, add 0.01ml of precursor stock solution C, 5ml of precursor stock solution D, and dilute to 100ml (anhydrous cadmium chloride, The molar ratio of anhydrous zinc acetate, copper chloride dihydrate and glutathione is 1:4:0.05:10);

[0057](6) Adjust the pH v...

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Abstract

The invention discloses copper-doped lattice strain quantum dots and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving cadmium chloride or cadmium acetate, zinc acetate or zinc chloride, cupric chloride dihydrate and glutathione in a mole ratio of 1:(1.5-4):(0.025-0.05):(5-10) in water to obtain a mixed solution, wherein the concentration of the cadmium chloride or cadmium acetate is 0.2-0.6 mmol / l; and (2) regulating the pH value of the mixed solution obtained in the step (1) to 10.5-11.5, heating the mixed solution at 93-98 DEG C to react for 30-120 minutes, and cooling to room temperature, thereby obtaining the copper-doped lattice strain quantum dots. A metal bath heating process is utilized to prepare the small-particle-size quantum dots which are adjustable from the visible light region to the near-infrared region; and thus, the method is simple and convenient, and has the advantages of mild reaction conditions, short time, favorable reproducibility, favorable monodispersity and the like.

Description

technical field [0001] The invention relates to the technical field of inorganic nanometer materials, in particular to a copper doped lattice strain quantum dot and a preparation method thereof. Background technique [0002] Quantum dots (quantum dots, QDs), also known as semiconductor nanocrystals, are nanocrystalline grains composed of II-IV or III-V elements. Quantum dots have attracted much attention due to their excellent physical and chemical properties, such as quantum size effect, luminescent properties, and chemical processability, as well as their applications in biomarkers, biosensing, optoelectronics, and solar cells. [0003] Compared with traditional organic fluorescent dyes, quantum dots have many excellent spectral properties, and have shown broad application prospects in the fields of biology and medicine, especially the near-infrared fluorescent quantum dots developed in recent years, due to their strong Penetrating power, especially suitable for in vivo n...

Claims

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Application Information

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IPC IPC(8): C09K11/58
Inventor 蔡林涛陈驰张鹏飞高笃阳
Owner SHENZHEN INST OF ADVANCED TECH
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