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Near-infrared copper-indium-selenium quantum dot and preparation method thereof

A copper indium selenide and near-infrared technology, which is applied in the field of nanomaterials, can solve the problems of unfavorable in vivo imaging research, limited adjustable wavelength, long reaction time, etc., and achieves the effects of simple method, short reaction time and good reproducibility.

Inactive Publication Date: 2015-04-15
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has been reported in the literature that silver sulfide quantum dots were prepared by a high-temperature organic method. Due to the high-temperature oil-phase method, the obtained quantum dots are oil-soluble and require further modification before they can be applied to biological systems; water-soluble near-infrared cadmium telluride was prepared by microwave radiation. Quantum dots, the acquisition of tellurium sources requires a long reaction time and the reaction requires an oxygen-free environment. At the same time, cadmium elements contain high toxicity; a manganese-doped zinc selenide quantum dot that emits yellow visible light was synthesized by an aqueous phase method point, but the adjustable wavelength is limited, which is not conducive to in vivo imaging research

Method used

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  • Near-infrared copper-indium-selenium quantum dot and preparation method thereof
  • Near-infrared copper-indium-selenium quantum dot and preparation method thereof
  • Near-infrared copper-indium-selenium quantum dot and preparation method thereof

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Embodiment 1

[0023] In this embodiment, a method for preparing near-infrared copper indium selenide quantum dots comprises the following steps:

[0024] (1) Precursor stock solution A: Weigh 0.175g of copper chloride and dissolve it in 10ml of ultrapure water;

[0025] (2) Precursor stock solution B: Weigh 0.0583g of indium acetate and dissolve it in 10ml of ultrapure water;

[0026] (3) Precursor stock solution C: Weigh 0.212g of 3-mercaptopropionic acid and dissolve it in 10ml of ultrapure water;

[0027] (4) Precursor stock solution D: Weigh 0.03g of sodium borohydride and 0.0158g of selenium powder, dissolve in 1ml of ultrapure water, and ice-bath until colorless;

[0028] (5) Take 0.08ml of precursor stock solution A, add 1ml of precursor stock solution B, add 1ml of precursor stock solution C, set the volume to 10ml, adjust the pH value to 8.5, pass in argon gas for deoxygenation for 30min, add 0.16 ml precursor stock solution D (the molar ratio of copper chloride, indium acetate, ...

Embodiment 2

[0034] In this embodiment, a method for preparing near-infrared copper indium selenide quantum dots comprises the following steps:

[0035] (1) Precursor stock solution A: Weigh 0.175g of copper chloride and dissolve it in 10ml of ultrapure water;

[0036] (2) Precursor stock solution B: Weigh 0.0583g of indium acetate and dissolve it in 10ml of ultrapure water;

[0037] (3) Precursor stock solution C: Weigh 0.212g of 3-mercaptopropionic acid and dissolve it in 10ml of ultrapure water;

[0038] (4) Precursor stock solution D: Weigh 0.03g of sodium borohydride and 0.0158g of selenium powder, dissolve in 1ml of ultrapure water, and ice-bath until colorless;

[0039] (5) Take 0.08ml of precursor stock solution A, add 2ml of precursor stock solution B, add 1ml of precursor stock solution C, set the volume to 10ml, adjust the pH value to 8.5, pass in argon gas for deoxygenation for 30min, add 0.32 ml precursor stock solution D (the molar ratio of copper chloride, indium acetate, ...

Embodiment 3

[0045] In this embodiment, a method for preparing near-infrared copper indium selenide quantum dots comprises the following steps:

[0046] (1) Precursor stock solution A: Weigh 0.175g of copper chloride and dissolve it in 10ml of ultrapure water;

[0047] (2) Precursor stock solution B: Weigh 0.0583g of indium acetate and dissolve it in 10ml of ultrapure water;

[0048] (3) Precursor stock solution C: Weigh 0.212g of 3-mercaptopropionic acid and dissolve it in 10ml of ultrapure water;

[0049] (4) Precursor stock solution D: Weigh 0.03g of sodium borohydride and 0.0158g of selenium powder, dissolve in 1ml of ultrapure water, and ice-bath until colorless;

[0050] (5) Take 0.08ml of precursor stock solution A, add 1ml of precursor stock solution B, add 1ml of precursor stock solution C, set the volume to 10ml, adjust the pH value to 8.5, pass in argon gas for deoxygenation for 30min, add 0.16 ml precursor stock solution D (the molar ratio of copper chloride, indium acetate, ...

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Abstract

The invention discloses a near-infrared copper-indium-selenium quantum dot and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving cupric chloride or copper acetate, indium acetate, sodium hydrogen selenide and 3-mercaptopropionic acid according to the molar ratio of 1:2.5-5:4-8:24-26, so as to obtain a mixed solution, wherein the concentration of cupric chloride or copper acetate is 0.7-0.9 mmol / L; and (2) adjusting the pH value of the mixed solution obtained in the step (1) to 8-9, then heating the mixed solution at 93-98 DEG C for reaction for 60-90 min, and cooling to room temperature, so as to obtain the near-infrared copper-indium-selenium quantum dot. The prepared quantum dot has the advantages of being nontoxic, simple in method, mild and controllable in reaction conditions, short in reaction time, good in reappearance and the like. The prepared quantum dot is widely applicable to cell and tissue imaging as a fluorescent marker, and also is applicable to in vivo imaging research.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a near-infrared copper indium selenium quantum dot and a preparation method thereof. Background technique [0002] Quantum dots (quantumdots, QDs), also known as semiconductor nanocrystals, are nanocrystals 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 reagents, quantum dots have many excellent spectral properties, showing 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 non-invasive visualiza...

Claims

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Application Information

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IPC IPC(8): C09K11/88
Inventor 蔡林涛陈驰张鹏飞高笃阳
Owner SHENZHEN INST OF ADVANCED TECH
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