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

A silver indium selenium and near-infrared technology, applied in the field of nanomaterials, can solve the problems of unfavorable in vivo imaging research, limited adjustable wavelength, long reaction time, etc., and achieve the effect of simple method, short reaction time and good reproducibility

Inactive Publication Date: 2015-04-15
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • 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, th

Method used

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

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] In this embodiment, a method for preparing near-infrared silver indium selenium quantum dots includes the following steps:

[0024] (1) Precursor stock solution A: Weigh 0.195g of silver nitrate and dissolve it in 10ml of ultrapure water;

[0025] (2) Precursor stock solution B: Weigh out 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 0.04g of sodium borohydride and 0.0395g of selenium powder, dissolve in 1ml of ultrapure water, and ice bath until colorless;

[0028] (5) Take 0.08ml precursor stock solution A, add 2ml precursor stock solution B, add 1.4ml precursor stock solution C, dilute to 10ml, adjust the pH to 8.5, bubbling in argon gas for deoxygenation for 30 minutes, add 0.32ml precursor stock solution D (the molar ratio of silver nitrate, indium acetate, sodiu...

Example Embodiment

[0034] Example 2

[0035] In this embodiment, a method for preparing near-infrared silver indium selenium quantum dots includes the following steps:

[0036] (1) Precursor stock solution A: Weigh 0.195g of silver nitrate and dissolve it in 10ml of ultrapure water;

[0037] (2) Precursor stock solution B: Weigh out 0.0583g of indium acetate and dissolve it in 10ml of ultrapure water;

[0038] (3) Precursor stock solution C: Weigh 0.212g of 3-mercaptopropionic acid and dissolve it in 10ml of ultrapure water;

[0039] (4) Precursor stock solution D: Weigh 0.04g of sodium borohydride and 0.0385g of selenium powder, dissolve in 1ml of ultrapure water, and ice bath until colorless;

[0040] (5) Take 0.08ml of precursor stock solution A, add 1ml of precursor stock solution B, add 1.4ml precursor stock solution C, dilute to 10ml, adjust the pH to 8.5, bubbling in argon for deoxygenation for 30 minutes, add 0.32ml precursor stock solution D (the molar ratio of silver nitrate, indium acetate, sod...

Example Embodiment

[0045] Example 3

[0046] In this embodiment, a method for preparing near-infrared silver indium selenium quantum dots includes the following steps:

[0047] (1) Precursor stock solution A: Weigh 0.195g of silver nitrate and dissolve it in 10ml of ultrapure water;

[0048] (2) Precursor stock solution B: Weigh out 0.0583g of indium acetate and dissolve it in 10ml of ultrapure water;

[0049] (3) Precursor stock solution C: Weigh 0.212g of 3-mercaptopropionic acid and dissolve it in 10ml of ultrapure water;

[0050] (4) Precursor stock solution D: Weigh 0.04g of sodium borohydride and 0.0395g of selenium powder, dissolve in 1ml of ultrapure water, and ice bath until colorless;

[0051] (5) Take 0.08ml precursor stock solution A, add 0.4ml precursor stock solution B, add 1.4ml precursor stock solution C, dilute to 10ml, adjust the pH to 8.5, bubbling in argon for deoxygenation for 30 minutes, Add 0.16ml precursor stock solution D (the molar ratio of silver nitrate, indium acetate, sodium ...

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Abstract

The invention discloses a near-infrared silver-indium-selenium quantum dot and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving cupric chloride or silver acetate, indium acetate, sodium hydrogen selenide and 3-mercaptopropionic acid according to the molar ratio of 1:1-5:10-20:34-36, so as to obtain a mixed solution, wherein the concentration of cupric chloride or silver 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 55-65 min, and cooling to room temperature, so as to obtain the near-infrared silver-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 silver 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): C09K11/88C01B19/00G01N21/64B82Y20/00B82Y40/00
Inventor 蔡林涛陈驰张鹏飞高笃阳
Owner SHENZHEN INST OF ADVANCED TECH
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