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A preparing method of an ultra small near infrared copper indium selenium quantum dot

A copper indium selenide and quantum dot technology, which is applied in chemical instruments and methods, nanotechnology, nano optics and other directions, can solve problems such as poor reaction controllability, and achieve the effects of improved controllability, uniform size, and improved optical stability.

Inactive Publication Date: 2016-08-31
上海双洳生物科技有限公司
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Problems solved by technology

As a low-toxic near-infrared quantum dot, the CuInSe quantum dot obtained by the current method has a large size and a wide size distribution, and the reaction controllability is poor.

Method used

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  • A preparing method of an ultra small near infrared copper indium selenium quantum dot
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  • A preparing method of an ultra small near infrared copper indium selenium quantum dot

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Embodiment Construction

[0033] Such as Figure 1-5 As shown, the preparation method of the ultra-small near-infrared copper indium selenide quantum dot described in the embodiment of the present invention consists of the following steps:

[0034] (1) First, 10 milligrams of cuprous chloride, 22 milligrams of indium chloride and 25 milligrams of selenourea are placed in a 25 milliliter three-neck reaction flask, and 2.5 milliliters of octadecene and 1 milliliter of trioctylphosphine are added;

[0035] (2) After the above mixture was sonicated for 30 minutes, 1 ml of oleylamine and 0.5 ml of dodecyl mercaptan were successively added, and the resulting reaction solution was carefully dehydrated and deoxygenated and then heated to 50-60°C. After stirring, a colorless and transparent reaction was obtained. liquid;

[0036] (3) Cool the colorless and transparent reaction solution to room temperature and then heat it to 200°C. It can be seen that the color of the reaction solution gradually changes from c...

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Abstract

The invention relates to a preparing method of an ultra small near infrared copper indium selenium quantum dot. The method includes firstly preparing nanometer particle nucleuses having a uniform size. A synthetic process includes forming an organic metal compound from copper and indium chlorides and trioctylphosphine / dodecyl amine, stirring at 50-60 DEG C to obtain a colorless uniform mixed solution, and reacting at 200 DEG C so that the organic metal monomer quickly reacts to produce nanometer particles, wherein the color of the reactants changes gradually, lauryl mercaptan in the reaction solution can stabilize the produced nanometer particles, the low reaction temperature improves controllability of a nucleation reaction, and optical stability of the nanometer particles is improved. The method is simple and controllable. The size of the ultra small near infrared copper indium selenium quantum dot is about 2 nm. Water-soluble nanometer particles prepared after functionalization with a polydentate polymer ligand are high in stability and high in fluorescence quantum efficiency. The luminescence spectrum of the quantum dot covers the near infrared zone from 650 nm to 800 nm. The quantum dot can be used for a plurality of kinds of bioluminescence labeling.

Description

technical field [0001] The invention relates to biomarker fluorescent nanoparticle material technology, in particular to a preparation method of ultra-small near-infrared copper indium selenium quantum dots. Background technique [0002] Quantum dots, also known as semiconductor nanocrystals, are nanocrystalline grains composed of II-IV or II-IV 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 The penetrating power is especially suitable for non-invasive ...

Claims

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Application Information

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IPC IPC(8): C09K11/88C09K11/02B82Y20/00B82Y40/00
CPCC09K11/881B82Y20/00B82Y40/00C09K11/025
Inventor 孙明昊严正龙马东
Owner 上海双洳生物科技有限公司
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