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Method for synthesizing powder of cadmium selenide quanta dots capable of emitting blue light

A synthesis method and technology of cadmium selenide, applied in chemical instruments and methods, binary selenium/tellurium compounds, luminescent materials, etc., can solve the problems of complicated process, long preparation time, toxic raw materials, etc., and achieve good safety and technology. Simple, easy-to-use effects

Inactive Publication Date: 2009-11-25
SHANGHAI UNIV
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Problems solved by technology

However, there are disadvantages such as complex process, long preparation time, high temperature and high pressure, and toxic raw materials.

Method used

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  • Method for synthesizing powder of cadmium selenide quanta dots capable of emitting blue light

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Embodiment 1

[0017] The specific preparation steps of this embodiment are as follows:

[0018] a. First, take a certain amount of cadmium acetate dihydrate and disodium ethylenediamine tetraacetate (EDTA) with an electronic balance, and dissolve it in distilled water so that the molar concentration ratio of cadmium ion concentration to EDTA is 1:3. Stir and mix uniformly; Then add sodium selenite, make it and the molar concentration ratio of cadmium ion be 1: 1, stir and mix to make colorless transparent sol, then adjust the pH value to be 9 with NaOH (1mol / L) solution, Then add isopropanol as an oxidizing free radical OH·scavenger, and its addition amount is 6ml / 100ml, and then the solution is fully stirred and mixed;

[0019] b. Place the above-mentioned airtight container containing the prepared mixed solution under the electron beam irradiation produced by an electron accelerator of 2.5 MeV and 7 mA for irradiation treatment. The irradiation dose is 14, 28, 42 Mrad, and the irradiation...

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Abstract

The invention relates to a method for synthesizing powder of cadmium selenide quanta dots capable of emitting blue light, belonging to the technical field of processing nanometer inorganic compound material of semiconductor. With cadmium acetate dehydrate and sodium selenite as raw material, disodium ethylenediamintetraacetate as chelating agent, and in the aqueous solution with weak alkaline, cadmium selenide quanta dots are synthesized by being radiated by electron beams. The powder of cadmium selenide quanta dots is obtained after separating the synthesized product. The cadmium selenide powder prepared by the invention has extremely good water solubility, good monodispersity, and even size with an average particle size of three nanometers. The cadmium selenide powder emits blue light, has good fluorescence characteristics and is used for manufacturing biological fluorescence probe.

Description

technical field [0001] The invention relates to a method for synthesizing blue-light-emitting cadmium selenide quantum dot powder. The synthesized product is water-soluble blue-light-emitting cadmium selenide quantum dot powder, which belongs to the technical field of nano-inorganic compound semiconductor material manufacturing technology. Background technique [0002] Quantum dots are mainly composed of II-VI or III-V elements, which have size-dependent electrical and optical properties. It has a wide range of applications in many fields, such as light-emitting diodes (LEDs), nonlinear optical devices, solar cells, and life sciences. CdSe quantum dots are currently the most studied quantum dots because their emission wavelengths cover the entire visible light region. In the past ten years, scientists have developed a variety of methods to synthesize CdSe quantum dots. [0003] The commonly used methods for preparing CdSe quantum dots include two-phase hydrothermal interfa...

Claims

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Application Information

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IPC IPC(8): C01B19/04C09K11/88B82B3/00
Inventor 李珍刘岩岩方耀国吴明红潘登余
Owner SHANGHAI UNIV
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