Aqueous phase synthesizing method for transient metal Mn doped ZnSe quantum dot

A transition metal, quantum dot technology, applied in chemical instruments and methods, measuring devices, color/spectral property measurement, etc. Safe and easy effect

Inactive Publication Date: 2009-08-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to connect the semiconductor nanocrystals synthesized in the organic phase with biological materials, post-treatment must be carried out so that the surface of

Method used

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  • Aqueous phase synthesizing method for transient metal Mn doped ZnSe quantum dot
  • Aqueous phase synthesizing method for transient metal Mn doped ZnSe quantum dot
  • Aqueous phase synthesizing method for transient metal Mn doped ZnSe quantum dot

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Experimental program
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Embodiment 1

[0022] The preparation method of transition metal Mn-doped ZnSe quantum dots is divided into two parts: (a) the formation of transition metal Mn and Se clusters, (b) the encapsulation reaction of outer ZnSe, and the transition metal Mn-doped ZnSe quantum dots are prepared. point.

[0023] The preparation of transition metal Mn-doped ZnSe quantum dots specifically includes the following steps: (a) take 0.005g selenium powder and dissolve it in 1mL double distilled water, and add 0.005g sodium borohydride under ice-water bath conditions to make the selenium powder and The molar ratio of sodium borohydride is 1:2, and stirred for 2 hours to prepare a sodium selenium hydride stock solution for use, and its concentration is 0.0625M;

[0024] (b) Weigh 0.2473g MnCl 2 4H 2O is dissolved in 100mL double-distilled water to prepare the stock solution of the salt compound of Mn, its concentration is 0.0125M, and 0.9297g Zn(NO 3 ) 2 ·6H 2 O is dissolved in 100mL double-distilled wate...

Embodiment 2

[0031] The preparation of transition metal Mn-doped ZnSe quantum dots specifically includes the following steps: (a) take 0.005g selenium powder and dissolve it in 1mL double distilled water, add 0.005g sodium borohydride, so that the molar ratio of selenium powder and sodium borohydride 1:2, stirred for 2 hours under ice-water bath conditions, prepared sodium selenium hydride stock solution for use, and its concentration was 0.0625M;

[0032] (b) Weigh 0.2473g MnCl 2 4H 2 O is dissolved in 100mL twice distilled water and makes the stock solution of the salt compound of Mn, and its concentration is 0.0125M, takes by weighing 0.9297g Zn (NO 3 ) 2 ·6H 2 O is dissolved in 100mL twice distilled water and makes the stock solution of the salt compound of Zn, and its concentration is 0.0125M;

[0033] (c) Take 140 μL of the stock solution of the transition metal Mn salt compound and 0.4000 g of mercaptosuccinic acid, the molar ratio of mercaptosuccinic acid to Mn is 1200:1, dilut...

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Abstract

The invention belongs to the technical field of preparation of quantum dot nanometer materials, and particularly relates to an aqueous phase synthesis method for transition metal Mn doped ZnSe quantum dots. The method comprises the steps of utilizing inorganic metal water-soluble compounds such as zinc nitrate, manganese chloride and the like and carboxylic acid reagents containing sulfhydryl groups as raw materials, and doping transition metal Mn into ZnSe semi-conductor nano-particles in aqueous solution by a nucleation doping method. The method has the advantages of mild reaction conditions, simple and safe operation, and good repetitiveness, eliminates the toxicity caused by the use of heavy metal elements in the prior quantum dots, and successfully synthesizes non-toxic quantum dots emitting yellow visible light. The quantum dots can be taken as a fluorescent marker to be widely applied to cell and tissue imaging due to low toxicity, and can be applied to in vivo imaging research.

Description

technical field [0001] The invention belongs to the technical field of preparation of quantum dot nanometer materials, and in particular relates to an aqueous phase synthesis method of transition metal Mn-doped ZnSe quantum dots. Background technique [0002] Quantum dots, also known as semiconductor nanocrystals, are spherical or quasi-spherical particles, usually within 10nm in diameter. Due to the existence of quantum size effects, their photophysical and chemical properties have become one of the most active research areas at present. Traditional quantum dots are mainly composed of II-VI or III-V elements, their fluorescence can be adjusted by controlling the particle size and composition, and different fluorescence can be simultaneously excited by the same excitation light source. These unique fluorescent properties make them widely studied and used as fluorescent markers in the field of biomedical labeling. Although they have obvious advantages, their disadvantages c...

Claims

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Application Information

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IPC IPC(8): C09K11/88G01N21/64G01N21/31G01N23/207G01N24/10
Inventor 苏星光王超
Owner JILIN UNIV
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