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Preparation method of cadmium selenide nano-cluster

A nano-cluster, cadmium selenide technology, applied in the field of preparation of cadmium selenide nano-clusters

Inactive Publication Date: 2006-11-29
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, to date, no synthesis of these nanoclusters has been reported

Method used

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  • Preparation method of cadmium selenide nano-cluster

Examples

Experimental program
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Effect test

Embodiment 1

[0010] Under argon protection and stirring, add 42ml of twice-distilled water to the three-necked flask, and add 4ml of it at a concentration of 0.04mol.l -1 CdCl 2 solution (0.16mmol) and 100mg trisodium citrate dihydrate (0.34mmol), heated to 100°C and injected into 4ml with a concentration of 0.01mol.l -1 Na 2 SeSO 3 (0.04mmol) solution and start timing, and stop heating after reacting for 15min to obtain the CdSe nanoclusters protected by sodium citrate with an average particle diameter of 17nm.

Embodiment 2

[0012] Under argon protection and stirring, add 42ml of twice-distilled water to the three-necked flask, and add 4ml of it at a concentration of 0.04mol.l -1 CdCl 2 solution (0.16mmol) and 100mg trisodium citrate dihydrate (0.34mmol), heated to 100°C and injected into 4ml with a concentration of 0.01mol.l -1 Na 2 SeSO 3 (0.04mmol) solution and start timing, and stop heating after reacting for 40min to obtain the CdSe nanoclusters protected by sodium citrate with an average particle diameter of 22nm.

Embodiment 3

[0014] Under argon protection and stirring, add 42ml of twice-distilled water to the three-necked flask, and add 4ml of it at a concentration of 0.04mol.l -1 CdCl 2 solution (0.16mmol) and 100mg trisodium citrate dihydrate (0.34mmol), heated to 100°C and injected into 4ml with a concentration of 0.01mol.l -1 Na 2 SeSO 3 (0.04mmol) solution and start timing, and stop heating after reacting for 120min to obtain the CdSe nanoclusters protected by sodium citrate with an average particle diameter of 25nm.

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Abstract

A process for preparing the cadmium selenide nanolumps able to be used as monoelectron device includes such steps as filling distilled water into a three-opening reactor twice under the protection of Ar gas while stirring, proportionally adding CdCl2 solution and bihydrated trisodium citrate, heating, adding Na2SeSO3 solution, and reacting for 15-120 min.

Description

technical field [0001] The invention relates to a preparation method of cadmium selenide nanogroups. Background technique [0002] The optical and electrical properties of semiconductor nanocrystals can be adjusted by changing their physical dimensions, and can produce emitted light with high color purity. They have shown bright application prospects in optoelectronic devices and bioluminescent labels. In the past two decades, scientists have developed and mastered the method of synthesizing high-quality semiconductor nanocrystals, and prepared nanocrystals with narrow size distribution and high fluorescence quantum yield. The experimental results indicate that the fluorescence quantum yield of nanocrystals has a great relationship with the surface properties of nanocrystals. Due to the large specific surface area of ​​nanocrystals, the surface bond state and electronic energy state are different from those inside the particle. If there are a large number of uncoordinated d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G11/00
Inventor 汪尔康包海峰黄利坚
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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