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Method for using amphipathy hyperbranched polymer to prepare quantum dots

An amphiphilic hyperbranched, polymer technology, applied in chemical instruments and methods, luminescent materials, etc.

Active Publication Date: 2010-03-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of quantum dots using amphiphilic hyperbranched polymers has not been reported so far

Method used

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  • Method for using amphipathy hyperbranched polymer to prepare quantum dots
  • Method for using amphipathy hyperbranched polymer to prepare quantum dots
  • Method for using amphipathy hyperbranched polymer to prepare quantum dots

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Step 1: Add 100 mg of hexadecyl chloride-terminated hyperbranched polyamidoamine into a 100 ml reaction bottle, and add 40 ml of chloroform to dissolve it to prepare an amphiphilic single-molecule nanomicelle solution.

[0026] Step 2: Add 5 ml of amphiphilic unimolecular nanomicelle solution containing 0.3×10 -5 molar Cd(AC) 2 The aqueous solution was sealed and stirred at room temperature for 48 hours, then left to stand, and the chloroform solution in the lower layer was separated into an isolation bottle.

[0027] The third step is to pass nitrogen gas into the isolation bottle for 15 minutes, and then add 2 ml containing 0.3×10 -5 Mole Na 2 S deoxygenated aqueous solution, continue to pass nitrogen for 10 minutes, and stir at room temperature for about 1 hour. A clear chloroform solution of CdS quantum dots can be obtained after static separation.

[0028] like figure 1 As shown in (a), the UV-visible spectrum of the CdS quantum dot prepared in the present emb...

Embodiment 2

[0030] Step 1: Add 100 mg of hexadecyl chloride-terminated hyperbranched polyethyleneimine to a 100 ml reaction bottle to prepare an amphiphilic unimolecular nanomicelle solution.

[0031] Step 2: Add 5 ml of amphiphilic unimolecular nanomicelle solution containing 1×10 -5 molar Cd(AC) 2 The aqueous solution was sealed and stirred at room temperature for 48 hours, then left to stand, and the chloroform solution in the lower layer was separated into an isolation bottle.

[0032] The third step is to pass nitrogen gas into the isolation bottle for 15 minutes, then add 2 ml and add 2 ml containing 1×10 -5 Mole Na 2 S deoxygenated aqueous solution, continue to pass nitrogen for 10 minutes, and stir at room temperature for about 1 hour. A clear chloroform solution of CdS quantum dots can be obtained after static separation.

[0033] The transmission electron microscope figure of the CdS quantum dot prepared in the present embodiment is as follows image 3 (a) shown. It can be...

Embodiment 3

[0035] Step 1: Add 100 mg of hexadecyl chloride-terminated hyperbranched polysulfone-amine into a 100 ml reaction bottle, and then add 40 ml of chloroform to dissolve it to prepare an amphiphilic single-molecule nanomicelle solution.

[0036] Step 2: Add 5 ml of amphiphilic unimolecular nanomicelle solution containing 6×10 -5 molar Cd(AC) 2 The aqueous solution was sealed and stirred at room temperature for 48 hours, then left to stand, and the chloroform solution in the lower layer was separated into an isolation bottle.

[0037] The third step is to pass nitrogen gas into the isolation bottle for 15 minutes, and then add 2 ml containing 6×10 -5 Mole Na 2 S deoxygenated aqueous solution, continue to pass nitrogen for 10 minutes, and stir at room temperature for about 1 hour. The chloroform solution of CdS quantum dots can be obtained by static separation.

[0038] The transmission electron microscope figure of the CdS quantum dot prepared in the present embodiment is as f...

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Abstract

A method for using amphipathy hyperbranched polymer to prepare quantum dots in the technical field of photoelectric materials includes the following steps: dissolving hyperbranched polymer in chloroform and obtaining amphipathy unimolecule nanometer micellar solution after stirring; adding cadmium precursor water solution in the amphipathy unimolecule nanometer micellar solution and obtaining lower-layer chloroform solution through separation after stirring and standing; and after conducting nitrogen protection on the lower-layer chloroform solution, adding Na2S water solution to carry out secondary nitrogen protection, stirring under normal temperature, standing and separating and obtaining chloroform solution of CdS quantum dots. The synthesized CdS quantum dots have narrower dimension distribution and better stability, integrate the advantages of hyperbranched polymer and quantum dots, benefit the adjustment of mechanical, optical and electrical performances and other performances of quantum dots, and can be used for preparing photoelectric materials and the like.

Description

technical field [0001] The invention relates to a preparation method in the technical field of photoelectric materials, in particular to a method for preparing quantum dots by using amphiphilic hyperbranched polymers. Background technique [0002] Hyperbranched polymers are a class of highly branched macromolecules with three-dimensional quasi-spherical structures. Hyperbranched polymers have good solubility, a large number of terminal functional groups and intramolecular cavities, etc. Compared with dendritic polymers, the synthetic process of hyperbranched polymers is simple and can be synthesized by one-step method. In recent years, hyperbranched polymers have been extensively studied in the fields of nano-encapsulation, supramolecular self-assembly, functional membrane materials, and preparation of nanocrystals. [0003] Hyperbranched polymer molecules have nanoscale cavities inside, so they are very suitable for use as nanoreactors to prepare inorganic nanoparticles s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56
Inventor 石云峰王瑞斌邱丰庞燕朱新远
Owner SHANGHAI JIAO TONG UNIV
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