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Au/CdSe heterostructure quantum point and its preparation method

A heterogeneous structure and quantum dot technology, applied in the field of quantum dots, can solve problems such as difficult reactions, harsh conditions, and difficulty in homogeneous large-scale preparation, and achieve the effect of easy operation and control and broad application prospects

Inactive Publication Date: 2006-12-27
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a metal Au / semiconductor CdSe heterostructure quantum dot and its preparation method, to overcome the shortcomings of harsh conditions, difficult reaction control, and difficulty in homogeneous large-scale preparation in the existing heterostructure preparation technology, and to develop A homogeneous, scalable, mild and easy-to-manipulate preparation route

Method used

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  • Au/CdSe heterostructure quantum point and its preparation method
  • Au/CdSe heterostructure quantum point and its preparation method
  • Au/CdSe heterostructure quantum point and its preparation method

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Embodiment 1

[0019] 1. Prepare oil-soluble CdSe quantum dots with an average particle size of 3.4 nm.

[0020] The method reported in "Journal of the American Chemical Society 125.12567-12575, 2003" (the method disclosed in Chinese Patent No. ZL200310111494.2 can also be used) was used to prepare oil-soluble CdSe quantum dots, only for this report The first step of preparing the oil-soluble CdSe core quantum dot step, without doing the second step of the epitaxial growth CdS shell step, the specific steps are: 2mmol of selenium powder, 0.472g of tri-n-butylphosphine (TBP) Add it to 1.37g of octadecene, heat to 100°C, cool down to room temperature after the solution turns colorless, and prepare a stock solution of selenium; 0.2mmol of CdO, 0.8mmol of stearic acid and 2g of octadecene Carbene mixed and placed in a 25ml three-necked flask, heated to 200°C, cooled to room temperature after the solution became transparent, added 1.5g of octadecylamine and 0.5g of tri-n-octylphosphine oxide (TOP...

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Abstract

The invention relates the Au / CdSe heterostructure quantum point and preparing method, comprising the following steps: extracting HAuCl4*4H2O solution with toluene solution, stewing, washing the toluene solution, adding them into dodecanethiol, stirring, and getting gold solution; mixing the toluene solution and gold solution, and stirring; purifying, and getting the product composed by Au particle whose grain size is 2.0nm and CdSe particle whose grain size is 3.4nm. The invention has the advantages of metal and semi-conductor light absorption feature and dissymmetrical structure. The product can be used in nanometer electron device, light sensor and solar battery.

Description

Technical field: [0001] The invention belongs to the technical field of quantum dots, in particular to Au / CdSe heterostructure quantum dots and a preparation method thereof. Background technique: [0002] In recent years, the research on heterostructure quantum dots has attracted more and more researchers' interest, especially the research on heterostructure quantum dots based on metal or semiconductor materials is changing rapidly, because the combination of two functional materials The all-in-one nanostructure has very novel application prospects, and it usually has the composite characteristics and mutual coupling characteristics of the two materials. Metal quantum dots have excellent electrical properties, providing a broad application horizon in nanoelectronic devices, electron transfer catalysis, etc.; semiconductor quantum dots have excellent optical properties, and have far-reaching applications in bioluminescence labeling, national defense coding, and optoelectronic...

Claims

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Application Information

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IPC IPC(8): C09K11/58
Inventor 曾杰黄健柳王晓平侯建国
Owner UNIV OF SCI & TECH OF CHINA
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