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Method for preparing monodisperse near-infrared quantum dots

A quantum dot and near-infrared technology, applied in the field of material chemistry, can solve the problems of quantum dot size uniformity, poor crystallinity stability, and limit practical applications, and achieve the effect of easy reaction scale, uniform and adjustable size, and enlarged reaction scale

Active Publication Date: 2010-08-18
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

Due to the potential biological toxicity of traditional near-infrared quantum dots, as well as the defects of quantum dots such as size uniformity, crystallinity, and poor stability, their practical applications in the fields of biomarkers, tissue and in vivo imaging, and clinical diagnosis are greatly limited.

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  • Method for preparing monodisperse near-infrared quantum dots
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  • Method for preparing monodisperse near-infrared quantum dots

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Embodiment Construction

[0019] In order to adapt to the development of molecular biology, medical diagnostics and other disciplines, people have intensified research on the application of quantum dot fluorescence imaging technology in the field of biomedicine, especially near-infrared quantum dot fluorescence imaging technology has been used in the field of biological imaging. Shows great potential. Therefore, the present invention designs and proposes a method for preparing monodisperse near-infrared quantum dots, aiming at many defects of existing common near-infrared quantum dots. In general: this method uses diethyldithiocarbamate as the single-source reaction precursor of quantum dots, and undergoes thermal decomposition, nucleation, growth and In the process of surface functionalization, a kind of near-infrared quantum dots with monodispersity in polar solvents is finally prepared.

[0020] In terms of specific steps: firstly, the reaction precursor diethyldithiocarbamate was dissolved in a mi...

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Abstract

The invention discloses a method for preparing monodisperse near-infrared quantum dots, comprising the following steps: using diethyl dithiocarbamate as a monophyletic reaction precursor; carrying out pyrolytic reaction in mixed solution of surface active agent with high boiling point and different coordination properties and selecting silver sulfide as the target product to be prepared to obtainquantum dots with excellent dispersibility, low toxicity and near-infrared emitted light property. The method of the invention features in mild reaction conditions, simple operation, safety and good repeatability, eliminates toxicity caused by using the traditional quantum dots and provides necessary and provides necessary preparations for studies of application of the quantum dots as a fluorescence label indicator to a near-infrared biomarker and to the image formation field.

Description

technical field [0001] The invention relates to a method for preparing low-density monodisperse quantum dots with near-infrared emission properties, belonging to the technical field of material chemistry. Background technique [0002] With the development of molecular biology, medical diagnostics and other disciplines and the application of various fluorescent labeling and detection technologies, quantum dot fluorescence imaging technology has developed rapidly in the field of biomedicine. Among them, near-infrared quantum dot fluorescence imaging technology has shown great potential in the field of biological imaging. Compared with visible light quantum dots, near-infrared quantum dots have unique advantages, such as greater tissue penetration depth, and can overcome the defect that visible light quantum dots are susceptible to interference when performing deep tissue imaging. Therefore, in molecular biology, cell biology and medical diagnostics have attracted widespread a...

Claims

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Application Information

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IPC IPC(8): C09K11/58
Inventor 王强斌杜亚平
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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