低毒高效磷化铟量子点的制备及其应用研究

发布时间：2018-03-31 15:05

本文选题：InP　切入点：QDs　出处：《天津理工大学》2016年硕士论文

【摘要】：磷化铟量子点(InP QDs)以其独特的光学性能及其低毒等特点而引起人们的普遍关注,在太阳能电池、发光二极管以及生物成像领域有广泛的应用。随着人们对InP QDs研究及其在光电和生物医学等领域应用推广的深入,寻求大规模生产InP QDs的合成方法迫在眉睫。在InP QDs的应用方面,基于光电器件的要求,将QDs嵌入固体基质的研究成为必要。此外,生物成像对InP QDs在生物相容性以及其细胞毒性等方面提出了较高的要求。针对以上问题,本论文的主要工作如下:(1)高发光效率的InP/ZnS QDs溶剂热法制备:通过使用简单易控的溶剂热法、对InP/ZnS QDs的合成条件进行了系统研究。通过对溶剂体积、药品剂量等实验条件的控制,合成了尺寸可调的InP QDs。通过进一步在包壳过程中各个实验条件的调节与优化,成功摸索出了溶剂热法制备高荧光量子点的合成工艺,并获得了发光效率高达50%以上的QDs。(2)InP/ZnS QDs均分散二氧化硅凝胶玻璃的制备:使用APS和MPS作为硅烷偶联剂有针对性的对不同表面性质的QDs进行表面修饰。以APS作为玻璃基质,采用溶胶凝胶法将表面修饰后的QDs嵌入玻璃基质中,成功制备出发光效率高达30%、具有良好透光性及QDs均匀分散的二氧化硅凝胶玻璃。(3)包含多个QDs的QDs-SiO_2纳米球的制备:采用传统的“St?ber”法制备二氧化硅纳米球,通过讨论是否对QDs进行表面修饰这一过程,得出了表面修饰对于保持二氧化硅纳米球荧光性能的重要性。通过条件优化,成功制备了荧光效率高达32%的纳米球。将所得的二氧化硅纳米球应用于生物细胞成像中,取得了较好的实验结果。
[Abstract]:Indium phosphide quantum dots (InP QDs) have attracted wide attention due to their unique optical properties and low toxicity, and have been widely used in solar cells, light-emitting diodes and biometric imaging.With the development of InP QDs and its application in the fields of photoelectricity and biomedicine, it is urgent to seek the synthetic method of mass production of InP QDs.In the application of InP QDs, it is necessary to embed QDs into solid matrix according to the requirement of optoelectronic devices.In addition, bioimaging requires high biocompatibility and cytotoxicity of InP QDs.To solve the above problems, the main work of this thesis is as follows: (1) InP/ZnS QDs with high luminescence efficiency is prepared by solvothermal method. The synthesis conditions of InP/ZnS QDs are systematically studied by using a simple and easily controlled solvothermal method.InP QDs with adjustable size were synthesized by controlling the experimental conditions such as the volume of solvent and the dosage of drug.Through the adjustment and optimization of the experimental conditions in the process of cladding, the solvothermal synthesis of high fluorescence quantum dots has been successfully explored.The preparation of QDs.(2)InP/ZnS QDs dispersed silica gel glass with luminescence efficiency of more than 50% was obtained. APS and MPS were used as silane coupling agents to modify the surface of QDs with different surface properties.The surface modified QDs was embedded in the glass matrix by sol-gel method with APS as the glass substrate.The QDs-SiO_2 nanospheres with high luminescence efficiency, good transmittance and uniform dispersion of QDs were successfully prepared. The QDs-SiO_2 nanospheres containing multiple QDs were prepared by the traditional "St?ber" method, and the silicon dioxide nanospheres were prepared by the traditional "St?ber" method.By discussing the process of surface modification of QDs, the importance of surface modification in maintaining the fluorescence properties of silica nanospheres was obtained.The fluorescent efficiency of 32% nanospheres was successfully prepared by optimizing the conditions.The obtained silica nanospheres have been applied to the imaging of biological cells and good experimental results have been obtained.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB383.1;O657.3

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