CuInS_2/ZnS量子点的微波水热合成与表征——推荐一个研究型综合实验

介绍一个研究型综合实验——简易微波水热合成CuInS_2/ZnS复合量子点及其表征。实验通过Cu~(2+)、In~(3+)、Zn~(2+)和S~(2-)离子为原料,以谷胱甘肽作为稳定剂,两步微波水热合成水溶性的CuInS_2/ZnS复合量子点。用X射线衍射法和透射电镜表征它的结构和形貌,用紫外-可见光吸收、荧光光谱、荧光寿命和荧光照片等表征光学性质,并探究温度、时间、成份对荧光性质的影响。通过该实验的设计与实施培养学生科学研究的方法和思维能力。

CulnS2/ZnS Quantum Dots

A research-type comprehensive experiment was introduced:a facile microwavehydrothermal synthesis and characterization of CuInS₂/ZnS composite quantum dots (QDs). In the experiment, water-soluble CuInS₂/ZnS composite QDs were synthesized by a two-step microwavehydrothermal method using reagents of Cu²⁺, In³⁺, Zn²⁺ and S^2- with glutathione as the stabilizer. The structure of the prepared composite QDs was characterized by X-ray diffraction (XRD) and transmittance electronic microscopy (TEM), and optical properties were characterized by UV-Visible absorption spectroscopy, photoluminescence spectroscopy, fluorescence lifetime and fluorescence imaging. The effects of temperature, time and the component in the precursors on the fluorescent properties were explored. Scientific research methods and thinking ability of students are trained by designing and accomplishing the experiment.