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X-ray spectroscopic diagnostics of the structure of quantum dots based on zinc and manganese sulfides and oxides

机译:基于锌和硫化锰和氧化物的量子点结构X射线光谱诊断

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摘要

The microwave synthesis of quantum dots (QDs) based on zinc and manganese sulfides and oxides in a water-ethanol medium is proposed. The sample synthesized is characterized by X-ray diffraction (XRD), photoluminescence, X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) spectroscopy. The XRD analysis shows the presence of the hexagonal ZnS phase of wurtzite type with an average nanocrystal size of 4.5 nm and manganese oxide Mn3O4 (hausmannite phase) with an average particle size of 12.5 nm in the sample under study, but does not provide the unambiguous conclusion about the doping of ZnS nanoparticles with Mn atoms. Although the analysis of the zinc and manganese K-edge XANES spectra suggests that the synthesized QD sample is a ZnMnS solid solution (similar to 11%), a significant amount of a by-product (manganese oxide Mn3O4 of the hausmannite phase, similar to 89%) is formed.
机译:提出了基于锌和硫化物硫化物和水 - 乙醇介质中的氧化物的量子点(QDS)的微波合成。 合成的样品的特征在于X射线衍射(XRD),光致发光,近边缘结构(Xanes)附近的X射线吸收和延伸的X射线吸收细结构(EXAFS)光谱。 XRD分析表明,在研究中,在研究中,具有4.5nm和锰氧化物Mn3O4(Hausmannite相)的平均纳米晶体尺寸的六方织物型六方ZnS相的存在,但在研究中的样品中的平均粒度为12.5nm,但不提供明确的 结论涉及Mn原子的ZnS纳米粒子的掺杂。 虽然锌和锰K缘XANES光谱的分析表明,合成的QD样品是ZnMNS固溶体(类似于11%),其大量的副产物(Hausmannite相的锰氧化物Mn3O4相似,类似于 形成89%)。

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