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Raman spectroscopic study of ZnO/NiO nanocomposites based on spatial correlation model

机译:基于空间相关模型的ZnO / NiO纳米复合材料的拉曼光谱研究

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The effect of nickel concentration has been investigated in ZnO/NiO nanocomposites synthesized using the co-precipitation method. The X-ray diffraction and TEM measurements confirm the distinct phase of NiO in the ZnO/NiO samples. Furthermore, the Raman study shows the sharp modes at 99 cm ~(?1) and 438 cm ~(?1) corresponding to E ~((low)) _(2) , E ~((high)) _(2) of hexagonal wurtzite ZnO structure and, 1080 cm ~(?1) associated to the two-phonon (2P) mode of NiO, respectively. We also compared the effect of Ni concentration on the formation of ZnO/NiO by analyzing E ~(high) _(2) Raman mode of ZnO with the help of spatial correlation model. The correlation lengths, broadening and asymmetry ratio obtained from the fitting showed good agreement with the experimental results.
机译:在使用共沉淀法合成的ZnO / NiO纳米复合材料中,已经研究了镍浓度的影响。 X射线衍射和TEM测量证实了ZnO / NiO样品中NiO的不同相。此外,拉曼研究显示在99 cm〜(?1)和438 cm〜(?1)处的锐模,对应于E〜((低))_(2),E〜((高))_(2)六方纤锌矿型ZnO的结构和1080 cm〜(?1)分别与NiO的双声子(2P)模式有关。我们还借助空间相关模型分析了ZnO的E〜(high)_(2)拉曼模式,比较了Ni浓度对ZnO / NiO形成的影响。由拟合得到的相关长度,加宽和不对称比与实验结果吻合良好。

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