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首页> 外文期刊>Journal of Crystal Growth >In situ synthesis of magnetic particles on the surface of tetra-needle like ZnO whisker
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In situ synthesis of magnetic particles on the surface of tetra-needle like ZnO whisker

机译：ZnO晶须等四针表面的磁性粒子的原位合成

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摘要

Nanosized magnetic particles were synthesized in situ on the surface of tetra-needle-like ZnO whisker (ZnOw) via two steps. Firstly, the intermediate composites of polyethylene glycol (PEG), ZnOw and iron oxides were obtained through the oxidation of Fe2+ in the PEG micelles and the simultaneous adhesion of the micelles on the surface of ZnOw. Successively, the obtained semis were continuously baked in the nitrogen and hydrogen atmosphere, respectively, and ZnOw modified by magnetic particles (noted as M-ZnOw) was prepared. The as-prepared semis and M-ZnOw still kept the tetra-needle-like morphology while the magnetic particles uniformly generated on the whisker's surface, which was confirmed by the analysis of scanning electron microscopy, energy loss spectrum and X-ray diffraction. Moreover, the investigation indicated that the components of the particles formed in situ on the surface of ZnOw were influenced by the composition ratio and the experimental conditions. The investigation also suggested that PEG played a role of bridging between ZnOw and magnetic particles. Further experiments showed that M-ZnOw appeared to have good microwave absorption properties in the S-band. (c) 2005 Elsevier B.V. All rights reserved.
机译：通过两步法在四针状ZnO晶须（ZnOw）的表面上原位合成了纳米级磁性颗粒。首先，通过PEG胶束中Fe2 +的氧化以及胶束在ZnOw表面的同时粘附，获得了聚乙二醇（PEG），ZnOw和氧化铁的中间复合物。接着，将获得的半成品分别在氮气和氢气气氛中连续烘烤，并制备了被磁性粒子改性的ZnOw（称为M-ZnOw）。制备的半成品和M-ZnOw仍保持四针状形态，而晶须表面上均匀地生成了磁性粒子，这通过扫描电子显微镜，能量损失谱和X射线衍射分析得到了证实。而且，研究表明，在ZnOw表面上原位形成的颗粒的成分受到组成比和实验条件的影响。研究还表明，PEG起到了ZnOw与磁性颗粒之间桥接的作用。进一步的实验表明，M-ZnOw在S波段似乎具有良好的微波吸收特性。 （c）2005 Elsevier B.V.保留所有权利。

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