Morphology control of γ-Fe2O3 nanocrystals via PEG polymer and accounts of its Mössbauer study
Morphology control of γ-Fe2O3 nanocrystals via PEG polymer and accounts of its Mössbauer study
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DOI：
10.1016/s0021-9797(02)00138-8
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发表时间：
2003-04
期刊：
影响因子：
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通讯作者：
F. Xu;Xu Zhang;Yi Xie;Xiaobo Tian;Yuzhi Li
中科院分区：
文献类型：
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作者：
F. Xu;Xu Zhang;Yi Xie;Xiaobo Tian;Yuzhi Li
通过控制γ辐照反应体系的化学微环境，制备了颗粒状、针状、棒状和晶须状的γ-Fe 2 O3纳米晶。提出了一种新的伸缩卷曲效应模型来解释化学微环境对γ-Fe 2 O3纳米晶形貌的影响。采用X射线粉末衍射和透射电子显微镜对所制备的γ-Fe 2 O3纳米晶进行表征。零场穆斯堡尔谱研究表明，不同形状的γ-Fe 2 O3纳米晶均表现出不同的磁性。
Granular, needle-, rod-, or whisker-shaped γ-Fe2O3nanocrystals have been prepared via controlling the chemical microenvironment of the reaction system under γ-irradiation. A novel extension-curl-effect model was proposed to explain the effect of the chemical microenvironment on the morphology of γ-Fe2O3nanocrystals. The as-prepared γ-Fe2O3nanocrystals were characterized by powder X-ray diffraction and transmission electron microscopy. Their magnetic properties were also studied by zero-field Mössbauer spectroscopy, which indicated that different shaped γ-Fe2O3nanocrystals could exhibit interesting magnetic behavior.