水相中一步合成长期稳定的铁酸锌纳米棒超顺磁胶体
One-Step Synthesis of Long Term Stable Superparamagnetic Colloid of Zinc Ferrite Nanorods in Water.
作者信息
Kmita Angelika, Lachowicz Dorota, Żukrowski Jan, Gajewska Marta, Szczerba Wojciech, Kuciakowski Juliusz, Zapotoczny Szczepan, Sikora Marcin
机构信息
Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland.
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland.
出版信息
Materials (Basel). 2019 Mar 29;12(7):1048. doi: 10.3390/ma12071048.
Synthesis of spinel zinc ferrite ultrafine needle-like particles that exhibit exceptional stability in aqueous dispersion (without any surfactants) and superparamagnetic response is reported. Comprehensive structural and magnetic characterization of the particles is performed using X-ray and electron diffraction, small angle X-ray scattering, transmission electron microscopy, dynamic light scattering, vibrating sample magnetometry, Mössbauer spectroscopy and high-resolution X-ray spectroscopy. It reveals nearly stoichiometric ZnFe₂O₄ nanorods with mixed spinel structure and unimodal size distribution of mean length of 20 nm and diameter of 5 nm. Measurements performed in aqueous and dried form shows that particles' properties are significantly changed as a result of drying.
据报道，合成了在水性分散体中（无需任何表面活性剂）表现出卓越稳定性和超顺磁响应的尖晶石型铁酸锌超细针状颗粒。使用X射线和电子衍射、小角X射线散射、透射电子显微镜、动态光散射、振动样品磁强计、穆斯堡尔光谱和高分辨率X射线光谱对颗粒进行了全面的结构和磁性表征。结果表明，该颗粒为近化学计量比的具有混合尖晶石结构的ZnFe₂O₄纳米棒，平均长度为20 nm，直径为5 nm，尺寸分布呈单峰。对水性和干燥形式的颗粒进行的测量表明，干燥会使颗粒的性质发生显著变化。
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