School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin 150080, China.
Sci Rep. 2017 Apr 3;7:45480. doi: 10.1038/srep45480.
We report the thermal annealing-induced formation of ring-like structure of Zn(II)-doped magnetite from iron alkoxide leaf-like nanoplate precusor. The phase, structure and morphology of magnetite nanorings were comprehensively characterized by powder X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscope, scanning electron microscope, and transmission electron microscope. The obtained Zn(II)-doped magnetite nanorings are of 13-20 nm in edge width, 70-110 nm in short axis length and 100-150 nm in long axis length. The growth mechanism was possibly due to a combined effect of decomposition of the organic component and diffusion growth. Zn(II)-doped magnetite nanorings delivered saturation magnetization of 66.4 emu/g and coercivity of 33 Oe at room temperature. In addition, the coatings containing Zn(II)-doped magnetite nanorings as fillers exhibit excellent microwave absorption properties with a maximum reflection loss of -40.4 dB and wide effective absorbing band obtained in coating with thin thickness of 1.50 mm.
我们报告了由铁醇盐类纳米薄片前体热退火诱导形成的 Zn(II)掺杂的磁性氧化铁环状结构。通过粉末 X 射线衍射、X 射线光电子能谱、原子力显微镜、扫描电子显微镜和透射电子显微镜对磁性氧化铁纳米环的相、结构和形态进行了综合表征。得到的 Zn(II)掺杂的磁性氧化铁纳米环的边缘宽度为 13-20nm，短轴长度为 70-110nm，长轴长度为 100-150nm。生长机制可能是由于有机成分的分解和扩散生长的共同作用。室温下，Zn(II)掺杂的磁性氧化铁纳米环的饱和磁化强度为 66.4 emu/g，矫顽力为 33 Oe。此外，含有 Zn(II)掺杂的磁性氧化铁纳米环作为填料的涂层具有优异的微波吸收性能，在厚度为 1.50mm 的涂层中获得了最大反射损耗为-40.4dB 和宽有效吸收带宽。
