| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Self-assembled Growth of Fe Doped AlN Nanowires/3D Nanosheets Composite Hierarchical Nanostructures |
| FU Nian1, GU Yu2, GUO Yu1, ZHANG Jianfei1, CHEN Daojun1, LIU Xiaoyu1, CONG Ridong1
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1 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2 Material Systems for Nanoelectronics, Chemnitz University of Technology, Chemnitz 09107, Germany |
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Abstract Self-assembled hierarchical nanostructures have attracted wide attention due to their novel properties. In this paper, plasma-assisted direct current (DC) arc discharge method was used to one-step prepare AlN∶Fe nanowires/three dimensional (3D) nanosheets composite hierarchical nanostructures using FeAl alloy and N2 as the reaction sources. X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray electron spectrometer (EDS), high-resolution transmission electron microscope (HRTEM) were carried on for the detailed analysis of the crystal structure, morphology, element composition, microstructure of the hierarchical structure. We found that the combined hierarchical nanostructures are composed of in situ self-assemble of AlN∶Fe nanoparticles on the one-dimensional AlN∶Fe nanwires. Investigation on the growth mechanism of the hierarchical nanostructures showed that the electric dipole moment and surface charge accumulation of AlN∶Fe magnetic nanoparticles cooperatively promote the self-assembly of magnetic nanoparticles to form the AlN∶Fe nanosheet structure. At the same time, magnetism analysis showed that the hierarchical nanostructures exhibit ferromagnetism at room temperature. The spontaneous polarization caused by uncancelled spontaneous magnetic moment in 3d band of Fe3+ should be the primary cause of its magnetism. The implementation of this work provides the feasibility of using self-assembly magnetic nanoparticles to prepare complex hierarchical nanostructure system.
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Published: 29 May 2020
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| Fund:This work was financially supported by the National Natural Science Foundation of China (11703004, 61504036), Natural Science Foundation of Hebei Pro-vince (E2017201209, A2016201087). |
About author:: Nian Fu received his Ph.D. degree in materials science and engineering from Hebei University of Technology in 2015. He is currently an associate professor in College of Physics Science & Technology, Hebei University. He is mainly engaged in the preparation, characterization and application research of thermoelectric materials, nanocomposites, polymer materials and other materials.
Xiaoyu Liu received her Ph.D. degree in optics from Jilin University in 2014. She is currently a lecturer in College of Physics Science & Technology, Hebei University. She is mainly engaged in the preparation, cha-racterization of nanomaterials and flexible transparent conductive film. |
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2020, Vol. 34 
