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Formation and Structure of Boron Nitride Nanotubes 被引量:1
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作者 JiangZHANG ZongquanLI JinXU 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第1期128-130,共3页
Boron nitride (BN) nanotubes were simply synthesized by heating well-mixed boric acid, urea and iron nitrate powders at 1000℃. A small amount of BN nanowires was also obtained in the resultants. The morphological and... Boron nitride (BN) nanotubes were simply synthesized by heating well-mixed boric acid, urea and iron nitrate powders at 1000℃. A small amount of BN nanowires was also obtained in the resultants. The morphological and structural characters of the BN nanostructures were studied using transmission electron microscopy. Other novel BN nanos-tructures, such as Y-junction nanotubes and bamboo-like nanotubes, were simultaneously observed. The growth mechanism of the BN nanotubes was discussed briefly. 展开更多
关键词 bn nanotubes Vapor deposition Electron microscopy
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Fabrication and Growth Mechanism of Bamboo-structured Boron Nitride Nanotubes with Thorn-Like Morphology
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作者 张弜 陈熹 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第5期555-558,I0003,I0004,共6页
Bamboo-structured boron nitride (BN) nanotubes with thorn-like morphology were synthe-sized by thermal chemical reaction using amorphous boron powders and NiO nanoparticles as precursors under the flow of NH3 at 110... Bamboo-structured boron nitride (BN) nanotubes with thorn-like morphology were synthe-sized by thermal chemical reaction using amorphous boron powders and NiO nanoparticles as precursors under the flow of NH3 at 1100 oC. The structural and morphological charac-teristics of BN nanotubes were investigated by X-ray diraction and transmission electron microscopy. The results showed that the thorn-like nanostructures attaching to the stems of bamboo-structured BN nanotubes were the hexagonal BN nano akes. Based on the diffu-sion of solid B and vapor B2O2, a possible growth mechanism of these novel thorn-like BN nanotubes was primarily proposed. 展开更多
关键词 bn nanotube Thermal chemical synthesis X-ray diffraction Electron microscopy
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Electronic structures and magnetic properties of rare-earth-atom-doped BNNTs
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作者 Juan Ren Ning-Chao Zhang +3 位作者 Peng Wang Chao Ning Hong Zhang Xiao-Juan Peng 《Frontiers of physics》 SCIE CSCD 2016年第2期67-73,共7页
Stable geometries, electronic structures, and magnetic properties of (8,0) and (4,4) single-walled BN nanotubes (BNNTs) doped with rare-earth (RE) atoms are investigated using the first-principles pseudopotent... Stable geometries, electronic structures, and magnetic properties of (8,0) and (4,4) single-walled BN nanotubes (BNNTs) doped with rare-earth (RE) atoms are investigated using the first-principles pseudopotential plane wave method with density functional theory (DFT). The results show that these RE atoms can be effectively doped in BNNTs with favorable energies. Because of the curvature effect, the values of binding energy for RE-atom-doped (4,4) BNNTs are larger than those of the same atoms on (8,0) BNNTs. Electron transfer between RE-5d, 6s, and B-2p, N-2p orbitals was also observed. Furthermore, electronic structures and magnetic properties of BNNTs can be modified by such doping. The results show that the adsorption of Ce, Pm, Sm, and Eu atoms can induce magnetization, while no magnetism is observed when BNNTs are doped with La. These results are useful for spintronics applications and for developing magnetic nanostructures. 展开更多
关键词 density functional theory RE atoms single-walled bn nanotubes doping
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