Fe nanowire encapsulated in boron nitride nanotubes

Koi, Naruhiro; Oku, Takeo; Nishijima, Masahiko

doi:10.1016/j.ssc.2005.08.009

Cited by 45 publications

(23 citation statements)

References 13 publications

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“…Related to these methods is the work of Koi, Oku and co-workers [31][32][33][34] in which either hematite 31 or Fe 4 N powder [32][33][34] together with boron powder was annealed in nitrogen atmosphere at ϳ1000°C. Iron particles coated in BN layers, 31,32 BN nanowires, 32 hollow cages, 33 "nanobamboo" structures, 34 nanotubes, and "cup-stacked" nanotubes 33 were synthesized.…”

Section: Ball Milling and Annealingmentioning

confidence: 99%

“…Iron particles coated in BN layers, 31,32 BN nanowires, 32 hollow cages, 33 "nanobamboo" structures, 34 nanotubes, and "cup-stacked" nanotubes 33 were synthesized. In these works, the formation of BN layers in the reactions involving Fe 4 N has been described in two different ways: either Fe 4 N and Fe 2 B become liquid, boron segregates on the nanoparticle surface and reacts with the N 2 atmosphere, 32 or an amorphous boron layer on the Fe 4 N is converted to BN as the Fe 4 N is reduced from nitrogen. 34 …”

Section: Ball Milling and Annealingmentioning

confidence: 99%

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Computational study of boron nitride nanotube synthesis: How catalyst morphology stabilizes the boron nitride bond

et al. 2009

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All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. In an attempt to understand why catalytic methods for the growth of boron nitride nanotubes work much worse than for their carbon counterparts, we use first-principles calculations to study the energetics of elemental reactions forming N 2 , B 2 , and BN molecules on an iron catalyst. We observe that the local morphology of a step edge present in our nanoparticle model stabilizes the boron nitride molecule with respect to B 2 due to the ability of the step edge to offer sites with different coordination simultaneously for nitrogen and boron. Our results emphasize the importance of atomic steps for a high yield chemical vapor deposition growth of BN nanotubes and may outline new directions for improving the efficiency of the method.

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Section: Ball Milling and Annealingmentioning

confidence: 99%

Section: Ball Milling and Annealingmentioning

confidence: 99%

Computational study of boron nitride nanotube synthesis: How catalyst morphology stabilizes the boron nitride bond

et al. 2009

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“…As-produced soot synthesized via the above method was centrifuged at 8000 rpm for 2 min, and supernatant liquid is removed. 19) The remaining sediments were collected and observed. To observe the morphology of the samples before/after centrifugation, HREM and HAADF-STEM with a 300 kV electron microscope (JEM-3000F) were performed.…”

Section: Methodsmentioning

confidence: 99%

Formation and Atomic Structures of Boron Nitride Nanotubes with Cup-Stacked and Fe Nanowire Encapsulated Structures

et al. 2007

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Boron nitride (BN) nanotubes, nanohorns, nanocoils were synthesized by annealing Fe 4 N and B powders at 1000 C in nitrogen gas atmosphere. Especially, Fe-filled BN nanotubes, bamboo-type and cup-stacked type BN nanotubes were produced. Formation mechanism and nanostructures were investigated by high-resolution electron microscopy, high-angle annular dark-field scanning transmission electron microscopy, electron diffraction, energy dispersive X-ray spectroscopy and molecular mechanics calculations.

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“…Boron nitride materials are an active area of research due to their unique properties like high hardness and excellent chemical and thermal stabilities, which make them suitable in many potential applications like hydrogen and carbon dioxide storage media, sensing applications, piezoelectric and nanoelectronic devices [1][2][3][4][5] . Noticeably, there have been a few studies devoted to the optical properties of boron nitride nanoribbons (BNNRs) and nanotubes (BNNTs) 6,7 .…”

Section: Introductionmentioning

confidence: 99%

UV absorption in metal decorated boron nitride flakes: a theoretical analysis of excited states

Chopra

Plasser

2017

Molecular Physics

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Fe nanowire encapsulated in boron nitride nanotubes

Cited by 45 publications

References 13 publications

Computational study of boron nitride nanotube synthesis: How catalyst morphology stabilizes the boron nitride bond

Computational study of boron nitride nanotube synthesis: How catalyst morphology stabilizes the boron nitride bond

Formation and Atomic Structures of Boron Nitride Nanotubes with Cup-Stacked and Fe Nanowire Encapsulated Structures

UV absorption in metal decorated boron nitride flakes: a theoretical analysis of excited states

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