Boron nitride nanotubes and nanowires

Deepak, Francis Leonard; Vinod, C. P.; Mukhopadhyay, Kingsuk; Govindaraj, A.; Rao, C. N. R.

doi:10.1016/s0009-2614(02)00007-6

Cited by 156 publications

(81 citation statements)

References 16 publications

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“…50 Finally, the most successful method up to date for synthesizing BNNTs is by Tang and co-workers. 9,51,52 In the method of Tang et al, 9,51,52 boric oxide vapor was created in situ and reacted with ammonia at temperatures T Ն 1100°C.…”

Section: E Othermentioning

confidence: 99%

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: E Othermentioning

confidence: 99%

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

et al. 2009

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“…Thus, Tang et al [6] have reported the tubular form of BN by heating a mixture of boron and iron oxide in the presence of ammonia atmosphere at 1300°C for few hours. In another chemical reaction reported by Deepak et al [7] BN nanotubes were synthesized by heating a mixture of boric acid with activated carbon, multi-walled carbon nanotubes using catalytic iron particles in the presence of ammonia. Laser ablation method has also turned to be an effective means for the synthesis of BN nanotubes [8,9] and their morphology depends strongly upon the used catalyst.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of boron nitride nanotubes employing mechanothermal process and its characterization

et al. 2008

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Multi-walled boron nitride (BN) nanotubes having cylindrical structure were synthesized employing the mechanothermal process. In this process hexagonal boron nitride powder (hBN) was first ball milled for 50-100 h using a high-energy ball mill and the ball-milled samples were annealed in N 2 atmosphere for about 10 h in the temperature range of 950-1300°C. The BN nanotubes exhibited a well-crystallized hexagonal structure with about 25-40 nm in diameter and up to 1 lm length. These BN nanotubes were well characterized using various techniques, such as, XRD, SEM, TEM and Raman Spectroscopy.

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“…The reaction of boric acid or B 2 O 3 with N 2 or NH 3 at high temperatures in the presence of carbon or catalytic metal particles has also been employed in the preparation of BN nanotubes. [200] BN nanotubes can be grown directly on substrates at 873 K by a plasma-enhanced laser-deposition technique. [201] B 2 O 3 -coated multi-walled carbon nanotubes, on reaction with NH 3 at high temperatures, yield BN nanotubes.…”

Section: Nanotubes Of Titanates and Other Complex Oxidesmentioning

confidence: 99%

Synthesis of Inorganic Nanotubes

2009

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Nanotubes constitute an exciting class of one‐dimensional nanomaterials of which carbon nanotubes are recognized widely as materials of importance. The possibility of having inorganic nanotubes was recognized early in the 1990s, accompanied by the report of nanotubes of MoS2 and WS2. Since then, nanotubes of several inorganic materials have been prepared and characterized. While nanotubes of metal chalcogenides and oxides form a high proportion of the inorganic nanotubes investigated hither to, nanotubes of many other materials have also been prepared and characterized. Several synthetic strategies including both physical and chemical methods have been employed, of which the use of templates, precursors, and hydro‐ or solvothermal methods are prominent. In this article, we shall present a brief account of the present status of the synthesis of nanotubes of elemental materials as well as binary and complex metal oxides, chalcogenides, pnictides and carbides.

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Boron nitride nanotubes and nanowires

Cited by 156 publications

References 16 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

Synthesis of boron nitride nanotubes employing mechanothermal process and its characterization

Synthesis of Inorganic Nanotubes

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