Composite Nanostructures Based on Template-Grown Boron Nitride Nanotubules

Shelimov, Konstantin B.; Moskovits, Martin

doi:10.1021/cm9905996

Cited by 124 publications

(83 citation statements)

References 28 publications

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“…Table 1 gives a summary of the calculations for molecular gas flow parameters and reaction kinetic data of several CVD processes [4,45] Figure 1 that the Knudsen number (accounting for the kinetics of CVD through k¢) is the primary factor that determines the aspect ratio and hence the geometrical characteristics achieved for the deposited nanocylinders. Increasing Kn above 5 10 ±6 results in substantial degradation in nanotube wall thickness along the membrane pore length (z).…”

Section: Resultsmentioning

confidence: 99%

“…In practice, the thickness of the nanotube material, d, being deposited on the membrane pore sidewalls, is comparable to the starting radius of the pores. [4,15,16] Therefore, as the nanotube growth proceeds, the membrane pore radius, R p , shrinks and the template aspect ratio, L/2 R p , increases. This introduces a nonstationary effect to the overall CVD process, that can be accounted for using an approach developed for moving boundary condition problems.…”

Section: Mathematical Description Of Nanoscale Cvdmentioning

confidence: 99%

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Template‐Directed CVD of Dielectric Nanotubes

Zambov

Zambova

Cabassi

et al. 2003

Chemical Vapor Deposition

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Fabrication of dielectric nanotubes from silicon dioxide and silicon nitride by a template-based electron cyclotron resonance (ECR) plasma-enhanced (PE) CVD is described. The nanotubes synthesized from SiH 4 -O 2 and SiH 4 -N 2 binary source reagent systems are smooth, transparent and at least 10 lm long. A mathematical description of the template-directed nanometer-scale CVD is developed to elucidate the appropriate process parameters that enable growth of high-aspect-ratio nanotubes with uniform wall thickness. The analysis of the model, by establishing general trends between process operating conditions and geometrical characteristics of the nanotubes, clarifies the mechanism of nanoscale CVD. The dielectric nanotubes obtained provide many opportunities for fabricating composite nanostructures and nanodevices.

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Section: Resultsmentioning

confidence: 99%

Section: Mathematical Description Of Nanoscale Cvdmentioning

confidence: 99%

Template‐Directed CVD of Dielectric Nanotubes

Zambov

Zambova

Cabassi

et al. 2003

Chemical Vapor Deposition

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“…[151] There has also been recent data on electrochemical deposition of Cu into sub-micrometer-thick BN tubular fibers. [152] In many cases BN layer coating on metallic or semiconducting nanowires proceeds more easily than post-synthesis tube filling. These findings have stimulated the fabrication of metallic, ceramic, or semiconducting nanowires placed within tubular BN channels.…”

Section: Wire Fillingmentioning

confidence: 99%

Boron Nitride Nanotubes

et al. 2007

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The current status of research on boron nitride nanotubes (BNNTs)—carbon nanotube structural analogues—is discussed. Latest achievements in BNNT synthesis, morphology, and atomic structure analysis as well as physical, chemical, and functional property evaluations are reviewed. Similarities and differences between structural parameters and properties of BNNTs in comparison with conventional carbon nanotubes are particularly highlighted. Recent breakthroughs in BNNT filling, doping and functionalization, morphology, and electronic structure engineering are examined. Finally, prospective BNNT applications for fabricating field‐effect transistors, gas accumulators, and reinforcing polymer films are presented.

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“…CVD methods for producing BN filaments and BNNTs have been utilized in several works. [35][36][37][38][39][40][41] Gleize et al 35 used diborane and ammonia or N 2 gases as the boron and nitrogen containing precursors. These were deposited on various boride surfaces ͑including Zr, Hf, Ti, V, Nb, and Ta borides͒ at a temperature of 1100°C.…”

Section: Chemical Vapor Depositionmentioning

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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Composite Nanostructures Based on Template-Grown Boron Nitride Nanotubules

Cited by 124 publications

References 28 publications

Template‐Directed CVD of Dielectric Nanotubes

Template‐Directed CVD of Dielectric Nanotubes

Boron Nitride Nanotubes

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

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