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

Oku, Takeo; Koi, Naruhiro; Narita, Ichihito; Suganuma, Katsuaki; Nishijima, Masahiko

doi:10.2320/matertrans.48.722

Cited by 12 publications

(3 citation statements)

References 20 publications

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“…Furthermore, since the properties of low-dimensional materials strongly depend on their structural characteristics (such as size, shape, and surface states), the controllable synthesis of one-dimensional (1D) BN nanostructures is extremely important with regard to investigations of their fundamental properties [15]. So far, few reports have focused on the growth mechanism of BN nanomaterials (usually considering only one special synthesis condition), and very rarely has there been a comprehensive study on the effect of growth conditions on the structure and formation mechanism of these nanostructures [15,16].…”

Section: Introductionmentioning

confidence: 99%

A comprehensive analysis of the CVD growth of boron nitride nanotubes

Pakdel¹,

Chen²,

Bando³

et al. 2012

Nanotechnology

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Boron nitride nanotube (BNNT) films were grown on silicon/silicon dioxide (Si/SiO(2)) substrates by a catalytic chemical vapor deposition (CVD) method in a horizontal electric furnace. The effects of growth temperature and catalyst concentration on the morphology of the films and the structure of individual BNNTs were systematically investigated. The BNNT films grown at 1200 and 1300 °C consisted of a homogeneous dispersion of separate tubes in random directions with average outer diameters of ~30 and ~60 nm, respectively. Meanwhile, the films grown at 1400 °C comprised of BNNT bundles in a flower-like morphology, which included thick tubes with average diameters of ~100 nm surrounded by very thin ones with diameters down to ~10 nm. In addition, low catalyst concentration led to the formation of BNNT films composed of entangled curly tubes, while high catalyst content resulted in very thick tubes with diameters up to ~350 nm in a semierect flower-like morphology. Extensive transmission electron microscopy (TEM) investigations revealed the diameter-dependent growth mechanisms for BNNTs; namely, thin and thick tubes with closed ends grew by base-growth and tip-growth mechanisms, respectively. However, high catalyst concentration motivated the formation of filled-with-catalyst BNNTs, which grew open-ended with a base-growth mechanism.

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Section: Introductionmentioning

confidence: 99%

A comprehensive analysis of the CVD growth of boron nitride nanotubes

Pakdel¹,

Chen²,

Bando³

et al. 2012

Nanotechnology

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“…Figure 20(a) shows TEM image of BN nanotubes with a cup-stacked structure after purification process (Oku et al 2007). Diameters and lengths of the BN nanotubes are in the range of 40-100 nm and 5-10 μm, respectively.…”

Section: Bn Nanotubes With Cup-stacked Structuresmentioning

confidence: 99%

Synthesis, Atomic Structures and Properties of Boron Nitride Nanotubes

Oku¹

2013

Physical and Chemical Properties of Carbon Nanotubes

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“…They showed that Ni-BNNTs are promising low-temperature catalysts for CO oxidation. The encapsulation of various metal nanostructures inside CNTs and BNNTs has been successfully demonstrated by different groups using experiments and molecular dynamics simulations (see, for example, [20,[23][24][25][26]), but very few works in this field have used conventional applied mathematical modelling. Mathematical modelling, together with efforts of experimentalists and molecular dynamics (MD) simulations, can provide a deeper understanding of the interactions between molecules.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Nickel Atoms Interacting with Single-Walled Nanotubes

Alshehri

2019

Advances in Mathematical Physics

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Herein, the encapsulation mechanism of nickel atoms into carbon and boron nitride nanotubes is investigated to determine the interaction energies between the nickel atom and a nanotube. Classical modelling procedures, together with the 6-12 Lennard-Jones potential function and the hybrid discrete-continuous approach, are used to calculate the interaction of a nickel atoms with (i,i) armchair and (i,0) zigzag single-walled nanotubes. Analytical expressions for the interaction energies are obtained to determine the optimal radii of the tubes to enclose the nickel atom by determining the radii that give the minimum interaction energies. We first investigate the suction energy of the nickel atom entering the nanotube. The atom is assumed to be placed on the axis and near an open end of a semi-infinite, single-walled nanotube. Moreover, the equilibrium offset positions of the nickel atoms are found with reference to the cross-section of the nanotubes. The results may further the understanding of the encapsulation of Ni atoms inside defective nanotubes. Furthermore, the results may also aid in the design of nanotube-based materials and increase the understanding of their nanomagnetic applications and potential uses in other areas of nanotechnology.

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

Cited by 12 publications

References 20 publications

A comprehensive analysis of the CVD growth of boron nitride nanotubes

A comprehensive analysis of the CVD growth of boron nitride nanotubes

Synthesis, Atomic Structures and Properties of Boron Nitride Nanotubes

Modelling of Nickel Atoms Interacting with Single-Walled Nanotubes

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