C−BN Patterned Single-Walled Nanotubes Synthesized by Laser Vaporization

Enouz, S.; Stéphan, Odile; Cochon, Jean-Lou; Colliex, C.; Loiseau, Annick

doi:10.1021/nl070327z

Cited by 136 publications

(96 citation statements)

References 46 publications

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“…Following the advances in experimental growth of hybrid C-BN nanostructures, [7][8][9] the stability of domain-separated C and BN nanosheets and nanotubes has been studied by first-principles simulations in the last few years. [10][11][12][13][14] There is general agreement that segregation is energetically advantageous, because B-N and C-C bonds are more stable than C-N and C-B bonds and the former are favored by the formation of C and BN domains.…”

Section: Introductionmentioning

confidence: 99%

Native defects in hybrid C/BN nanostructures by density functional theory calculations

Pruneda

2012

Phys. Rev. B

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First-principles calculations of substitutional defects and vacancies are performed for zigzag-edged hybrid C/BN nanosheets and nanotubes which recently have been proposed to exhibit half-metallic properties. The formation energies show that defects form preferentially at the interfaces between graphene and BN domains rather than in the middle of these domains, and that substitutional defects dominate over vacancies. Chemical control can be used to favor localization of defects at C-B interfaces (nitrogen-rich environment) or C-N interfaces (nitrogen-poor environment). Although large defect concentrations have been considered here (10 6 cm −1 ), halfmetallic properties can subsist when defects are localized at the C-B interface and for negatively charged defects localized at the C-N interface; hence the promising magnetic properties theoretically predicted for these zigzag-edged nanointerfaces might not be destroyed by point defects if these are conveniently engineered during synthesis.

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Section: Introductionmentioning

confidence: 99%

Native defects in hybrid C/BN nanostructures by density functional theory calculations

Pruneda

2012

Phys. Rev. B

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“…[10][11][12][13][14][15][16] Also nanotubes of BN/C in various patterns were synthesized experimentally. [17][18][19] Owing to synthesis of single layer composite structures consisting of adjacent BN and graphene domains, 20 C/BN core/shell (CS) structures have been a focus of interest. These structures can find novel technological applications in electronics and photonics in the view of the recent realization of nanoscale meshes or periodically patterned nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional C/BN core/shell structures

Cahangirov

Çiraci

2011

Phys. Rev. B

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Single layer core/shell structures consisting of graphene as core and hexagonal boron nitride as shell are studied using first-principles plane wave method within density functional theory. Electronic energy level structure is analysed as a function of the size of both core and shell. It is found that the confinement of electrons in two dimensional graphene quantum dot is reduced by the presence of boron nitride shell. The energy gap is determined by the graphene states. Comparison of round, hexagonal, rectangular and triangular core/shell structures reveals that their electronic and magnetic states are strongly affected by their geometrical shapes. The energy level structure, energy gap and magnetic states can be modified by external charging. The core part acts as a two-dimensional quantum dot for both electrons and holes. The capacity of extra electron intake of these quantum dots is shown to be limited by the Coulomb blockade in two-dimension.

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“…Even this system has been theoretically investigated and has been recently synthesized experimentally. Hybrid C-BN nanotubes with BN domains have been synthesized earlier by laser vaporization however there was no report on their electronic properties 165 . Theoretical study on the same system has revealed band gap opening in such hybrid nanotubes.…”

Section: Hybridsmentioning

confidence: 99%

Graphene Synthesis and Band Gap Opening

Jariwala

Srivastava²,

Ajayan³

2011

J. Nanosci. Nanotech.

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Graphene-the wonder material has attracted a great deal of attention from varied fields of condensed matter physics, materials science and chemistry in recent times. Its 2D atomic layer structure and unique electronic band structure makes it attractive for many applications. Its high carrier mobility, high electrical and thermal conductivity make it an exciting material. However, its applicability cannot be effectively realised unless facile techniques to synthesize high quality, large area graphene are developed in a cost effective way. Besides that a great deal of effort is required to develop techniques for modifying and opening its band structure so as to make it a potential replacement for silicon in future electronics. Considerable research has been carried out for synthesizing graphene and related materials by a variety of processes and at the same time a great deal of work has also taken place for manipulating and opening its electronic band structure. This review summarizes recent developments in the synthesis methods for graphene. It also summarizes the developments in graphene nanoribbon synthesis and methods to open band gap in graphene, in addition to pointing out a direction for future research and developments.

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C−BN Patterned Single-Walled Nanotubes Synthesized by Laser Vaporization

Cited by 136 publications

References 46 publications

Native defects in hybrid C/BN nanostructures by density functional theory calculations

Native defects in hybrid C/BN nanostructures by density functional theory calculations

Two-dimensional C/BN core/shell structures

Graphene Synthesis and Band Gap Opening

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