Evolution of Irradiation-Induced Vacancy Defects in Boron Nitride Nanotubes.

@article{Cheng2016EvolutionOI,
  title={Evolution of Irradiation-Induced Vacancy Defects in Boron Nitride Nanotubes.},
  author={Guangming Cheng and Shanshan Yao and Xiahan Sang and Boyi Hao and Dongyang Zhang and Yoke Khin Yap and Yong Zhu},
  journal={Small},
  year={2016},
  volume={12 6},
  pages={
          818-24
        }
}
Irradiation-induced vacancy defects in multiwalled (MW) boron nitride nanotubes (BNNTs) are investigated via in situ high-resolution transmission electron microscope operated at 80 kV, with a homogeneous distribution of electron beam intensity. During the irradiation triangle-shaped vacancy defects are gradually generated in MW BNNTs under a mediate electron current density (30 A cm(-2)), by knocking the B atoms out. The vacancy defects grow along a well-defined direction within a wall at the… 

Figures from this paper

Intrinsic and Defect-Related Elastic Moduli of Boron Nitride Nanotubes as Revealed by in Situ Transmission Electron Microscopy.
TLDR
Excellent intrinsic elastic properties and decent radiation-resistance prove that BNNTs could be a material of choice for applications in extreme environments, such as those existing in space.
Interaction of dislocations with twinning boundary in bi-twinned metallic nanowires
Metallic NWs usually exhibit ultrahigh mechanical strength and are ideal candidates for studying fundamental deformation mechanisms at the nanoscale.[1-5] Metallic NWs with internal TBs have received
Tensile detwinning in bi-twinned metallic nanowires
Metallic NWs usually exhibit ultrahigh mechanical strength and are ideal candidates for studying fundamental deformation mechanisms at the nanoscale.[1-5] Metallic NWs with internal TBs have received
Structural Attributes and Photodynamics of Visible Spectrum Quantum Emitters in Hexagonal Boron Nitride.
TLDR
This paper investigates correlations between h-BN structural features and emitter location from bulk down to the monolayer at room temperature and analyzes the emitters' spectral features to show that they are dominated by the interaction of their electronic transition with a single Raman active mode of h-bn.
Identification of interfacial defects in the layered structure of a chalcopyrite compound

References

SHOWING 1-10 OF 86 REFERENCES
Defective structure of BN nanotubes: from single vacancies to dislocation lines.
TLDR
It is concluded that under irradiation BN SWNT may have a very stable alteration of its electronic and optical properties.
Characterization of ion-irradiation-induced defects in multi-walled carbon nanotubes
We study the effects of Ar + , He + and C + ion irradiation on multi- walled carbon nanotubes at room and elevated temperatures with transmission electron microscopy (TEM) and Raman spectroscopy.
Multi- and single-walled boron nitride nanotubes produced from carbon nanotubes by a substitution reaction
Boron nitride (BN) multi-walled (MWNT) or single-walled (SWNT) nanotubes were synthesized from carbon MWNT and SWNT templates, respectively, under heating of C nanotubes together with boron trioxide
Field emission and strain engineering of electronic properties in boron nitride nanotubes.
TLDR
A strain-engineering pathway is demonstrated to tune the electronic properties of boron nitride nanostructures under multiple cycles of FE experiments and shows that the conductivity of BNNTs can be tuned by means of mechanical straining.
In-situ atomic-scale observation of irradiation-induced void formation.
TLDR
In-situ atomic-scale observation of the nucleation and growth of voids in hexagonal close-packed magnesium under electron irradiation shows that the initial growth in length is controlled by slow nucleation kinetics of vacancy layers on basal facets and anisotropic vacancy diffusivity, and the subsequent thickness growth is driven by thermodynamics to reduce surface energy.
Effect of electron irradiation on the electrical properties of fibers of aligned single-walled carbon nanotubes
We carried out in situ resistivity measurements on macroscopic oriented ropes of single wall carbon nanotubes in a transmission electron microscope. We have found a minimum in the resistivity as a
Electron beam machining of nanometer-sized tips from multiwalled boron nitride nanotubes
We report here that high energy electron irradiation of multiwalled boron nitride nanotubes can be used to form sharp, crystalline, conical tips, or to cut boron nitride nanotubes by controlling the
Ion and electron irradiation-induced effects in nanostructured materials
A common misconception is that the irradiation of solids with energetic electrons and ions has exclusively detrimental effects on the properties of target materials. In addition to the well-known
Controlled radiation damage and edge structures in boron nitride membranes.
We show that hexagonal boron nitride membranes synthesized by chemical exfoliation are more resistant to electron beam irradiation at 80 kV than is graphene, consistent with quantum chemical
Effective growth of boron nitride nanotubes by thermal chemical vapor deposition.
TLDR
It is found that these BNNTs have an absorption band edge of 5.9 eV, approaching that of single h-BN crystals, which is promising for future nanoscale deep-UV light emitting devices.
...
1
2
3
4
5
...