Efficient production of B-substituted single-wall carbon nanotubes

Borowiak‐Palen, E.; Pichler, Thomas; Fuentes, G. G.; Graff, Andreas; Kaleńczuk, Ryszard J.; Knupfer, M.; Fink, J.

doi:10.1016/s0009-2614(03)01324-1

Cited by 97 publications

(53 citation statements)

References 16 publications

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“…The bulk sensitive EELS spectroscopy indicated an averaged boron atomic concentration of about 15 at.%, in agreement with our previous local TEM-EELS analysis. 12 In addition, both TEM and bulk sensitive EELS revealed nitrogen concentrations always below the sensitivity of the method ͑1.5 at.%͒.…”

Section: Resultsmentioning

confidence: 95%

“…11 Boron doping with an averaged substitution level of ϳ15 at.% was achieved by a substitution reaction in an NH 3 atmosphere. 12 Transmission electron microscopy (TEM) characterization after the substitution reaction revealed the presence of high-purity nanotube bundles with a homogeneous diameter distribution. Transmission electron microscopy electron energy-loss spectros-copy mode (TEM-EELS) analysis with 10 nm beam size showed that locally the substitution level is up to 20 at.%.…”

Section: Resultsmentioning

confidence: 99%

“…Films of 100 nm effective thickness were prepared as described elsewhere. 12 Optical-absorption spectra were measured with a resolution of 0.25 meV. Core-level excitation spectra were collected in a purpose built high-resolution EELS spectrometer described elsewhere.…”

Section: Resultsmentioning

confidence: 99%

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Formation and electronic properties ofBC3single-wall nanotubes upon boron substitution of carbon nanotubes

et al. 2004

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We report a detailed experimental and theoretical study on the electronic and optical properties of highly boron-substituted (up to 15 at.%) single-wall carbon nanotubes. Core-level electron energy-loss spectroscopy reveals that the boron incorporates into the lattice structure of the tubes, transferring ϳ1 / 2 hole per boron atom into the carbon derived unoccupied density of states. The charge transfer and the calculated Fermi-energy shift in the doped nanotubes evidence that a simple rigid-band model can be ruled out and that additional effects such as charge localization and doping induced band-structure changes play an important role at this high doping levels. In optical absorption a new peak appears at 0.4 eV which is independent of the doping level. Compared to the results from a series of ab initio calculations our results support the selective doping of semiconducting nanotubes and the formation of BC 3 nanotubes instead of a homogeneous random boron substitution.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Formation and electronic properties ofBC3single-wall nanotubes upon boron substitution of carbon nanotubes

et al. 2004

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“…Zhou et al showed theoretically that the Li binding energy can be enhanced through B doping in SWCNTs [30]. We note that several types of boron carbide (BC) nanotubes have been fabricated in the laboratory such as BC 3 and (B x C, x≤ 0.1) nanotubes [31][32][33][34][35][36][37][38]. Thus, it is possible to design and produce pillared boron carbide nanotubes.…”

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confidence: 99%

Hydrogen Storage in Pillared Li-Dispersed Boron Carbide Nanotubes

2008

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Ab initio density-functional theory study suggests that pillared Li-dispersed boron carbide nanotubes is capable of storing hydrogen with a mass density higher than 6.0 weight% and a volumetric density higher than 45 g/L. The boron substitution in carbon nanotube greatly enhances the binding energy of Li atom to the nanotube, and this binding energy (~ 2.7 eV) is greater than the cohesive energy of lithium metal (~1.7 eV), preventing lithium from aggregation (or segregation) at high lithium doping concentration. The adsorption energy of hydrogen on the Li-dispersed boron carbide nanotube is in the range of 10 -24 kJ/mol, suitable for reversible H 2 adsorption/desorption at room temperature and near ambient pressure.

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“…Doping nanotubes is an effective way to extensively modify their various properties [1][2][3][4] . The doped nanotubes can exhibit dramatic changes with respect to the undoped material 5 .…”

Section: Introductionmentioning

confidence: 99%

Doping Reaction of some Nanotubes with Aluminium Atom: A Thermodynamic PM6 and ONIOM Investigation

Zeighami¹,

Gholami²,

Boshra³

2017

Orient. J. Chem

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The doping reaction of boron nitride and carbon nanotubes with aluminium atom was theoretically investigated. ONIOM method and PM6 method have been used to evaluate the thermochemistry of doping reactions of single walled boron nitride nanotubes and carbon nanotubes. The enthalpy changes, Gibbs free energy changes, of studied doping reactions were evaluated at different temperatures. All nanotubes were single-walled and finite length with hydrogen saturation in the terminal atoms. The thermodynamic calculations based on the ONIOM and PM6 levels results showed (8,0)CNT is the best candidate for Al-doping reaction.result suggest the aluminum doped boron nitride nanotubes and carbon nanotubes may be considered the proper carries for the drug delivery.

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Efficient production of B-substituted single-wall carbon nanotubes

Cited by 97 publications

References 16 publications

Formation and electronic properties ofBC3single-wall nanotubes upon boron substitution of carbon nanotubes

Formation and electronic properties ofBC3single-wall nanotubes upon boron substitution of carbon nanotubes

Hydrogen Storage in Pillared Li-Dispersed Boron Carbide Nanotubes

Doping Reaction of some Nanotubes with Aluminium Atom: A Thermodynamic PM6 and ONIOM Investigation

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