Chirality of internal metallic and semiconducting carbon nanotubes

Bacsa, Revathi; Peigney, Alain; Billon, Laurent; Puech, Pascal; Bacsa, Wolfgang

doi:10.1103/physrevb.65.161404

Cited by 58 publications

(40 citation statements)

References 27 publications

(49 reference statements)

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“…14 Basca et al 8 has reported the interlayer distance for DWNTs of small diameters to be smaller than that of graphite, but such small interlayer separations were not observed in our results. In general, it is not expected that DWNTs will have an interlayer space smaller than that for crystalline graphite.…”

Section: Resultscontrasting

confidence: 55%

“…[5][6][7] However, the two constituent tubes of the DWNTs have not yet been characterized in detail. Basca et al 8 and Bandow et al 3,9 characterized their DWNTs by measuring the Raman spectra, and most of their radial breathing mode (RBM) frequencies RBM were found to be greater than 200 cm −1 , which are in accordance with DWNTs that have small diameter inner constituents. They have also found the Raman signal to be weak, which is probably caused by the low concentration of DWNTs in their samples.…”

Section: Introductionmentioning

confidence: 81%

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Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies

Chou

Ren

et al. 2003

J. Mater. Res.

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Double-walled carbon nanotubes (DWNTs), synthesized by the catalytic decomposition of methane, were explored by resonance Raman spectroscopy using different energies for laser excitation. Based on the radial breathing mode frequencies, the indices of the two layers of a DWNT were approximately assigned, depending on the interlayer separation of the two coaxial layers of the DWNT, which ranged from 0.34 to 0.40 nm. From the tentatively assigned results, it was found that the two walls of the DWNT are not strongly selected by chirality and diameter. The results, however, suggest that, for the tubes that are resonant with the available laser excitation energies, most of the outer layers of the observed DWNTs in our samples are semiconducting, while the inner layers of the observed DWNTs are either semiconducting or metallic based on the assembled DWNTs. The characteristics of the G, D, and GЈ band of the DWNTs are discussed, and a double peak feature in the D and GЈ band, originating from the inner and outer layers of the DWNTs, is reported.

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Section: Resultscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 81%

Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies

Chou

Ren

et al. 2003

J. Mater. Res.

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“…Also, the high-energy mode in MWCNT is very similar to the graphite G mode, mainly because of the large nanotube diameters. In contrast, DWCNTs typically consist of smaller-diameter tubes and have a Raman spectrum similar to that of SWCNTs [28][29][30]. The long-range part of interaction is essential in describing the excited state of C 60 .…”

Section: Resultsmentioning

confidence: 99%

Strong correlation effects in the (5,5)@(10,10) double-walled carbon nanotubes in the framework of the t–J model

Rostampour

2016

J Comput Electron

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Double-walled carbon nanotubes are coaxial nanostructures composed of exactly two single-walled carbon nanotubes, one nested in another. This unique structure offers advantages and opportunities for extending our knowledge and application of the carbon nanomaterials family. An emphasis is placed on the double wall physics that contributes to these structures' complex inter-wall coupling of electronic and optical properties. The susceptibility tensor of doublewalled carbon nanotubes of the "armchair" type the ABAB packing of layers is investigated theoretically in the weak and strong correlation regime. We calculated the spin and charge susceptibility tensor for of the (5,5)@(10,10) double-walled carbon nanotubes using the random-phase approximation in the weak correlation regime. The relationship with the Heisenberg limit (large U/t) is discussed. Our results show that the susceptibility spectra of the (5,5)@(10,10) doublewalled carbon nanotubes shift peaks to lower energies with increase in the correlation parameter of the t-J model (U ≥ t). These results show that electronic correlation effects should be taken into account in theoretical studies of doublewalled carbon nanotubes. We discuss the relevance of our results for the C 20 and C 60 fullerens and (5,5) nanotubes.

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“…12 Due to the purpose of speci¯c scienti¯c studies or technological applications, various synthetic methods have been developed to produce the CNTs with desired properties. 11 The¯rst growth of high-quality and milligram quantities of MWNTs 13 and SWNTs 14,15 enabled intensive study of the intrinsic properties of CNTs.…”

mentioning

confidence: 99%

Chiral Carbon Nanotubes and Carbon Nanotube Chiral Composites: Preparation and Applications

Chen

Liao

et al. 2013

NANO

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A review of preparation of chiral carbon nanotubes (CNTs) and carbon nanotube chiral composites is presented. Novel chiral separation science and technology based on CNTs is analyzed and discussed, with the emphasis in two topics. The¯rst topic concerns the possibility of application of chiral CNTs in resolution and chiral sensing. The second topic centers on the subject of enantioseparation based on CNT chiral composites. Despite the crucial functionalization of CNTs using chiral selectors, better resolution could also be achieved by using a mixture of CNTs and optical pure substances as chiral selectors. Due to their ability of improving the degree of enantioseparation, CNTs could¯nd their potential applications in the resolution in the future.

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Chirality of internal metallic and semiconducting carbon nanotubes

Cited by 58 publications

References 27 publications

Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies

Identification of the constituents of double-walled carbon nanotubes using Raman spectra taken with different laser-excitation energies

Strong correlation effects in the (5,5)@(10,10) double-walled carbon nanotubes in the framework of the t–J model

Chiral Carbon Nanotubes and Carbon Nanotube Chiral Composites: Preparation and Applications

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