Manifestation of Structure of Electron Bands in Double-Resonant Raman Spectra of Single-Walled Carbon Nanotubes

Stubrov, Yurii; Nikolenko, A. S.; Gubanov, V. O.; Strelchuk, V. V.

doi:10.1186/s11671-015-1213-8

Cited by 38 publications

(18 citation statements)

References 17 publications

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“…Furthermore, a detailed analysis of the G band line shape indicated that it was split into G − and G + components, once again providing evidence for the single-walled character of the material ( Figure 3 b) [ 37 ]. The shape of the G − component can determine the type of SWCNTs in resonance [ 38 , 39 ]. In this case, the SWCNTs revealed substantial semiconducting character, which made them ideal for doping.…”

Section: Resultsmentioning

confidence: 99%

Effective Doping of Single-Walled Carbon Nanotubes with Polyethyleneimine

Rdest

Janas

2020

Materials

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More and more electrically conducting materials are required to sustain the technological progress of civilization. Faced with the performance limits of classical materials, the R&D community has put efforts into developing nanomaterials, which can offer sufficiently high operational parameters. In this work, single-walled carbon nanotubes (SWCNTs) were doped with polyethyleneimine (PEI) to create such material. The results show that it is most fruitful to combine these components at the synthesis stage of an SWCNT network from their dispersion. In this case, the electrical conductivity of the material is boosted from 249 ± 21 S/cm to 1301 ± 56 S/cm straightforwardly and effectively.

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Section: Resultsmentioning

confidence: 99%

Effective Doping of Single-Walled Carbon Nanotubes with Polyethyleneimine

Rdest

Janas

2020

Materials

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“…2 was caused by scattering by Brillouin zone center phonons, whereas the 2D-band (also referred to as G') has been observed when sp 2 carbons exist, and can be attributed to resonant Raman scattering processes. [52][53][54] The line shape and the relative intensity of the 2D-band can be used to determine the number and orientation of graphene layers in few-layered graphene samples (1-5 layers). 52 Indeed if the graphene is defect-free, the 2D-band is expected to have a high intensity and a sharp lineshape.…”

Section: Resultsmentioning

confidence: 99%

Superbat: battery-like supercapacitor utilized by graphene foam and zinc oxide (ZnO) electrodes induced by structural defects

et al. 2019

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“…Some special laser lines should be chosen to enhance the 2D band when the bandgap is open to the visible and even ultraviolet range, similar to that in carbon nanotubes. 216,217 Furthermore, for defect-containing graphene in stage 2, I(2D) gradually becomes weaker. I(2D) can even become invisible for heavily disordered graphene.…”

Section: Raman Spectra Of Defect-containing Graphene Flakesmentioning

confidence: 99%

Raman spectroscopy of graphene-based materials and its applications in related devices

et al. 2018

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Graphene-based materials exhibit remarkable electronic, optical, and mechanical properties, which has resulted in both high scientific interest and huge potential for a variety of applications. Furthermore, the family of graphene-based materials is growing because of developments in preparation methods. Raman spectroscopy is a versatile tool to identify and characterize the chemical and physical properties of these materials, both at the laboratory and mass-production scale. This technique is so important that most of the papers published concerning these materials contain at least one Raman spectrum. Thus, here, we systematically review the developments in Raman spectroscopy of graphene-based materials from both fundamental research and practical (i.e., device applications) perspectives. We describe the essential Raman scattering processes of the entire first- and second-order modes in intrinsic graphene. Furthermore, the shear, layer-breathing, G and 2D modes of multilayer graphene with different stacking orders are discussed. Techniques to determine the number of graphene layers, to probe resonance Raman spectra of monolayer and multilayer graphenes and to obtain Raman images of graphene-based materials are also presented. The extensive capabilities of Raman spectroscopy for the investigation of the fundamental properties of graphene under external perturbations are described, which have also been extended to other graphene-based materials, such as graphene quantum dots, carbon dots, graphene oxide, nanoribbons, chemical vapor deposition-grown and SiC epitaxially grown graphene flakes, composites, and graphene-based van der Waals heterostructures. These fundamental properties have been used to probe the states, effects, and mechanisms of graphene materials present in the related heterostructures and devices. We hope that this review will be beneficial in all the aspects of graphene investigations, from basic research to material synthesis and device applications.

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Manifestation of Structure of Electron Bands in Double-Resonant Raman Spectra of Single-Walled Carbon Nanotubes

Cited by 38 publications

References 17 publications

Effective Doping of Single-Walled Carbon Nanotubes with Polyethyleneimine

Effective Doping of Single-Walled Carbon Nanotubes with Polyethyleneimine

Superbat: battery-like supercapacitor utilized by graphene foam and zinc oxide (ZnO) electrodes induced by structural defects

Raman spectroscopy of graphene-based materials and its applications in related devices

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