Observations of the<i>D</i>-band feature in the Raman spectra of carbon nanotubes

Brown, S. R.; Jório, Ado; Dresselhaus, M. S.; Dresselhaus, G.

doi:10.1103/physrevb.64.073403

Cited by 213 publications

(140 citation statements)

References 19 publications

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“…A multi-peak structure (Zolyomi et al 2003) and an oscillatory dispersive behaviour (Brown et al 2001) has been observed for the D band in SWNT bundles. For isolated tubes, unusually sharp features can be seen in the D band with a full width half maximum (FWHM) intensity linewidth down to 7 cm −1 owing to quantum confinement effects.…”

Section: (A) the D Band In Swnt Bundlesmentioning

confidence: 99%

Defect characterization in graphene and carbon nanotubes using Raman spectroscopy

Dresselhaus

Jório

Filho

et al. 2010

Phil. Trans. R. Soc. A.

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630

444

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This review discusses advances that have been made in the study of defect-induced double-resonance processes in nanographite, graphene and carbon nanotubes, mostly coming from combining Raman spectroscopic experiments with microscopy studies and from the development of new theoretical models. The disorder-induced peak frequencies and intensities are discussed, with particular emphasis given to how the disorder-induced features evolve with increasing amounts of disorder. We address here two systems, ionbombarded graphene and nanographite, where disorder is represented by point defects and boundaries, respectively. Raman spectroscopy is used to study the 'atomic structure' of the defect, making it possible, for example, to distinguish between zigzag and armchair edges, based on selection rules of phonon scattering. Finally, a different concept is discussed, involving the effect that defects have on the lineshape of Raman-allowed peaks, owing to local electron and phonon energy renormalization. Such effects can be observed by near-field optical measurements on the G feature for doped single-walled carbon nanotubes.

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Section: (A) the D Band In Swnt Bundlesmentioning

confidence: 99%

Defect characterization in graphene and carbon nanotubes using Raman spectroscopy

Dresselhaus

Jório

Filho

et al. 2010

Phil. Trans. R. Soc. A.

Self Cite

630

444

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“…Their strong dispersive behavior has been largely discussed in the literature [12][13][14][15][16][17] and inter- preted as a double resonance process involving a laser-induced resonant transition of an electron from the valence to the conduction band of carbon materials. A scattered resonance can take place if the electron is scattered by a phonon to a real state and after an elastic scattering process by lattice defects, the electron relaxes to the valence band [26].…”

Section: Effect Of the Laser Excitation Energy On Thementioning

confidence: 99%

“…The diameter of nanotubes [9], the presence of disorder in sp 2 -hybridized carbon systems [10] as well as the effect of nanotube-nanotube interactions [11] on the vibrational modes have been assessed using Raman spectroscopy. Specific features such as the strong frequency dependence on the excitation laser energy of some Raman bands [12][13][14][15][16][17] or laser radiation-induced effects [18][19][20][21] have been the subject of extensive studies. Raman spectroscopy of CNT-based composite materials has been used to evaluate the state of dispersion and the polymer-filler interactions reflected, by shifts or width changes of the peaks.…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopic characterization of multiwall carbon nanotubes and of composites

Bokobza¹,

Zhang²

2012

Express Polym. Lett.

371

180

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Abstract. In this work Raman spectroscopy was used for extensive characterization of multiwall carbon nanotube (MWNTs) and of MWCNTs/rubber composites. We have measured the Raman spectra of bundled and dispersed multiwall carbon nanotubes. All the Raman bands of the carbon nanotubes are seen to shift to higher wavenumbers upon debundling on account of less intertube interactions. Effects of laser irradiation were also investigated. Strong effects are observed by changing the wavelength of the laser excitation. On the other hand, at a given excitation wavelength, changes on the Raman bands are observed by changing the laser power density due to sample heating during the measurement procedure.

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“…51 -54 Also, a dependence on the diameter of the SWCNTs is observed. 53,55 This behavior is interpreted as a double resonance process, 52,54 where not only one of the direct, k-conserving electronic transitions, but also the emission of the phonon is a resonant process. In contrast to single resonant Raman scattering, where only phonons around the center of the Brillouin zone (q D 0) are excited, the phonons that provoke the D-band exhibit a nonnegligible q vector.…”

Section: 21mentioning

confidence: 99%

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

Graupner

2007

J Raman Spectroscopy

304

229

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Raman spectroscopy is one of the most extensively employed methods for the characterization of carbon nanotubes. In this review article, an overview about Raman spectroscopy as a tool for the characterization of functionalized single-walled carbon nanotubes (SWCNTs) is given. First, the relevant Raman modes in SWCNTs are introduced. Then, in a phenomenological approach, the effects that are observed for the individual modes in the Raman spectra are compiled and discussed. It is shown that special care has to be taken in order to separate the effects of functionalization, which are specific to a subset of the SWCNTs (metallic/semiconducting or diameter dependent), from changes in sample morphology or doping effects.

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Observations of theD-band feature in the Raman spectra of carbon nanotubes

Cited by 213 publications

References 19 publications

Defect characterization in graphene and carbon nanotubes using Raman spectroscopy

Defect characterization in graphene and carbon nanotubes using Raman spectroscopy

Raman spectroscopic characterization of multiwall carbon nanotubes and of composites

Raman spectroscopy of covalently functionalized single‐wall carbon nanotubes

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