Behavior of the high frequency Raman modes of double-wall carbon nanotubes after doping with bromine or iodine vapors

Nascimento, Gustavo M. do; Hou, Taige; Kim, Yoong Ahm; Muramatsu, Hiroyuki; Hayashi, T.; Endo, Morinobu; Akuzawa, Noboru; Dresselhaus, M. S.

doi:10.1016/j.carbon.2011.04.061

Cited by 21 publications

(25 citation statements)

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“…At this point, it is important to remember that the RBMs of the inner nanotubes from bundled DWNTs consist of clusters of narrow peaks in comparison to the single-peak characteristics of bundled SWNTs [34]. Several Raman studies have discussed the G bands of bundled DWNTs, for example, the frequency shifts and intensity changes associated with the ω G dependence on E laser , as well as on the growth method or the amount of dopants [22,[35][36][37][38][39]. The present work brings out a new discussion of the annealing temperature dependence of the G band for DWNTs.…”

Section: A Bundled Double-walled Carbon Nanotubesmentioning

confidence: 99%

G′band in double- and triple-walled carbon nanotubes: A Raman study

et al. 2015

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Double-and triple-walled carbon nanotubes are studied in detail by laser energy-dependent Raman spectroscopy in order to get a deeper understanding about the second-order G band Raman process, general nanotube properties, such as electronic and vibrational properties, and the growth method itself. In this work, the inner nanotubes from the double-and triple-walled carbon nanotubes are produced through the encapsulation of fullerene peapods with high-temperature thermal treatments. We find that the spectral features of the G band, such as the intensity, frequency, linewidth, and line shape are highly sensitive to the annealing temperature variations. We also discuss the triple-peak structure of the G band observed in an individual triple-walled carbon nanotube taken at several laser energies connecting its Raman spectra with that for the G band spectra obtained for bundled triple-walled carbon nanotubes.

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Section: A Bundled Double-walled Carbon Nanotubesmentioning

confidence: 99%

G′band in double- and triple-walled carbon nanotubes: A Raman study

et al. 2015

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“…The small observed G band shifts could have other origins besides stress, such as a downshift from the creation of sp 3 bonds [29], or an up-shift and down-shift could be correlated with acceptor or donor dopants, respectively [30]. More experimental work is needed to explore the G-band's relationship with functionalization and doping, such as those conducted in recent works by other researchers [31,32].…”

Section: Functionalizationmentioning

confidence: 89%

Ex-situRaman spectroscopy to optimize the manufacturing process for a structural MWNT nanocomposite

Freihofer

Liang

Botsa

et al. 2012

International Journal of Smart and Nano Materials

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The G and D doublet, an intrinsic Raman feature of multi-walled nanotubes (MWNTs), was monitored in an ex-situ fashion for all intermediate stages of a manufacturing process of a MWNT/polymer nanocomposite. The G peak position and D/G ratios were monitored to characterize the changes in load transfer and disorder, respectively, of the MWNTs. Differences in Raman characteristics desired during the manufacturing process for different structural applications are discussed. Techniques are presented that could optimize any manufacturing parameters for pressurized filtration and resin infusion using the G position and D/G integrated intensity ratio. Similar Raman control techniques could be applied to any intermediate phase of a manufacturing process to develop enhanced novel carbon nanotube composites for structural applications.

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“…For all samples investigated, the resonance Raman spectra are dominated by SWCNT or DWCNT bands at different laser excitation energies (E laser ) [37][38][39]. The Raman spectra obtained with laser lines from 790 to 514.5 nm (E laser from 1.57 to 2.41 eV) are dominated by the characteristic bands from the SWCNTs or DWCNTs.…”

Section: Resonance Raman Of Modified Single-and Double-walled Carbon mentioning

confidence: 95%

“…Through the years, the infrared and Raman spectroscopies have been the techniques par excellence for the investigation of the vibrational structure of conjugated materials, such as dyes [25], metallic complexes [26][27][28], conducting polymers [29,30], nanocomposites [31][32][33], and carbon allotropes [34][35][36][37][38][39]. The laser is the common source in Raman spectroscopy, the radiation interacts with the sample through the scattering process.…”

Section: Raman Spectroscopy and Imagingmentioning

confidence: 99%

“…The resonance Raman spectroscopy technique is sensitive to the electronic, structural, and vibrational properties of CNTs. Our group is using resonance Raman spectroscopy to characterize the interactions between nanotubes and different kinds of molecules [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39], such as the conducting polyaniline (PANI), molecular magnets such as (NBu 4 ) 2 [Cu(opba)], [MnCu(opba)] n chains, where opba = ortho-phenylenebis(oxamate), dyes such as phenosafranine (PS) and Nile Blue (NB), and CNTs doped with bromine or iodine.…”

Section: Resonance Raman Of Modified Single-and Double-walled Carbon mentioning

confidence: 99%

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Raman Spectroscopy and Imaging of Carbon Allotropes

Nascimento¹

2020

Modern Spectroscopic Techniques and Applications

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Raman spectroscopy is employed to study a myriad of complex materials due to the coupling of different resonances process and microscopic resources. For instance, vibrational and electronic aspects of carbon allotropes can be deeply investigated by resonance Raman spectroscopy. By selecting the appropriate laser line, it is possible to monitor different aspects of the samples, such as the behavior of metallic or semiconducting tubes and the graphene with different layers or chemical modifications. In this chapter, the potentialities of Raman technique will be exemplified in some examples obtained in our group about the characterization of carbon nanotubes and graphene. For instance, the doping process of nanotubes, carbon tube interactions with molecular magnets, and inhomogeneity of graphene samples will be discussed.

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Behavior of the high frequency Raman modes of double-wall carbon nanotubes after doping with bromine or iodine vapors

Cited by 21 publications

References 36 publications

G′band in double- and triple-walled carbon nanotubes: A Raman study

G′band in double- and triple-walled carbon nanotubes: A Raman study

Ex-situRaman spectroscopy to optimize the manufacturing process for a structural MWNT nanocomposite

Raman Spectroscopy and Imaging of Carbon Allotropes

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