Probing the Intrinsic Vibrational and Optical Properties of Individual Chirality-Identified Carbon Nanotubes by Raman Spectroscopy

Michel, Thierry; Levshov, Dmitry; Zahab, Ahmed-Azmi; Sauvajol, Jean‐Louis; Paillet, Matthieu

doi:10.1142/9789813235465_0010

Cited by 4 publications

(17 citation statements)

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“…An average shift between the experimental and calculated transitions is estimated at about 370 meV. This 370 meV shift is in good agreement with the expected one resulting from the sum of a ≈430 meV blue shift due to many-body effects [16,52,58] and a ≈55 meV redshift related to dielectric screening [5,9] not included in the model. The excitonic nature of the transition vs. the single-particle approximation used for the calculations explain the different lineshape of the peaks which is symmetric in the experimental spectrum and asymmetric in the theoretical one.…”

Section: Absorption Spectrum Of (1612)@(2710) Dwntsupporting

confidence: 82%

“…S3 shows the results of the calculation in an extended energy range). On the same figures the calculation of the absorption coefficient for non-interacting (16,12) and (27,10) SWNTs ((16,12)+(27,10), blue dotted curve in Fig. 1b and Fig.…”

Section: Absorption Spectrum Of (1612)@(2710) Dwntmentioning

confidence: 81%

“…Raman spectroscopy gives unique information on the features of the radial breathing-like modes (RBLMs) and G-modes in DWNTs; especially the REP of each mode gives information about its main origin: inner or outer tubes vibrations, and permits to evidence and to quantify the coupling between the layers [4,6,10,15,16,49].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…DWNTs possess a unique two-layer coaxial structure consisting of two nested single-walled carbon nanotubes (SWNTs) bound together by weak van der Waals interactions. Indeed the electronic, mechanical, optical and vibrational properties of DWNTs are not only inherited from their SWNTs building blocks but also result from interlayer interactions [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, such approaches have been used to explore the properties of individual well-identified DWNTs. It was experimentally established that electronic [8,9,17] and vibrational [4,6,7,10,12,15,16] properties differ from those of their constituent SWNTs due to interlayer coupling effects. Concerning the electronic and optical properties a pioneer work [9] has put in evidence a one-to-one correspondence between the optical transitions of the DWNTs and those from the constituents SWNTs, but the transition energies are always shifted varying from a redshift of about 190 meV to a blueshift of 50 meV in different incommensurate DWNT species.…”

Section: Introductionmentioning

confidence: 99%

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Optically active cross-band transition in double-walled carbon nanotube and its impact on Raman resonances

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Section: Absorption Spectrum Of (1612)@(2710) Dwntsupporting

confidence: 82%

Section: Absorption Spectrum Of (1612)@(2710) Dwntmentioning

confidence: 81%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optically active cross-band transition in double-walled carbon nanotube and its impact on Raman resonances

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Role of Mechanical van der Waals Coupling in the G-Band Splitting of Individual Multiwall Carbon Nanotubes

et al. 2022

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Characterization of multiwalled carbon nanotubes (MWCNT) by Raman spectroscopy is challenging due to their structural complexity, inhomogeneity, and complicated interlayer van der Waals (vdW) interactions. These latter effects can be however well investigated in individual MWCNTs, prepared by the on-chip purification of arc-discharge (AD) MWCNT powder, combining atomic force microscopy, polarized Raman imaging, and spectroscopy. In this work, we reveal the inhomogeneity of the Raman signal from individual AD-MWCNTs and attribute it to the extraction of inner layers during the sonication stage of the dispersion procedure. We report the splitting of the Raman-active G-band, describing it in terms of the variation of interlayer mechanical vdW coupling as a function of diameter and interlayer distance in the probed AD-MWCNTs. Finally, we present a practical method for investigating the polarization behavior of MWCNTs with a nonuniform Raman response based on Raman mapping and advanced data fitting. Our work gives additional insights into the characterization of structurally nonuniform MWCNTs and allows distinguishing between these MWCNTs and 1D moiré crystals based on collapsed SWCNTs or studying telescopic 1D vdW heterostructures with Raman spectroscopy.

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Efficient Inner-to-Outer Wall Energy Transfer in Highly Pure Double-Wall Carbon Nanotubes Revealed by Detailed Spectroscopy

et al. 2022

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The coaxial stacking of two single-wall carbon nanotubes (SWCNTs) into a double-wall carbon nanotube (DWCNT), forming a so-called one-dimensional van der Waals structure, leads to synergetic effects that dramatically affect the optical and electronic properties of both layers. In this work, we explore these effects in purified DWCNT samples by combining absorption, wavelength-dependent infrared fluorescence−excitation (PLE), and wavelength-dependent resonant Raman scattering (RRS) spectroscopy. Purified DWCNTs are obtained by careful solubilization that strictly avoids ultrasonication or by electronic-type sorting, both followed by a density gradient ultracentrifugation to remove unwanted SWCNTs that could obscure the DWCNT characterization. Chirality-dependent shifts of the radial breathing mode vibrational frequencies and transition energies of the inner and outer DWCNT walls with respect to their SWCNT analogues are determined by advanced two-dimensional fitting of RRS and PLE data of DWCNT and their reference SWCNT samples. This exhaustive data set verifies that fluorescence from the inner DWCNT walls of wellpurified samples is severely quenched through efficient energy transfer from the inner to the outer DWCNT walls. Combined analysis of the PLE and RRS results further reveals that this transfer is dependent on the inner and outer wall chirality, and we identify the specific combinations dominant in our DWCNT samples. These obtained results demonstrate the necessity and value of a combined structural characterization approach including PLE and RRS spectroscopy for bulk DWCNT samples.

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Probing the Intrinsic Vibrational and Optical Properties of Individual Chirality-Identified Carbon Nanotubes by Raman Spectroscopy

Cited by 4 publications

References 0 publications

Optically active cross-band transition in double-walled carbon nanotube and its impact on Raman resonances

Optically active cross-band transition in double-walled carbon nanotube and its impact on Raman resonances

Role of Mechanical van der Waals Coupling in the G-Band Splitting of Individual Multiwall Carbon Nanotubes

Efficient Inner-to-Outer Wall Energy Transfer in Highly Pure Double-Wall Carbon Nanotubes Revealed by Detailed Spectroscopy

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