Chirality manifestation in elastic coupling between the layers of double-walled carbon nanotubes

Rochal, S.B.; Levshov, Dmitry; Avramenko, Marina; Arenal, Raúl; Cao, Thi Thanh; Nguyen, Van Lap; Sauvajol, Jean‐Louis; Paillet, Matthieu

doi:10.1039/c9nr03853a

Cited by 11 publications

(23 citation statements)

References 76 publications

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“…Consequently, heterohelical combinations of (P)/(M) and (M)/(P) were preferred over homohelical combinations of (P)/(P) and (M)/(M), and an enthalpic origin for the discrimination was quantitatively disclosed. This result may prompt reconsiderations of previous proposals of homohelical preferences for infinite i-DWNTs [29][30][31] . Spectral changes were noted upon formation of the i-DWNT complex ( Supplementary Fig.…”

Section: Discussionmentioning

confidence: 87%

“…The ITC result was also important to clarify that the enthalpic difference (ΔΔH) of incommensurate carbon bilayers with diastereomeric orientations can be as large as 1 kcal mol −1 even for short, finite cylindrical molecules. In previous studies of infinite i-DWNTs with transmission electron microscopy, tomographic analyses led to the proposal that homohelical CNT combinations were energetically preferred over heterohelical combinations 29,30 . This previous proposal contradicts the present quantitative thermodynamic data of i-DWNT segments, and two explanations might be possible: (1) the stereoselectivity of i-DWNT formation may be kinetically determined, which may prefer homohelical combinations, and (2) the proposal made for the 16 i-DWNT specimens was not statistically sufficient.…”

Section: Stereoselective Spontaneous Assembly Of the I-dwnt Complexmentioning

confidence: 99%

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Stereoselectivity in spontaneous assembly of rolled incommensurate carbon bilayers

et al. 2021

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The periodicity of two-dimensional entities can be manipulated by their stacking assembly, and incommensurate stacks of bilayers are attracting considerable interest in materials science. Stereoisomerism in incommensurate bilayers was first noted with incommensurate double-wall carbon nanotubes composed of helical carbon networks, but the lack of structural information hampered the chemical understanding such as the stereoselectivity during bilayer formation. In this study, we construct a finite molecular version of incommensurate carbon bilayers by assembling two helical cylindrical molecules in solution. An outer cylindrical molecule is designed to encapsulate a small-bore helical cylindrical molecule, and the spontaneous assembly of coaxial complexes proceeds in a stereoselective manner in solution with a preference for heterohelical combinations over diastereomeric, homohelical combinations. The rational design of incommensurate bilayers for material applications may be facilitated by the design and development of molecular versions with discrete structures with atomic precision.

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Section: Discussionmentioning

confidence: 87%

Section: Stereoselective Spontaneous Assembly Of the I-dwnt Complexmentioning

confidence: 99%

Stereoselectivity in spontaneous assembly of rolled incommensurate carbon bilayers

et al. 2021

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“…Another problem was raised in 2017 by Ghedjatti et al, who hypothesized that the formation of specific DWCNTs with Δθ ≈ 0° and Δθ > 25° (regions I and II in Figure 2c, respectively) is forbidden due to the mechanical vdW coupling. [25] However, later independent studies by He et al [43] and Rochal et al [42] demonstrated that these geometrical configurations do exist.…”

Section: And the Interlayer Twist Anglementioning

confidence: 99%

“…The latter corresponds to any inner-outer SWCNT pairs falling within an outer dia meter range of 1.0 < D out < 5.0 nm and an interlayer distance range of 0.30 < Δr < 0.40 nm (blue bars and colored dots in Figures 2b,c, respectively), where the ranges of D out and Δr correspond to the limits of the experimental distributions. [42] The interlayer distance Δr in naturally grown DWCNTs is distributed mainly between 0.30 and 0.40 nm with a peak value at around 0.34-0.35 nm (Figure 2b, top panel). It contrasts with the constant Δr distribution for the set of all geometrically possible DWCNT combinations (blue bars in Figure 2b).…”

Section: And the Interlayer Twist Anglementioning

confidence: 99%

“…The analysis of the statistical distributions of structural parameters for naturally grown DWCNTs highlights the role of vdW coupling in the stability and energetics of the heterostructures. As an illustration, we review here 335 DWCNTs from literatures, synthesized by chemical vapor deposition (CVD), arc-discharge, and peapod conversion techniques (red bars and black dots in Figure 2b,c, respectively) and unambiguously characterized by electron diffraction (ED) or highresolution TEM (HRTEM) (statistics are based on the overview paper, [42] which holds most references but with several additional DWCNTs [22,43,48] ). We compare the experimental statistics with the calculated set of all geometrically possible DWCNTs.…”

Section: And the Interlayer Twist Anglementioning

confidence: 99%

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Nanotube‐Based 1D Heterostructures Coupled by van der Waals Forces

Cambré

Liu

Levshov

et al. 2021

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1D van der Waals heterostructures based on carbon nanotube templates are raising a lot of excitement due to the possibility of creating new optical and electronic properties, by either confining molecules inside their hollow core or by adding layers on the outside of the nanotube. In contrast to their 2D analogs, where the number of layers, atomic type and relative orientation of the constituting layers are the main parameters defining physical properties, 1D heterostructures provide an additional degree of freedom, i.e., their specific diameter and chiral structure, for engineering their characteristics. The current state-of-the-art in synthesizing 1D heterostructures are discussed here, in particular focusing on their resulting optical properties, and details the vast parameter space that can be used to design heterostructures with custombuilt properties that can be integrated into a large variety of applications. First, the effects of van der Waals coupling on the properties of the simplest and best-studied 1D heterostructure, namely a double-walled carbon nanotube, are described, and then heterostructures built from the inside and the outside are considered, which all use a nanotube as a template, and, finally, an outlook is provided for the future of this research field.

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Efficient Growth of 1D Van der Waals Heterostructures on Zeolite‐Supported SWCNTs

Zhang,

Levshov,

Otsuka

et al. 2024

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The controlled synthesis of 1D van der Waals (1D vdW) heterostructures, specifically single‐walled carbon nanotubes encapsulated within boron nitride nanotubes (SWCNT@BNNT), presents a challenge due to an incomplete understanding of the factors influencing BNNT growth. This study investigates the growth yield of SWCNT@BNNT heterostructures produced using zeolite‐supported SWCNT templates on SiO2‐coated Transmission Electron Microscopy (TEM) grids, which enable in situ synthesis and thorough evaluation of each step without compromising the nanotube structure. The high‐resolution TEM analysis reveals a significant improvement in BNNT coverage on individual nanotubes, increasing from 9% to 42%, through optimization of the ammonia borane precursor amount. A thorough comparison of BNNT growth efficiency is performed using zeolite‐supported SWCNT templates against the current benchmark of free‐standing SWCNT films, highlighting comparable synthesis yields despite different morphologies and SWCNT diameter distributions. By integrating all Raman and TEM data from the studied SWCNT@BNNT samples, a correlation between BNNT coverage and the intensity of the buckling R‐mode of BNNTs is established, providing a reliable criterion for evaluating BNNT growth efficiency in 1D vdW heterostructures. This work advances the understanding and characterization of 1D vdW heterostructures, offering insights into synthesizing hetero‐nanotubes using other types of SWCNT templates and paving the way for their diverse applications.

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Chirality manifestation in elastic coupling between the layers of double-walled carbon nanotubes

Abstract: Most likely, both layers in double-walled carbon nanotubes have the same handedness.

Cited by 11 publications

References 76 publications

Stereoselectivity in spontaneous assembly of rolled incommensurate carbon bilayers

Stereoselectivity in spontaneous assembly of rolled incommensurate carbon bilayers

Nanotube‐Based 1D Heterostructures Coupled by van der Waals Forces

Efficient Growth of 1D Van der Waals Heterostructures on Zeolite‐Supported SWCNTs

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