A study on the bending stiffness of single-walled carbon nanotubes and related issues

Gao, Xu; Zhang, Teng

doi:10.1016/j.jmps.2009.11.001

Cited by 21 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, D 0 denotes nanotube diameter. It is noted that our results are in good agreement with those recently obtained by the combined use of the molecular mechanics model and the deformation mapping technique (Guo and Zhang, 2010). Our bending stiffness value for CNT (5,5) of 236.2 eV nm, also agrees reasonably well with the value of 227.3 eV nm which was obtained by DiBiasio et al (2007) also using atomistic simulations.…”

Section: Bending Stiffness Of Cntssupporting

confidence: 91%

“…Although numerous efforts have already been made to investigate the elastic properties of CNTs, studies showed that there are large discrepancies in the predicted Young's modulus, as well as the wall thickness of CNTs (Yakobson et al, 1996;Lu, 1997;Chang and Gao, 2003;Pantano et al, 2004;Huang et al, 2006;DiBiasio et al, 2007;Batra and Gupta, 2008;Guo and Zhang, 2010). In this paper, what we need to know is the bending stiffness of the CNTs instead of the Young's modulus and wall thickness individually.…”

Section: Bending Stiffness Of Cntsmentioning

confidence: 96%

See 1 more Smart Citation

Analysis of the entanglements in carbon nanotube fibers using a self-folded nanotube model

Chou

2011

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

Section: Bending Stiffness Of Cntssupporting

confidence: 91%

Section: Bending Stiffness Of Cntsmentioning

confidence: 96%

Analysis of the entanglements in carbon nanotube fibers using a self-folded nanotube model

Chou

2011

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

“…Because of the curvature difference of 1D CNTs and 2D graphene and orientation setup of these two CNTs, a slight local deformation in the 2D graphene at the heterojunction is observed at the equilibrium. Generally, this local mechanical deformation depends on the bending stiffness of CNTs and 2D materials . A smaller bending stiffness of 2D layers or a large bending stiffness of CNTs will lead to a stronger atomic interaction in the heterojunction and thus a larger deformation in 2D materials.…”

Section: Resultsmentioning

confidence: 99%

On the Generalized Thermal Conductance Characterizations of Mixed One-Dimensional–Two-Dimensional van der Waals Heterostructures and Their Implication for Pressure Sensors

Gao

2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The emergence of ever-growing two-dimensional (2D) materials has made revolutionary innovations on van der Waals (vdW) heterostructural designs by integrating them with other low-dimensional materials to achieve unprecedented and/or multiple functionalities that are beyond individual components. Guided by full-scale molecular dynamics simulations, we present a mixed-dimensional heterostructure by vertically stacking one-dimensional (1D) and 2D materials through noncovalent vdW interactions and demonstrate that the thermal conductance can be generalized into a unified model by incorporating their mechanical properties and geometric features. Simulation analyses further reveal the strong dependence of thermal conductance on the location and magnitude of an external pressure loading applied to the local vdW heterojunctions. The underlying thermal transport mechanism is uncovered through the elucidation of the mechanical deformation, curvature morphology, and density of atomic interactions at the heterojunctions. A proof-of-conceptual design of such a heterostructure-enabled pressure sensor is explored by utilizing the unique response of thermal transport to mechanical deformation at heterojunctions. These designs and models are expected to broaden the applications and functionalities of mixed-dimensional heterostructures and will also offer an alternative strategy to leverage thermal transport mechanisms in the design of high-performance vdW heterostructure-enabled sensors.

show abstract

“…In contrast, the Young's modulus for AlSiNTs in bending tests slightly exceeded the values obtained in tensile tests, which may also be attributed to non-homogeneity and anisotropy caused by the essential discreteness of the model. 55 Shear modulus of AlSiNTs Fig. 4 summarizes the shear modulus of AlSiNTs and CNTs estimated from the simulated torsion tests.…”

Section: Resultsmentioning

confidence: 99%

Relationships among the structural topology, bond strength, and mechanical properties of single-walled aluminosilicate nanotubes

2015

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) are regarded as small but strong due to their nanoscale microstructure and high mechanical strength (Young's modulus exceeds 1000 GPa). A longstanding question has been whether there exist other nanotube materials with mechanical properties as good as those of CNTs. In this study, we investigated the mechanical properties of single-walled aluminosilicate nanotubes (AlSiNTs) using a multiscale computational method and then conducted a comparison with single-walled carbon nanotubes (SWCNTs). By comparing the potential energy estimated from molecular and macroscopic material mechanics, we were able to model the chemical bonds as beam elements for the nanoscale continuum modeling. This method allowed for simulated mechanical tests (tensile, bending, and torsion) with minimum computational resources for deducing their Young's modulus and shear modulus. The proposed approach also enabled the creation of hypothetical nanotubes to elucidate the relative contributions of bond strength and nanotube structural topology to overall nanotube mechanical strength. Our results indicated that it is the structural topology rather than bond strength that dominates the mechanical properties of the nanotubes. Finally, we investigated the relationship between the structural topology and the mechanical properties by analyzing the von Mises stress distribution in the nanotubes. The proposed methodology proved effective in rationalizing differences in the mechanical properties of AlSiNTs and SWCNTs. Furthermore, this approach could be applied to the exploration of new high-strength nanotube materials.

show abstract

A study on the bending stiffness of single-walled carbon nanotubes and related issues

Cited by 21 publications

References 35 publications

Analysis of the entanglements in carbon nanotube fibers using a self-folded nanotube model

Analysis of the entanglements in carbon nanotube fibers using a self-folded nanotube model

On the Generalized Thermal Conductance Characterizations of Mixed One-Dimensional–Two-Dimensional van der Waals Heterostructures and Their Implication for Pressure Sensors

Relationships among the structural topology, bond strength, and mechanical properties of single-walled aluminosilicate nanotubes

Contact Info

Product

Resources

About