Conductivity of multiwall carbon nanotubes: Role of multiple shells and defects

Stetter, A.; Vancea, Johann; Back, Christian

doi:10.1103/physrevb.82.115451

Cited by 15 publications

(8 citation statements)

References 109 publications

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“…The tunneling conductance can be measured for graphene in the way similar to the experiments for multiwall carbon nanotubes. 42,43 All these give us a cause for optimism that the proposed graphene-based electromechanical nanodynamometer will be implemented in the near future.…”

Section: Discussionmentioning

confidence: 99%

Graphene-Based Nanodynamometer

Poklonski¹,

Siahlo²,

Вырко³

et al. 2013

j comput theor nanosci

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A new concept of an electromechanical nanodynamometer based on the relative displacement of layers of bilayer graphene is proposed. In this nanodynamometer, force acting on one of the graphene layers causes the relative displacement of this layer and related change of conductance between the layers. Such a force can be determined by measurements of the tunneling conductance between the layers. Dependences of the interlayer interaction energy and the conductance between the graphene layers on their relative position are calculated within the first-principles approach corrected for van der Waals interactions and the Bardeen method, respectively. The characteristics of the nanodynamometer are determined and its possible applications are discussed.

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Section: Discussionmentioning

confidence: 99%

Graphene-Based Nanodynamometer

Poklonski¹,

Siahlo²,

Вырко³

et al. 2013

j comput theor nanosci

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“…Reportedly, g depends on the diameter (D) of MWNT. For example, g = (10 k) À1 /m for D ¼ 17 nm, 11) g = (1 k) À1 /m for D ¼ 24{29 nm 15) and g = (220 ) À1 / m for D ¼ 33 nm, 15) which indicates that g increases with D. This situation is explainable as follows. For D > 15{20 nm, polygonal cross sections have been observed.…”

Section: Intershell Conductancementioning

confidence: 90%

Temperature Dependent Resistance of Multi-Wall Carbon Nanotube

Kawabe¹,

Itaya²,

Hirahara³

et al. 2012

Jpn. J. Appl. Phys.

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This study investigates electron transport properties of a Joule heated multi-wall carbon nanotube at temperatures as high as about 2100 K. Results show that the electrical resistance is temperature-dependent. The temperature dependence of the resistance is inferred to originate from the temperature-dependent intrashell resistance and intershell conductance. The resistance variation was analyzed using a resistive transmission line model. Results well reproduced those obtained using a double shell conduction model where the electrons transport in the outermost shell and the second inner shell. #

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“…The selected tri-walled CNTs for this study were all 57 nm and composed of three coaxial armchair CNTs with chiralities (10,10), (15,15) and (20,20). The armchair CNTs were selected as those have higher thermal conductivity than other types of CNTs, i.e., zig-zag and chiral ones [44,45].…”

Section: Methodsmentioning

confidence: 99%

Thermal Conductivity of Metal-Coated Tri-Walled Carbon Nanotubes in the Presence of Vacancies-Molecular Dynamics Simulations

2019

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Variation in the thermal conductivity of a metal-coated tri-walled carbon nanotube (3WCNT), in the presence of vacancies, was studied using non-equilibrium molecular dynamics simulations. A Two-Temperature model was used to account for electronic contribution to heat transfer. For 3WCNT with 0.5% and 1% random vacancies, there was 76%, and 86% decrease in the thermal conductivity, respectively. In that order, an overall ~66% and ~140% increase in the thermal conductivity was recorded when 3 nm thick coating of metal (nickel) was deposited around the defective models. We have also explored the effects of tube specific and random vacancies on thermal conductivity of the 3WCNT. The changes in thermal conductivity have also been justified by the changes in vibrational density of states of the 3WCNT and the individual tubes. The results obtained can prove to be useful for countering the detrimental effects of vacancies in carbon nanotubes.

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Conductivity of multiwall carbon nanotubes: Role of multiple shells and defects

Cited by 15 publications

References 109 publications

Graphene-Based Nanodynamometer

Graphene-Based Nanodynamometer

Temperature Dependent Resistance of Multi-Wall Carbon Nanotube

Thermal Conductivity of Metal-Coated Tri-Walled Carbon Nanotubes in the Presence of Vacancies-Molecular Dynamics Simulations

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