Collapsed carbon nanotubes as building blocks for high-performance thermal materials

Al-Ghalith, Jihong; Xu, Hao; Dumitrică, Traian

doi:10.1103/physrevmaterials.1.056001

Cited by 14 publications

(22 citation statements)

References 43 publications

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“…Such a high thermal conductivity is attributed to the large phonon mean free path of CNTs. Using nonequilibrium molecular dynamics (MD), Al‐Ghalith et al recently compared the thermal transport of cylindrical and collapsed CNTs. Figure a,b describes the setup applied for the κ calculations.…”

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

“…SWNT exhibits strong ballistic behavior over sub‐micrometer length scales . Figure d (filled symbols) presents the calculated κ for a circular (50, 50) SWNT as a function of tube length . The initial linear increase indicates a pure ballistic behavior, i.e., phonons propagate without being scattered.…”

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

“…Although the κ of collapsed CNTs is slightly lower than that of cylindrical CNTs, when they are tightly packed, the interfacial thermal resistance between collapsed CNTs (9.69 × 10 9 K W −1 ) is much smaller than that between cylindrical CNTs (2.38 × 10 10 K W −1 ). The small interfacial thermal resistance is owing to the larger number of carbon atoms in effective vdW contact between collapsed CNTs (Figure c) . Therefore, aligned, long CNTs in stacked, collapsed architectures are promising for efficient heat transport in lightweight composite materials.…”

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

“…Consequently, the stacked architecture of long, collapsed CNTs could provide unidirectional thermal highways in lightweight functional composite material. Such CEGNRs thus would be applied as basic building blocks in high performance thermal materials …”

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

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Advance in Close‐Edged Graphene Nanoribbon: Property Investigation and Structure Fabrication

Dong

Wang

et al. 2019

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The absence of dangling bonds in close‐edged graphene nanoribbons (CEGNRs) confers upon them a series of fascinating properties, especially when compared with cylindrical carbon nanotubes and open‐edged GNRs. Here, the configuration of CEGNRs is described, followed by the structure‐related properties, including mechanical, thermal, electrical, optical, and magnetic properties. Based on the unique structures and extraordinary properties, their potential applications in a variety of fields, such as field‐effect transistors, energy suppliers, nanoactuators, and fibers, are discussed. Remarkably, the strategies applied for generating CEGNRs, mainly from the collapse of carbon nanotubes and graphene tubes, are depicted in detail. Finally, the prospects in the research area of CEGNRs are proposed.

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Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

Section: Fundamentals Of Cegnrsmentioning

confidence: 99%

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Advance in Close‐Edged Graphene Nanoribbon: Property Investigation and Structure Fabrication

Dong

Wang

et al. 2019

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Carbon‐Nanotube‐Based Electrical Conductors: Fabrication, Optimization, and Applications

Zhang

Nguyen

Leonhardt

et al. 2019

Adv Elect Materials

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and environmentally friendly conductive cables or wires as a replacement for copper. From this view, carbon-based nanomaterial is a potential candidate.Carbon related nanomaterials including fullerenes, carbon nanotubes (CNTs), and graphene are promising due to their exceptional conductive and electronic transport properties, which may accelerate the practical and potential applications for various kinds of novel engineering areas spanning from electronics, energy storage, and advanced materials to nanotechnology and biotechnology. Among the family of carbon nanomaterials, CNTs have been a particularly attractive material since its discovery in 1991 by Iijima, [1] due to their nanoscale 1D shape, excellent mechanical properties, tunable electrical properties either metallic or semiconducting, high current carrying capacity, and many other exciting properties. These properties have highlighted the potential of CNTs use in a plethora of applications, including electrically conductive fillers in polymer composites, flexible and transparent conductive films, microelectronics (transistors, interconnectors, heat dissipaters), and lightweight conducting wires and cables. [2] Figure 1 points out the forecast presented by Endo et al. [3] on the present, near future, and long term applications of CNTs in various fields. An interesting potential application of CNTs is the long-term electrical conductors, which are able to transmit power from plants to plants or households, as well as be used in electronic devices.Compared to conventional copper cables or wires, CNT based cables have several advantages including 1) a lower density of 1.3 g cm −3 for single-walled carbon nanotubes (SWCNTs) [4] and 2.1 g cm −3 for multiwalled carbon nanotubes (MWCNTs), [5] both of which are much lower than that of copper, 8.96 g cm −3 ; [6] 2) environmental stability, which can stand with severe conditions including high pressure, large temperature changes, etc.; 3) excellent mechanical performance with a Young's modulus and strength in the ranges of 1.0 TPa and 50 GPa, respectively; [7] 4) ultrahigh electrical conductivity as high as 10 8 S m −1 for SWCNTs, which is higher than that of copper (≈10 7 S m −1 )). [8] Furthermore, the limited amount of conventional conductive metal resources in nature and their soaring market price greatly increased the need for a desirable alternative solution that are abundant in nature, low-cost, andThe lack of progress to obtain commercially available large-scale production of continuous carbon nanotube (CNT) fibers has provided the motivation for researchers to develop high-performance bulk CNT assemblies that could more effectively transfer the superb mechanical, electrical, and other excellent properties of individual CNTs. These wire-like bulk assemblies of CNTs have demonstrated the potential for being used as electrical conductors to replace conventional conductive materials, such as copper and aluminum. CNT conductors are extremely lightweight, corrosive-resistive, and mechanically strong while being ...

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On the Mechanical Properties of Popgraphene‐Based Nanotubes: a Reactive Molecular Dynamics Study

et al. 2021

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Carbon‐based tubular materials have sparked a great interest in future electronics and optoelectronics device applications. In this work, we computationally studied the mechanical properties of nanotubes generated from popgraphene (PopNTs). Popgraphene is a 2D carbon allotrope composed of 5‐8‐5 rings. We carried out fully atomistic reactive (ReaxFF) molecular dynamics for PopNTs of different chiralities (()n,0 and ()0,n ) and/or diameters and at different temperatures (from 300 up to 1200 K). Results showed that the tubes are thermally stable (at least up to 1200 K). All tubes presented stress/strain curves with a quasi‐linear behavior followed by an abrupt drop of stress values. Interestingly, armchair‐like PopNTs (()0,n ) can stand a higher strain load before fracturing when contrasted to the zigzag‐like ones (()n,0 ). Moreover, it was obtained that Young's modulus (YMod) (750–900 GPa) and ultimate strength (σUS) (120–150 GPa) values are similar to the ones reported for conventional armchair and zigzag carbon nanotubes. YMod values obtained for PopNTs are not significantly temperature‐dependent. While the σUS values for the ()0,n showed a quasi‐linear dependence with the temperature, the ()n,0 exhibited no clear trends.

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Collapsed carbon nanotubes as building blocks for high-performance thermal materials

Cited by 14 publications

References 43 publications

Advance in Close‐Edged Graphene Nanoribbon: Property Investigation and Structure Fabrication

Advance in Close‐Edged Graphene Nanoribbon: Property Investigation and Structure Fabrication

Carbon‐Nanotube‐Based Electrical Conductors: Fabrication, Optimization, and Applications

On the Mechanical Properties of Popgraphene‐Based Nanotubes: a Reactive Molecular Dynamics Study

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