Thermal conductivity of graphite in the basal plane

Klemens, P. G.; Pedraza, D. F.

doi:10.1016/0008-6223(94)90096-5

Cited by 352 publications

(294 citation statements)

References 8 publications

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“…S14) 32 , consistent with calculations on carbon nanotube heating 33 . Crucially, thermal conduction in graphene occurs via efficient phonon modes and a small contribution from free electrons 34,35 . Under continual irradiation there may be some depletion of electrons within the irradiated area, due to their involvement in thermal conduction, that could weaken the sp 2 bonds and lower the threshold for sputtering.…”

Section: Discussionmentioning

confidence: 99%

Spatial control of defect creation in graphene at the nanoscale

et al. 2012

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Defects in graphene alter its electrical, chemical, magnetic and mechanical properties. The intentional creation of defects in graphene offers a means for engineering its properties. Techniques such as ion irradiation intentionally induce atomic defects in graphene, for example, divacancies, but these defects are randomly scattered over large distances. Control of defect formation with nanoscale precision remains a significant challenge. Here we show control over both the location and average complexity of defect formation in graphene by tailoring its exposure to a focussed electron beam. Divacancies and larger disordered structures are produced within a 10×10 nm 2 region of graphene and imaged after creation using an aberrationcorrected transmission electron microscope. some of the created defects were stable, whereas others relaxed to simpler structures through bond rotations and surface adatom incorporation. These results are important for the utilization of atomic defects in graphene-based research.

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Section: Discussionmentioning

confidence: 99%

Spatial control of defect creation in graphene at the nanoscale

et al. 2012

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“…In these papers, Klemens assumed that the phonon transport in graphite is essentially 2D-like for all phonon contribution of low-frequency, i.e. long wavelength, 3D phonons to the in-plane thermal conductivity of graphite was assumed to be negligible [34][35]. The physical reasoning was that these phonons will experience stronger scattering due to the inter-layer coupling and will not have long MFP.…”

Section: Context Imagementioning

confidence: 99%

Anomalous Size Dependence of the Thermal Conductivity of Graphene Ribbons

2012

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We investigated the thermal conductivity K of graphene ribbons and graphite slabs as the function of their lateral dimensions. Our theoretical model considered the anharmonic three-phonon processes to the second-order and included the angle-dependent phonon scattering from the ribbon edges. It was found that the long mean free path of the longwavelength acoustic phonons in graphene can lead to an unusual non-monotonic dependence of the thermal conductivity on the length L of a ribbon. The effect is pronounced for the ribbons with the smooth edges (specularity parameter p>0.5). Our results also suggest that -contrary to what was previously thought -the bulk-like 3D phonons in graphite can make a rather substantial contribution to its in-plane thermal conductivity. The Umklapp-limited thermal conductivity of graphite slabs scales, for L below ~ 10 m, as log(L) while for larger L, the thermal conductivity approaches a finite value following the dependence K 0 -A×L -1/2 , where K 0 and A are parameters independent of the length. Our theoretical results clarify the scaling of the phonon thermal conductivity with the lateral sizes in graphene and graphite. The revealed anomalous dependence K(L) for the micrometer-size graphene ribbons can account for some of the discrepancy in reported experimental data for graphene.

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“…À2 , B ¼ 3:35 Â 10 23 m K s À2 [25]. Despite its very crude character, this approximation is able to correctly describe the transition from ballistic to diffusive phonon transport in defect free CNTs [26].…”

Section: -2mentioning

confidence: 99%

Phonon Transport in Isotope-Disordered Carbon and Boron-Nitride Nanotubes: Is Localization Observable?

2008

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We present an ab initio study which identifies dominant effects leading to thermal conductivity reductions in carbon and boron-nitride nanotubes with isotope disorder. Our analysis reveals that, contrary to previous speculations, localization effects cannot be observed in the thermal conductivity measurements. Observable reduction of the thermal conductivity is mostly due to diffusive scattering. Multiple scattering induced interference effects were found to be prominent for isotope concentrations *10%; otherwise, the thermal conduction is mainly determined by independent scattering contributions of single isotopes. We give explicit predictions of the effect of isotope disorder on nanotube thermal conductivity that can be directly compared with experiments.

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Thermal conductivity of graphite in the basal plane

Cited by 352 publications

References 8 publications

Spatial control of defect creation in graphene at the nanoscale

Spatial control of defect creation in graphene at the nanoscale

Anomalous Size Dependence of the Thermal Conductivity of Graphene Ribbons

Phonon Transport in Isotope-Disordered Carbon and Boron-Nitride Nanotubes: Is Localization Observable?

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