Length, width and roughness dependent thermal conductivity of graphene nanoribbons

Sonvane, Yogesh; Gupta, Sanjeev K.; Raval, Pooja Y.; Lukačević, Igor; Thakor, P. B.

doi:10.1016/j.cplett.2015.05.036

Cited by 41 publications

(18 citation statements)

References 26 publications

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“…However, recent studies by Nissimagoudar et al [39] found that, ZA branch has significant influence in the thermal properties of graphene nanoribbons due to its quadratic dispersion. At the same time, Sonvane et al [37] believes that flexural phonons dominate the thermal conductivity of graphene with length and width smaller than one micron which is in agreement with our study.…”

Section: Length Dependence Of Thermal Conductivitysupporting

confidence: 82%

“…However, converged sampling of the low frequency acoustic flexural modes is required to accurately calculate the thermal conductivity of GNR in molecular dynamics simulation. In this case, our findings disagree with some literature specified in the micrometer range of length [37,38]. This might be due to poor sampling of phase space and poor ergodicity issues, i.e., lack of correspondence between the system's statistical average with the ensemble average.…”

Section: Length Dependence Of Thermal Conductivitycontrasting

confidence: 56%

“…The length of the GNR controls the phonon mean free path (MFP). With the increase in length, the acoustic phonons with longer wavelengths become available for heat transfer [37]. The phonon transport in graphene, for phonon cutoff frequencies including zero frequency, is two dimensional (2D).…”

Section: Length Dependence Of Thermal Conductivitymentioning

confidence: 99%

“…In case of narrower GNRs, the reduced edge-localized phonon effect is dominant with the increase of width leading to the increased thermal conductivity which is reflected in our study range. However, for a large enough width, more and more phonons will be activated with remarkably significant phonon's Umklapp effect and as a consequence, the thermal conductivity decreases with the increase of width of graphene nanoribbon [22,37,43]. Figure 9.…”

Section: Length Dependence Of Thermal Conductivitymentioning

confidence: 99%

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Equilibrium Molecular Dynamics (MD) Simulation Study of Thermal Conductivity of Graphene Nanoribbon: A Comparative Study on MD Potentials

et al. 2015

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The thermal conductivity of graphene nanoribbons (GNRs) has been investigated using equilibrium molecular dynamics (EMD) simulation based on Green-Kubo (GK) method to compare two interatomic potentials namely optimized Tersoff and 2nd generation Reactive Empirical Bond Order (REBO). Our comparative study includes the estimation of thermal conductivity as a function of temperature, length and width of GNR for both the potentials. The thermal conductivity of graphene nanoribbon decreases with the increase of temperature. Quantum correction has been introduced for thermal conductivity as a function of temperature to include quantum effect below Debye temperature. Our results show that for temperatures up to Debye temperature, thermal conductivity increases, attains its peak and then falls off monotonically. Thermal conductivity is found to decrease with the increasing length for optimized Tersoff potential. However, thermal conductivity has been reported to increase with length using 2nd generation REBO potential for the GNRs of same size. Thermal conductivity, for the specified range of width, demonstrates an increasing trend with the increase of width for both the concerned potentials. In comparison with 2nd generation REBO potential, optimized Tersoff potential demonstrates a better modeling of thermal Electronics 2015, 4 1110 conductivity as well as provides a more appropriate description of phonon thermal transport in graphene nanoribbon. Such comparative study would provide a good insight for the optimization of the thermal conductivity of graphene nanoribbons under diverse conditions.

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Section: Length Dependence Of Thermal Conductivitysupporting

confidence: 82%

Section: Length Dependence Of Thermal Conductivitycontrasting

confidence: 56%

Section: Length Dependence Of Thermal Conductivitymentioning

confidence: 99%

Section: Length Dependence Of Thermal Conductivitymentioning

confidence: 99%

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Equilibrium Molecular Dynamics (MD) Simulation Study of Thermal Conductivity of Graphene Nanoribbon: A Comparative Study on MD Potentials

et al. 2015

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“…For comparatively narrow STNRs which is the case of our study, the lowering of boundary scattering effect in wider ribbon is more dominant than the intensied Umklapp scattering effect and therefore thermal conductivity rises with the increase in ribbon width. [62][63][64][65]…”

Section: Resultsmentioning

confidence: 99%

Thermal transport characterization of carbon and silicon doped stanene nanoribbon: an equilibrium molecular dynamics study

Navid

Subrina

2018

RSC Adv.

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Functionalization of Graphene with Molecules and/or Nanoparticles for Advanced Applications

Scaffaro

Riccobono

Pibiri

2019

Handbook of Graphene

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Length, width and roughness dependent thermal conductivity of graphene nanoribbons

Cited by 41 publications

References 26 publications

Equilibrium Molecular Dynamics (MD) Simulation Study of Thermal Conductivity of Graphene Nanoribbon: A Comparative Study on MD Potentials

Equilibrium Molecular Dynamics (MD) Simulation Study of Thermal Conductivity of Graphene Nanoribbon: A Comparative Study on MD Potentials

Thermal transport characterization of carbon and silicon doped stanene nanoribbon: an equilibrium molecular dynamics study

Functionalization of Graphene with Molecules and/or Nanoparticles for Advanced Applications

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