Isotopic effects on the thermal conductivity of graphene nanoribbons: Localization mechanism

By Jin-Wu Jiang, Jinghua Lan, Jian-Sheng Wang, Baowen Li. 2010

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Thermal conductivity of graphene nanoribbons (GNR) with length 106 A and width 4.92 A after isotopic doping is investigated by molecular dynamics with quantum correction. Two interesting phenomena are found, (1) isotopic doping reduces thermal conductivity effectively in low doping region, and the reduction slows down in high doping region, (2) thermal conductivity increases with increasing temperature in both pure and doped GNR, but the increasing behavior is much more slow in the doped GNR than that in pure ones. Further studies reveal that the physics of these two phenomena is related to the localized phonon modes, whose number increases quickly (slowly) with increasing isotopic doping in low (high) isotopic doping region.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/572e971ede37e7aa08837b9a96c86577b1079316

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In Materials Chemistry

Citations in the corpus

Graphene-based nanomaterials for drug delivery and tissue engineering. (2014, background): “The thermal properties of graphene are also greatly affected by phenomenon such as defect edge scattering [28] and isotopic doping [29] due to scattering or localization of phonons at the defect sites.”
Thermal conductivity of isotopically modified graphene. (2011, background): “4 just started [8, 17] and experimental data is needed for model validation.”