4.6 Article

Systematic Investigations on the Thermal Management Performance of Graphite Thin Films for High-Electron-Mobility Transistors

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Experimental Investigations on Thermal Transport Properties of Nanoscale-Graphite-Film

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Summary: Accurate and direct characterization of the thermal properties of graphene and thin-graphite films (GFs) is important for understanding their heat transport mechanism and potential applications in thermal management. However, the mechanism of the thickness dependence of GFs thermal properties has not been fully understood due to the lack of experimental data. In this study, a 90-nm-thick GF was characterized using the time-domain thermoreflectance method, and its in-plane thermal conductivity and interfacial thermal conductance with gold were obtained. Two theoretical models were also applied for comparison and discussion, concluding that the influence of surface perturbation on phonon transport extends beyond the near surface layers. This work enhances our understanding of the thermal transport size effect in GFs and facilitates their future applications as heat spreaders.

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