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Article Dans Une Revue Physical Review B Année : 2022

Atomistic simulation of phonon heat transport across metallic vacuum nanogaps

Résumé

The search for materials with high thermal resistance has promising applications in thermoelectric devices and boiling crisis retardation. In this paper, we study the interfacial heat transfer between water and gold, nanostructuring the gold surface and coating it with graphene. By trapping air (or vacuum in our simulations) between graphene and the nanopatterned surface, we observe a considerable increase in the interfacial resistance compared to the planar gold situation, which is shown to scale with the effective graphene–gold contact surface for both monolayer and multilayer graphene. With the massive thermal resistances we predict (up to 200 nm in terms of Kapitza length), the system proposed here represents a robust alternative to superhydrophobic Cassie materials. Moreover, since the low thermal conductance is achieved primarily due to geometry (vacuum trapping), it is straightforward to extend our results to any material with a structure equivalent to that of the nanopatterned gold wall considered here.

Dates et versions

hal-03854212 , version 1 (15-11-2022)

Identifiants

Citer

Yangyu Guo, Christophe Adessi, Manuel Cobian, Samy Merabia. Atomistic simulation of phonon heat transport across metallic vacuum nanogaps. Physical Review B, 2022, 106 (8), pp.085403. ⟨10.1103/PhysRevB.106.085403⟩. ⟨hal-03854212⟩
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