Thermal Transport in 2D Materials

Abstract

In recent decades, two-dimensional materials (2D) such as graphene, black and blue phosphorenes, transition metal dichalcogenides (e.g., WS2 and MoS2), and h-BN have received illustrious consideration due to their promising properties. Increasingly, nanomaterial thermal properties have become a topic of research. Since nanodevices have to constantly be further miniaturized, thermal dissipation at the nanoscale has become one of the key issues in the nanotechnology field. Different techniques have been developed to measure the thermal conductivity of nanomaterials. A brief review of 2D material developments, thermal conductivity concepts, simulation methods, and recent research in heat conduction measurements is presented. Finally, recent research progress is summarized in this article.

Thermal Conductivity of MoS2 and Graphene/MoS2 Heterojunction

“…Parameters Value [Reference] Parameters Value [Reference] k B 1.380649 Â 10 À23 J K θ D 250 K [53] v 667.5 m s À1 [54] a 0.316 nm T m 2675 K γ 1.06 [48] β 13.30Â10 À3 GPa À1 [26] β 0 0.96Â10 À3 GPa À2 [26] Y(0) 155 GPa [26] V 0 2.7Â10 À27 m 3 E b0 391 kJ mol À1 [14] v (Poisson's ratio) 0.22 [55] ε Mo-GR 0.0012351 eV [56] ε GR-S 0.00260342 eV [56] σ Mo-GR 0.4025 nm [56] σ GR-S 0.4 nm [56] Figure 1. Schematic diagram of MoS 2 structure and images of MoS 2 thermal conductivity under different conditions.…”

Phonon-boundary scatterings and second-order boundary conditions: Application to the heat transfer in thin layers

“…In the present paper we especially put our attention on the BCs: the phonon collisions with the lateral walls ∂Ω (and the consequent boundary effects) should deserve, in fact, a deeper analysis and discussion since they become as important as the characteristic size of the system at hand is shortened in such a way that it may attain values which are smaller than the phonon mean-free path [17,[36][37][38][39]. For this reason here we're going to propose an enhanced model of BCs which could be added to Eqs.…”

Design of 2D nanomaterials (photo-)electrocatalysts for biomass valorization coupled with H2 production

“…The 2D nanomaterials categories and lignocellulosic biomass cell wall are adopted with permission from Ref. 36 and Ref., 37 respectively.…”

“…1. Graphical illustration of the scope of this review: (a) 2D nanomaterials categories and design strategies and (b) employment of 2D nanomaterials in hybrid water (photo-)electrolysis.The 2D nanomaterials categories and lignocellulosic biomass cell wall are adopted with permission from Ref 36. and Ref.,37 respectively.…”