In-plane thermal transport in black phosphorene/graphene layered heterostructures: a molecular dynamics study

Literature Information

Publication Date 2018-08-06
DOI 10.1039/C8CP02831A
Impact Factor 3.676
Authors

Ting Liang, Ping Zhang, Peng Yuan, Siping Zhai


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Abstract

Heterostructures, which stack two different two-dimensional (2D) materials vertically together, have recently attracted tremendous attention. However, as one of their members, the in-plane thermal conductivity of black phosphorene/graphene (BP/GE) heterostructures, which plays a key role in determining their functional properties, is still unknown. In this work, we use non-equilibrium molecular dynamics (NEMD) simulations to study the in-plane thermal conductivities of BP/GE heterostructures and BP in BP/GE heterostructures. The effect on in-plane thermal conductivity with respect to the size effect (sample length), coupling strength, and hydrogen coverage is systematically examined. It is found that the in-plane thermal conductivity of infinite-size BP/GE bilayer heterostructures exhibits strong anisotropy, which is calculated to be 206.61 ± 6.35 (along the zigzag direction) and 51.02 ± 3.72 W m−1 K−1 (along the armchair direction). In addition, we found that the enhancement of the coupling strength increases the in-plane thermal conductivity of BP/GE heterostructures and BP in BP/GE heterostructures, which may be due to an increase in phonon group velocities in BP and a stronger phonon coupling between BP and GE. In our research, hydrogenation has also been found to enhance the thermal conductivity of BP in heterostructures. The present study is expected to provide guidance for the study of the in-plane thermal transport properties in other 2D heterostructures, and it is of significance for understanding the thermal transport behavior of BP/GE heterostructures and BP in heterostructures and promoting their future applications in thermal management and thermoelectric devices.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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