The dual role of interlayer crosslinks leads to an abnormal behavior of interlayer thermal resistance in multilayer graphene

Page view(s)
2
Checked on Jan 25, 2024
The dual role of interlayer crosslinks leads to an abnormal behavior of interlayer thermal resistance in multilayer graphene
Title:
The dual role of interlayer crosslinks leads to an abnormal behavior of interlayer thermal resistance in multilayer graphene
Journal Title:
International Journal of Thermal Sciences
Publication Date:
20 August 2022
Citation:
Chen, Y., Wan, J., Chen, Y., Qin, H., Liu, Y., Pei, Q.-X., & Zhang, Y.-W. (2023). The dual role of interlayer crosslinks leads to an abnormal behavior of interlayer thermal resistance in multilayer graphene. International Journal of Thermal Sciences, 183, 107871. https://doi.org/10.1016/j.ijthermalsci.2022.107871
Abstract:
Understanding and controlling the interlayer thermal resistance (ITR) are crucial to the cross-plane thermal transport in multilayer graphene (MLG). Using non-equilibrium molecular dynamics simulations, we show that the ITR of MLG can be effectively tuned by in-plane defects, sp2 and sp3 C–C bond crosslinks. Specifically, with the increase of the in-plane defect density, the ITR initially increases sharply and then almost saturates; while with the increase of the crosslink density, the ITR initially also increases sharply, then peaks and subsequently decreases rapidly to a level that can be even lower than that of pristine MLG. The underlying mechanism for this unexpected variation of ITR with crosslink density is explored through the analyses of the phonon density of states (DOS) and spectral transmission function. It was found that the crosslinks play a dual role: the crosslinkgenerated in-plane defect enhances phonon scattering and leads to an increase in the ITR, while the interlayer bonding gives rise to a fast phonon transmission pathway and decreases the ITR. An effective medium approximation (EMA) model was proposed to describe the dual role of the crosslinks. This work provides new insight into the thermal transport behavior of crosslinks, which is useful for modulating the cross-plane thermal transport of MLG for the thermal management of MLG-based nanodevices.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP24-2020-0002

This research / project is supported by the A*STAR - SERC Central Research Fund Award
Grant Reference no. : N.A

Acknowledges the financial support from National Natural Science Foundation of China (12102323), China Postdoctoral Science Foundation (2021M692574) and the Fundamental Research Funds for the Central Universities (sxzy012022024), National Natural Science Foundation of China (12102396) and China Postdoctoral Science Foundation (2021M692921), National Natural Science Foundation of China (11890674).
Description:
ISSN:
1290-0729
Files uploaded:

File Size Format Action
the-dual-role-of-interlayer-crosslinks.pdf 1.25 MB PDF Request a copy