Understanding and engineering interfacial thermal conductance of two-dimensional materials

Zheng, Weidong; Shao, Cheng; Wang, Qi; Li, Guojun; Li, Hongkun

doi:10.1016/j.surfin.2023.103538

Surfaces and Interfaces

2023

DOI: 10.1016/j.surfin.2023.103538

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Understanding and engineering interfacial thermal conductance of two-dimensional materials

Weidong Zheng,

Cheng Shao,

Qi Wang

et al.

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2024

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Cited by 1 publication

References 238 publications

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Substrate-independent thermal conductance of Al/graphene/dielectric interfaces from 80 to 300 K

Zheng,

Shao,

Zhang

et al. 2024

Applied Physics Letters

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Despite the importance of physical understanding of interfacial thermal conductance (G) for metal/graphene (Gr)/dielectric interfaces, there exists a large discrepancy regarding the role of dielectric substrates in thermal transport across graphene interfaces in previous studies. In this work, we experimentally investigate the impact of dielectric substrates on thermal transport across metal/Gr/dielectric interfaces through accurately measuring G for various Al/Gr/dielectric interfaces over a temperature range of 80–300 K, using both standard time-domain thermoreflectance (TDTR) and differential TDTR. We find that G of Al/Gr/dielectric falls within the range of 29–36 MW m−2 K−1 at room temperature and displays notably weak substrate dependence even with the dielectric Debye temperature ranging from 500 to 1050 K. This substrate independence is attributed to the dominant role of phonon transmission at metal/Gr interfaces in thermal transport across metal/Gr/dielectric interfaces, and the insignificant impacts of phonon density of states overlap on G for Gr/dielectric interfaces. Moreover, through the comparison of our measured G for both Gr/crystalline-Al2O3 and Gr/amorphous-Al2O3, we demonstrate that contrary to previous predictions, the crystalline and amorphous forms of dielectrics do not play a substantial role in thermal transport across graphene interfaces. Our work fills the gap in experimental data on G for metal/Gr/dielectric interfaces and provides valuable insights into physical understanding of thermal transport mechanisms across such interfaces.

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Substrate-independent thermal conductance of Al/graphene/dielectric interfaces from 80 to 300 K

Zheng,

Shao,

Zhang

et al. 2024

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

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Understanding and engineering interfacial thermal conductance of two-dimensional materials

Cited by 1 publication

References 238 publications

Substrate-independent thermal conductance of Al/graphene/dielectric interfaces from 80 to 300 K

Substrate-independent thermal conductance of Al/graphene/dielectric interfaces from 80 to 300 K

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