Controlling friction energy dissipation by ultrafast interlayer electron-phonon coupling in WS2/graphene heterostructures

被引：0

作者：

Wang, Chong ^{[1
]}

Han, Rui ^{[1
]}

Wang, Yutang ^{[1
,2
]}

Chen, Shihong ^{[1
]}

Xu, Haowen ^{[1
]}

Huang, Shuchun ^{[1
]}

Sun, Zejun ^{[1
]}

Li, Zhihong ^{[3
]}

Luo, Jianbin ^{[1
]}

Liu, Dameng ^{[1
]}

Liu, Huan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol Adv Equipment, Beijing 100084, Peoples R China

[2] Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China

[3] Peking Univ, Sch Integrated Circuits, Beijing 100871, Peoples R China

来源：

NANO ENERGY | 2024年 / 132卷

基金：

中国国家自然科学基金;

关键词：

Interlayer electron-phonon coupling; Non-contact friction energy dissipation; Defects; Ultrafast spectroscopy; Heterostructures; NANOSCALE FRICTION; GRAPHENE; SUPERLUBRICITY; NANOPARTICLES; DEFECTS; LENGTH;

D O I：

10.1016/j.nanoen.2024.110371

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrons and phonons are regarded as the microscopic carriers of friction energy dissipation and their coupling is a typical dissipation mode. However, due to the lack of ultrafast detection technic, the friction mechanism about electron-phonon coupling remains unexplained. Here, using high resolution non-contact atomic force microscopy and ultrafast pump-probe spectroscopy, we find that interlayer electron-phonon coupling dissipation channel in WS2/graphene heterostructures can be enhanced by defects and the electron-phonon scattering time is accelerated from 0.62 ps to 0.27 ps. The enhanced electron-phonon coupling leads to significant energy dissipation. We further quantitatively model the friction with dissipation rate to control the friction energy dissipation by ultrafast interlayer electron-phonon coupling. This work provides a new way to understand the mechanism of electron-phonon coupling in friction.

引用

页数：7

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