Evidence of Surface-Mediated Carrier-Phonon Scattering in MXene

Zhao，Jie1,2; Zhang，Qi2; Sui，Laizhi2; Niu，Guangming2; Zhang，Yutong2; Wu，Guorong2; Yu，Shengrui1; Yuan，Kaijun2,3,4; Yang，Xueming2,4,5

2023-12-12

10.1021/acsnano.3c07431

ACS Nano   影响因子和分区

1936-0851

1936-086X

In a two-dimensional (2D) metallic nanostructure, when a sample’s thickness is shorter than a carrier mean free path, the ultrathin thickness may influence carrier and energy transport, owing to surface scattering. However, to date, for metallic 2D transition-metal carbides (MXenes), experiments and calculations related to surface scattering have not been performed. The contribution of ultrathin structures to carrier surface scattering in MXene is yet to be explored. Herein, to reveal this effect, we design various models, including metal/MXene, dielectric/MXene, and bulk structure, and analyze their carrier dynamics via ultrafast spectroscopy. The results related to carrier dynamics indicate that the influence of the dielectric/MXene interface and the temperature is negligible. In contrast, the carrier dynamic lifetimes are prolonged owing to weakened surface scattering in metal/MXene, which is supported by ab initio calculations. These results suggest that the carrier-phonon scattering is dominated by surface scattering. These findings can help guide effective energy transport and enhance energy conversion and catalysis.

carrier-phonon interaction MXene out-of-plane size surface scattering ultrafast spectroscopy

EI ; SCI

英语

NI论文

其他

20235015218053

Carbides ; Phonons ; Raman scattering ; Transition metals

Metallurgy and Metallography:531 ; Light/Optics:741.1 ; Inorganic Compounds:804.2 ; Ceramics:812.1 ; Classical Physics; Quantum Theory; Relativity:931

2-s2.0-85179605437

Scopus

1.Hangzhou Institute of Advanced Studies,Zhejiang Normal University,Hangzhou,311231,China
2.State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.University of Chinese Academy of Sciences,Beijing,100049,China
4.Hefei National Laboratory,Hefei,230088,China
5.Department of Chemistry and Center for Advanced Light Source Research,College of Science,Southern University of Science and Technology,Shenzhen,518055,China

Zhao，Jie,Zhang，Qi,Sui，Laizhi,et al. Evidence of Surface-Mediated Carrier-Phonon Scattering in MXene[J]. ACS Nano,2023,17(23):23714-23722.

Zhao，Jie.,Zhang，Qi.,Sui，Laizhi.,Niu，Guangming.,Zhang，Yutong.,...&Yang，Xueming.(2023).Evidence of Surface-Mediated Carrier-Phonon Scattering in MXene.ACS Nano,17(23),23714-23722.

Zhao，Jie,et al."Evidence of Surface-Mediated Carrier-Phonon Scattering in MXene".ACS Nano 17.23(2023):23714-23722.