Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces

Zhang，Qi1,2; Li，Wei3,4; Zhao，Ruixuan1; Tang，Peizhe5; Zhao，Jie2; Wu，Guorong2; Chen，Xin3,4; Hu，Mingjun5; Yuan，Kaijun2,6,7; Li，Jiebo1; Yang，Xueming2,6,8

2024-12-01

10.1038/s41467-024-48842-9

Nature Communications   影响因子和分区

2041-1723

The photoinduced non-thermalized hot electrons at an interface play a pivotal role in determining plasmonic driven chemical events. However, understanding non-thermalized electron dynamics, which precedes electron thermalization (~125 fs), remains a grand challenge. Herein, we simultaneously captured the dynamics of both molecules and non-thermalized electrons in the MXene/molecule complexes by femtosecond time-resolved spectroscopy. The real-time observation allows for distinguishing non-thermalized and thermalized electron responses. Differing from the thermalized electron/heat transfer, our results reveal two non-thermalized electron dynamical pathways: (i) the non-thermalized electrons directly transfer to attached molecules at an interface within 50 fs; (ii) the non-thermalized electrons scatter at the interface within 125 fs, inducing adsorbed molecules heating. These two distinctive pathways are dependent on the irradiating wavelength and the energy difference between MXene and adsorbed molecules. This research sheds light on the fundamental mechanism and opens opportunities in photocatalysis and interfacial heat transfer theory.

SCI

英语

其他

2-s2.0-85194128675

Scopus

1.Institute of Medical Photonics,Beijing Advanced Innovation Center for Biomedical Engineering,School of Biological Science and Medical Engineering,Beihang University,Beijing,100191,China
2.State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,457 Zhongshan Road,116023,China
3.Suzhou Laboratory,Suzhou,Jiangsu,215123,China
4.GuSu Laboratory of Materials,Suzhou,Jiangsu,215123,China
5.School of Materials Science and Engineering,Beihang University,Beijing,100191,China
6.Hefei National Laboratory,Hefei,230088,China
7.University of Chinese Academy of Sciences,Beijing,100049,China
8.Department of Chemistry and Center for Advanced Light Source Research,College of Science,Southern University of Science and Technology,Shenzhen,518055,China

Zhang，Qi,Li，Wei,Zhao，Ruixuan,et al. Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces[J]. Nature Communications,2024,15(1).

Zhang，Qi.,Li，Wei.,Zhao，Ruixuan.,Tang，Peizhe.,Zhao，Jie.,...&Yang，Xueming.(2024).Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces.Nature Communications,15(1).

Zhang，Qi,et al."Real-time observation of two distinctive non-thermalized hot electron dynamics at MXene/molecule interfaces".Nature Communications 15.1(2024).