Cooling Dynamics in Ti2CTx MXene Thin Films
Author Information
Author(s): Wang Tong, Yao Chengning, Gao Ruoyu, Holicky Martin, Hu Beier, Liu Sihui, Wu Shuwei, Kim Hyunho, Ning Haoqing, Torrisi Felice, Bakulin Artem A.
Primary Institution: Imperial College London
Hypothesis
What are the energy dissipation dynamics in Ti2CTx MXene thin films compared to Ti3C2Tx?
Conclusion
The study reveals that the carrier cooling time in Ti2CTx is approximately 2.6 ps, and heat dissipation occurs over hundreds of nanoseconds.
Supporting Evidence
- The carrier cooling time in Ti2CTx is 2.6 ps, which is longer than that in Ti3C2Tx.
- Heat dissipation in both MXene films occurs over hundreds of nanoseconds.
- The absence of a hot-phonon bottleneck during the cooling process in Ti2CTx was observed.
- Thermal diffusivity for Ti2CTx is ∼0.06 mm2 s–1 and for Ti3C2Tx is ∼0.02 mm2 s–1.
Takeaway
This study looks at how quickly heat moves in a special material called Ti2CTx MXene, showing it cools down slower than another similar material.
Methodology
Ultrafast laser spectroscopy was used to study the cooling dynamics of electrons and lattice in Ti2CTx thin films.
Limitations
The study may not fully capture the lattice cooling dynamics due to the limitations of previous experiments.
Digital Object Identifier (DOI)
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