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1. Phonon Dephasing Dynamics in MoS ₂

   https://doi.org/10.1021/acs.nanolett.0c04368  

   Sun, Liuyang; Kumar, Parveen; Liu, Zeyu; Choi, Junho; Fang, Bin; Roesch, Sebastian; Tran, Kha; Casara, Joshua; Priego, Eduardo; Chang, Yu-Ming; et al (February 2021, Nano Letters)

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2. Electron dynamics in MoS ₂ -graphite heterostructures

   https://doi.org/10.1039/C7NR04763K  

   Zhang, Xinwu; He, Dawei; Yi, Lixin; Zhao, Siqi; He, Jiaqi; Wang, Yongsheng; Zhao, Hui (January 2017, Nanoscale)

   The electron dynamics in heterostructures formed by multilayer graphite and monolayer or bulk MoS 2 were studied by femtosecond transient absorption measurements. Samples of monolayer MoS 2 -multilayer graphite and bulk MoS 2 -multilayer graphite were fabricated by exfoliation and dry transfer techniques. Ultrafast laser pulses were used to inject electron–hole pairs into monolayer or bulk MoS 2 . The transfer of these photocarriers to the adjacent multilayer graphite was time resolved by measuring the differential reflection of a probe pulse. We found that photocarriers injected into monolayer MoS 2 transfer to graphite on an ultrafast time scale shorter than 400 fs. Such an efficient charge transfer is key to the development of high performance optoelectronic devices with MoS 2 as the light absorbing layer and graphite as electrodes. The absorption coefficient of monolayer MoS 2 can be controlled by the carriers in graphite. This process can be used for interlayer coupling and control. In a bulk MoS 2 -graphite heterostructure, the photocarrier transfer time is about 220 ps, due to the inefficient interlayer charge transport in bulk MoS 2 . These results provide useful information for developing optoelectronic devices based on MoS 2 -graphite heterostructures. 

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3. Charge Transfer Dynamics in MoSe ₂ /hBN/WSe ₂ Heterostructures

   https://doi.org/10.1021/acs.nanolett.2c04030  

   Yoon, Yoseob; Zhang, Zuocheng; Qi, Ruishi; Joe, Andrew Y.; Sailus, Renee; Watanabe, Kenji; Taniguchi, Takashi; Tongay, Sefaattin; Wang, Feng (December 2022, Nano Letters)
4. Coherent Vibrational Dynamics of Au ₁₄₄ (SC ₈ H ₉ ) ₆₀ Nanoclusters

   https://doi.org/10.1021/acs.jpclett.3c01477  

   Jeffries, William R.; Malola, Sami; Tofanelli, Marcus A.; Ackerson, Christopher J.; Häkkinen, Hannu; Knappenberger, Kenneth L. (July 2023, The Journal of Physical Chemistry Letters)
5. Ultrafast Exciton Dynamics of CH ₃ NH ₃ PbBr ₃ Perovskite Nanoclusters

   https://doi.org/10.1021/acs.jpclett.4c01203  

   Cherrette, Vivien L; Chou, Kai-Chun; Zeitz, David; Guarino-Hotz, Melissa; Khvichia, Mariam; Barnett, Jeremey; Win, Allison; Babbe, Finn; Zhang, Jin Z (May 2024, The Journal of Physical Chemistry Letters)

   Exciton dynamics o perovskite nanoclusters has been investigated or the rst time using emtosecond transient absorption (TA) and time-resolved photoluminescence (TRPL) spectroscopy. The TA results show two photoinduced absorption signals at 420 and 461 nm and a photoinduced bleach (PB) signal at 448 nm. The analysis o the PB recovery kinetic decay and kinetic model uncovered multiple processes contributing to electron−hole recombination. The ast component (∼8 ps) is attributed to vibrational relaxation within the initial excited state, and the medium component (∼60 ps) is attributed to shallow carrier trapping. The slow component is attributed to deep carrier trapping rom the initial conduction band edge (∼666 ps) and the shallow trap state (∼40 ps). The TRPL reveals longer time dynamics, with modeled lietimes o 6.6 and 93 ns attributed to recombination through the deep trap state and direct band edge recombination, respectively. The signicant role o exciton trapping processes in the dynamics indicates that these highly conned nanoclusters have deect-rich suraces. 

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