More Like this

1. Synthesis of layered vs planar Mo ₂ C: role of Mo diffusion

   https://doi.org/10.1088/2053-1583/ac43fa  

   Shehzad, M Arslan; Das, Paul Masih; Tyner, Alexander C; Cheng, Matthew; Lee, Yea-Shine; Goswami, P; Dos Reis, Roberto; Chen, Xinqi; Dravid, Vinayak P (January 2022, 2D Materials)

   Abstract Chemical vapor deposition growth of metal carbides is of great interest as this method provides large area growth of MXenes. This growth is mainly done using a melted diffusion based process; however, different morphologies in growth process is not well understood. In this work, we report deterministic synthesis of layered (non-uniform c -axis growth) and planar (uniform c -axis growth) of molybdenum carbide (Mo 2 C) using a diffusion-mediated growth. Mo-diffusion limited growth mechanism is proposed where the competition between Mo and C adatoms determines the morphology of grown crystals. Difference in thickness of catalyst at the edge and center lead to enhanced Mo diffusion which plays a vital role in determining the structure of Mo 2 C. The layered structures exhibit an expansion in the lattice confirmed by the presence of strain. Density functional theory shows consistent presence of strain which is dependent upon Mo diffusion during growth. This work demonstrates the importance of precise control of diffusion through the catalyst in determining the structure of Mo 2 C and contributes to broader understanding of metal diffusion in growth of MXenes. 

   more » « less
2. Synthesis of Mo ₄ VAlC ₄ MAX Phase and Two-Dimensional Mo ₄ VC ₄ MXene with Five Atomic Layers of Transition Metals

   https://doi.org/10.1021/acsnano.9b07708  

   Deysher, Grayson; Shuck, Christopher Eugene; Hantanasirisakul, Kanit; Frey, Nathan C.; Foucher, Alexandre C.; Maleski, Kathleen; Sarycheva, Asia; Shenoy, Vivek B.; Stach, Eric A.; Anasori, Babak; et al (January 2020, ACS Nano)
3. Family of Mo ₄ Ga ₂₁ -Based Superconductors

   https://doi.org/10.1021/acs.chemmater.0c02311  

   Verchenko, Valeriy Yu.; Zubtsovskii, Alexander O.; Plenkin, Danil S.; Bogach, Alexey V.; Wei, Zheng; Tsirlin, Alexander A.; Dikarev, Evgeny V.; Shevelkov, Andrei V. (August 2020, Chemistry of Materials)

   null (Ed.)
4. Two-Dimensional MXenes Mo ₂ Ti ₂ C ₃ T _z and Mo ₂ TiC ₂ T _z : Microscopic Conductivity and Dynamics of Photoexcited Carriers

   https://doi.org/10.1021/acsaem.9b01966  

   Li, Guangjiang; Natu, Varun; Shi, Teng; Barsoum, Michel W.; Titova, Lyubov V. (January 2020, ACS Applied Energy Materials)
5. K ₃ [Mo ₂ (SNO5) ₄ Cl] ₃ [Mo ₂ (SNO5) ₄ ]: the first example of a heterometallic extended metal atom node (HEMAN)

   https://doi.org/10.1039/c6dt03659g  

   Dolinar, Brian S.; Kozimor, Stosh A.; Berry, John F. (January 2016, Dalton Transactions)

   We present the synthesis, structure, and electrochemistry of K 3 [Mo 2 (SNO5) 4 Cl] 3 [Mo 2 (SNO5) 4 ] ( 1 , HSNO5 = monothiosuccinimide), the first example of a heterometallic extended metal atom node (HEMAN). The HEMAN consists of two perpendicular, intersecting lines of metal atoms formed by three [Mo 2 (SNO5) 4 Cl] − units and one [Mo 2 (SNO5) 4 ] unit tethered together by K + ions. 

   more » « less