ProChem’s CTO Presents at Faraday Discussion

On September 12, 2022, ProChem’s Chief Technology Officer Dr. V. P. Balema will be presenting a poster on “Mechanochemically – Driven 3D Heterostructuring of Metal Chalcogenides” at Faraday Discussion – Mechanochemistry: Fundamentals, Applications and Future.

ProChem’s CTO presents Mechanochemically Driven 3D Heterostructuring of Metal Chalcogenides
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The presentation discusses generation of 3D-heterostructures with incommensurate arrangements from well-defined building blocks using an unconventional synthetic approach, comprising mechanochemically facilitated reshuffling of layered transition-metal dichalcogenides MX2, [1,2], and non-layered rare-earth metal monochalcogenides REX to form MX2/M’X2 or (REX)nMX2, nano-assemblies, where M (M’) = W, Mo, Ta, Nb, RE = Sm, and X = S or Se [3]. The discovered solid-state transformations are directed by atomic-scale interaction between chemically and structurally similar or dissimilar solids toward ordering. In the case of the layered MoS2 and HfS2 [1], 3D-heterostructuring is energetically favorable over alloying in M’X 2 – MXsystems, whereM, M’ = W, Mo, Ta, Nb, and X = S, or Se [2]. Density-functional theory calculations validated experimental results. The obtained 3D-hetero assemblies demonstrate diverse electron transport behavior, varying from metallic conductivity to indirect band gap semi-conductivity, and superconductivity in some misfit heterostructures [1,3,4].  


  1. I. Z. Hlova et al. Nanoscale Adv. (2021), 3, 4065  
  2. I. Z. Hlova et al. Chem. Commun. (2018), 54, 12574
  3. O. Dolotko et al. Nat. Commun. (2020), 11, 3005
  4. M. B. Sreedhara et al. Chem. Mater. (2022), 34, 1838