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- W2762223421 abstract "Evolutionary algorithm is combined with full-potential ab initio calculations to investigate conformational space of (MoS2)n and (MoSe2)n (n = 1–10) nanoclusters and to identify the lowest energy structural isomers of these systems. It is argued that within both BLYP and PBE functionals, these nanoclusters favor sandwiched planar configurations, similar to their ideal planar sheets. The second order difference in total energy (Δ2E) of the lowest energy isomers is computed to estimate the abundance of the clusters at different sizes and to determine the magic sizes of (MoS2)n and (MoSe2)n nanoclusters. In order to investigate the electronic properties of nanoclusters, their energy gap is calculated by several methods, including hybrid functionals (B3LYP and PBE0), GW approach, and Δscf method. At the end, the vibrational modes of the lowest lying isomers are calculated by using the force constants method and the IR active modes of the systems are identified. The vibrational spectra are used to calculate the Helmholtz free energy of the systems and then to investigate abundance of the nanoclusters at finite temperatures." @default.
- W2762223421 created "2017-10-20" @default.
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- W2762223421 date "2018-04-01" @default.
- W2762223421 modified "2023-09-28" @default.
- W2762223421 title "First-principles study of MoS2 and MoSe2 nanoclusters in the framework of evolutionary algorithm and density functional theory" @default.
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- W2762223421 doi "https://doi.org/10.1016/j.cplett.2018.03.008" @default.
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