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Creators/Authors contains: "Wang, Baoming"

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  1. We report the synthesis of large-area, high-Ti-content, Mo 1−x Ti x S 2 alloy thin films in the 2H phase at temperature as low as 500 °C using a scalable two-step method of metal film deposition, followed by sulfurization in H 2 S. Film processing at higher temperature accelerates Ti segregation, film coarsening, and the formation of TiS 2 in the 1T phase. Crystal growth at higher temperature results in the formation of multiple binary sulfide phases, in agreement with the equilibrium phase diagram. Making highly metastable, smooth, and uniform single-phase alloy films, therefore, hinges on developing low-temperature processing. Our results are relevant to the development of technologies based on designer transition metal dichalcogenide alloys, including in photonic integrated circuits and gas sensing. 
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