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Controllable Synthesis of 2D and 1D MoS2 Nanostructures on Au Surface

TitleControllable Synthesis of 2D and 1D MoS2 Nanostructures on Au Surface
Publication TypeJournal Article
Year of Publication2017
AuthorsXu, Hai, Ding Zijing, Nai Chang Tai, Bao Yang, Cheng Fang, Tan Sherman J. R., and Loh Kian Ping
JournalAdv. Funct. Mater.
Date Published05/2017
Keywordsau(111), gold, graphene nanoribbons, magnetic-properties, single-layer mos2, stability

A bottom-up growth approach based on the assembly of binary atomic constituents delivers precise control over the edge termination and dimensions of nanostructures. Here, the dimensional crossover of MoS2 from 1D nano-ribbons to 2D islands synthesized by the assembly of Mo and S atoms on Au(100) surface is studied. Low-temperature scanning tunneling microscopy and in situ Q-plus non-contact atomic force microscopy are employed to elucidate the edge structure of MoS2 nanoribbons at the atomic scale, where three types of zigzag Mo-edges with different sulfur terminations are observed. It is found that the thermodynamic instability of the armchair edges causes the 1D system to develop faceted zigzag edges which manifests in the morphological evolution from 1D ribbons to 2D triangles as the system size increases.


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