Longitudinal unzipping of 2D transition metal dichalcogenides

Suchithra Padmajan Sasikala, Yashpal Singh, Li Bing, Taeyoung Yun, Sung Hwan Koo, Yousung Jung () and Sang Ouk Kim ()
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Suchithra Padmajan Sasikala: KAIST
Yashpal Singh: KAIST
Li Bing: KAIST
Taeyoung Yun: KAIST
Sung Hwan Koo: KAIST
Yousung Jung: KAIST
Sang Ouk Kim: KAIST

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Unzipping of the basal plane offers a valuable pathway to uniquely control the material chemistry of 2D structures. Nonetheless, reliable unzipping has been reported only for graphene and phosphorene thus far. The single elemental nature of those materials allows a straightforward understanding of the chemical reaction and property modulation involved with such geometric transformations. Here we report spontaneous linear ordered unzipping of bi-elemental 2D MX2 transition metal chalcogenides as a general route to synthesize 1D nanoribbon structures. The strained metallic phase (1T′) of MX2 undergoes highly specific longitudinal unzipping owing to the self-linearized oxygenation at chalcogenides. Stable dispersions of 1T′ MoS2 nanoribbons with widths of 10–120 nm and lengths up to ~4 µm are produced in water. Edge abundant 1T′ MoS2 nanoribbons reveal the hidden potential of idealized electrocatalysis for hydrogen evolution reactions at a competitive level with the precious Pt catalyst.

Date: 2020
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DOI: 10.1038/s41467-020-18810-0

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