Spatially Controlled Preparation of Layered Metallic-Semiconducting Metal Chalcogenide Heterostructures.
basic_science · Level V
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- Record sourced from PubMed, PMID 34269058.
- Also identified by DOI 10.1021/acsnano.1c03688.
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Abstract
Spatially controlled preparation of heterostructures composed of layered materials is important in achieving interesting properties. Although vapor-phased deposition methods can prepare vertical and lateral heterostructures, liquid-phased methods, which can enable scalable production and further solution processes, have shown limited controllability. Herein, we demonstrate by using wet chemical methods that metallic Sn<sub>0.5</sub>Mo<sub>0.5</sub>S<sub>2</sub> nanosheets can be deposited epitaxially on the edges of semiconducting SnS<sub>2</sub> nanoplates to form SnS<sub>2</sub>/Sn<sub>0.5</sub>Mo<sub>0.5</sub>S<sub>2</sub> lateral heterostructures or coated on both the edges and basal surfaces of SnS<sub>2</sub> to give SnS<sub>2</sub>@Sn<sub>0.5</sub>Mo<sub>0.5</sub>S<sub>2</sub> core@shell heterostructures. They also showed good light-to-heat conversion ability due to the metallic property of Sn<sub>0.5</sub>Mo<sub>0.5</sub>S<sub>2</sub>. In particular, the core@shell heterostructure showed a higher photothermal conversion efficiency than the lateral counterpart, largely due to its randomly oriented and polycrystalline Sn<sub>0.5</sub>Mo<sub>0.5</sub>S<sub>2</sub> layers with larger interfacing area for multiple internal light scattering.