{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Wang Z"],"funding":["Schweizerischer Nationalfonds zur F??rderung der Wissenschaftlichen Forschung","Swiss National Science Foundation","European Research Council","H2020 Future and Emerging Technologies"],"pagination":["18403-18410"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8614232"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["15(11)"],"pubmed_abstract":["Metallic two-dimensional (2D) transition metal dichalcogenides (TMDCs) are attracting great attention because of their interesting low-temperature properties such as superconductivity, magnetism, and charge density waves (CDW). However, further studies and practical applications are being slowed down by difficulties in synthesizing high-quality materials with a large grain size and well-determined thickness. In this work, we demonstrate epitaxial chemical vapor deposition (CVD) growth of 2D NbS<sub>2</sub> crystals on a sapphire substrate, with a thickness-dependent structural phase transition. NbS<sub>2</sub> crystals are epitaxially aligned by the underlying c-plane sapphire resulting in high-quality growth. The thickness of NbS<sub>2</sub> is well controlled by growth parameters to be between 1.5 and 10 nm with a large grain size of up to 500 μm. As the thickness increases, we observe in our NbS<sub>2</sub> a transition from a metallic 3R-polytype to a superconducting 2H-polytype, confirmed by Raman spectroscopy, aberration-corrected scanning transmission electron microscopy (STEM) and electrical transport measurements. A Berezinskii-Kosterlitz-Thouless (BKT) superconducting transition occurs in the CVD-grown 2H-phase NbS<sub>2</sub> below the transition temperature (<i>T</i><sub>c</sub>) of 3 K. Our work demonstrates thickness and phase-controllable synthesis of high-quality superconducting 2D NbS<sub>2</sub>, which is imperative for its practical applications in next-generation TMDC-based electrical devices."],"journal":["ACS nano"],"pubmed_title":["Superconducting 2D NbS<sub>2</sub> Grown Epitaxially by Chemical Vapor Deposition."],"pmcid":["PMC8614232"],"funding_grant_id":["899775","682332","881603","175822","157739","829035","785219"],"pubmed_authors":["Ji HG","Kis A","Tripathi M","Cheon CY","Marega GM","Macha M","Wang Z","Zhao Y","Radenovic A"],"additional_accession":[]},"is_claimable":false,"name":"Superconducting 2D NbS<sub>2</sub> Grown Epitaxially by Chemical Vapor Deposition.","description":"Metallic two-dimensional (2D) transition metal dichalcogenides (TMDCs) are attracting great attention because of their interesting low-temperature properties such as superconductivity, magnetism, and charge density waves (CDW). However, further studies and practical applications are being slowed down by difficulties in synthesizing high-quality materials with a large grain size and well-determined thickness. In this work, we demonstrate epitaxial chemical vapor deposition (CVD) growth of 2D NbS<sub>2</sub> crystals on a sapphire substrate, with a thickness-dependent structural phase transition. NbS<sub>2</sub> crystals are epitaxially aligned by the underlying c-plane sapphire resulting in high-quality growth. The thickness of NbS<sub>2</sub> is well controlled by growth parameters to be between 1.5 and 10 nm with a large grain size of up to 500 μm. As the thickness increases, we observe in our NbS<sub>2</sub> a transition from a metallic 3R-polytype to a superconducting 2H-polytype, confirmed by Raman spectroscopy, aberration-corrected scanning transmission electron microscopy (STEM) and electrical transport measurements. A Berezinskii-Kosterlitz-Thouless (BKT) superconducting transition occurs in the CVD-grown 2H-phase NbS<sub>2</sub> below the transition temperature (<i>T</i><sub>c</sub>) of 3 K. Our work demonstrates thickness and phase-controllable synthesis of high-quality superconducting 2D NbS<sub>2</sub>, which is imperative for its practical applications in next-generation TMDC-based electrical devices.","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Nov","modification":"2025-04-05T12:32:15.571Z","creation":"2025-04-05T12:32:15.571Z"},"accession":"S-EPMC8614232","cross_references":{"pubmed":["34756018"],"doi":["10.1021/acsnano.1c07956"]}}