title: Probing the chemical and electronic properties of the core-shell architecture of transition metal trisulfide nanoribbons.
abstract: Ultraviolet and X-ray photoelectron spectroscopies are used to probe the chemical and electronic structure of an amorphous, 2-20 nm-thick shell that encases the crystalline core in core-shell nanoribbons of TaS(3). The shell is chemically heterogeneous, containing elemental sulfur and a with a notable (S(2))(2-) deficiency over the crystalline TaS(3) core. We find nanoribbon stability to be substrate-dependent; whilst the ribbons are stable on the native oxide of a silicon surface, mass transport of sulfur species between the amorphous shell and a gold substrate leads to a significant change in the electronic properties of the nanomaterials. Our observations may have general implications for the incorporation of nanostructured transition metal chalcogenides into electronic devices.
authors.affiliation: School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK.
authors.forename: M O
authors.initials: MO
authors.lastname: King
authors.forename: M
authors.initials: M
authors.lastname: Popland
authors.forename: S J
authors.initials: SJ
authors.lastname: Denholme
authors.forename: D H
authors.initials: DH
authors.lastname: Gregory
authors.forename: D A
authors.initials: DA
authors.lastname: MacLaren
authors.forename: M
authors.initials: M
authors.lastname: Kadodwala
mesh_terms: D018011:Chalcogens / Q000737:chemistry*; D004553:Electric Conductivity; D004583:Electrons; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008968:Molecular Conformation; D010316:Particle Size; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D018011:Chalcogens; D046911:Macromolecular Substances; D013440:Sulfides