title: Doping concentration dependence of microstructure and magnetic behaviours in Co-doped TiO2 nanorods.
abstract: Co-doped titanium dioxide (TiO2) nanorods with different doping concentrations were fabricated by a molten salt method. It is found that the morphology of TiO2 changes from nanorods to nanoparticles with increasing doping concentration. The mechanism for the structure and phase evolution is investigated in detail. Undoped TiO2 nanorods show strong ferromagnetism at room temperature, whereas incorporating of Co deteriorates the ferromagnetic ordering. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) results demonstrate that the ferromagnetism is associated with Ti vacancy.
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Li-Ting
authors.initials: LT
authors.lastname: Tseng
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Xi
authors.initials: X
authors.lastname: Luo
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Thiam Teck
authors.initials: TT
authors.lastname: Tan
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Sean
authors.initials: S
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Jiabao
authors.initials: J
authors.lastname: Yi
keywords: Ferromagnetism; Nanorods; Ti vacancy; TiO2