title: Controlled synthesis of heterogeneous metal-titania nanostructures and their applications.
abstract: We describe a new synthetic approach to heterogeneous metal-TiO(2) nanomaterials based on  conversion of Ti(3+) to hydrous TiO(2) occurring uniquely on the nanostructured metallic surfaces such as Pt, Au, and Ni nanowires and nanoparticles. The TiO(2) growth mechanism was studied by designing an electrochemical cell. A variety of heterogeneous metal-TiO(2) nanostructures, such as segmented metal-TiO(2) nanowires, core-shell metal-TiO(2) nano/microparticles, and composite metal-TiO(2) nanotubes, can be fabricated by varying the morphology of the seeding metal nanostructure or  controlling  selective TiO(2) growth on different surfaces of the metallic nanomaterial. Altering the reaction time and Ti(3+) concentration allows the TiO(2) segment lengths or TiO(2) shell thicknesses to be finely tuned. Coaxial Au-TiO(2) nanorod arrays were demonstrated to be fast lithium-ion storage materials, while the core-shell Ni-TiO(2) nanoparticles exhibited excellent photodegradation properties as magnetic recyclable photocatalysts.
authors.affiliation: Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Ran
authors.initials: R
authors.lastname: Liu
authors.forename: Ayusman
authors.initials: A
authors.lastname: Sen
mesh_terms: D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D006046:Gold; D009532:Nickel; D014025:Titanium