title: Apparent two-dimensional behavior of TiO2 nanotubes revealed by light absorption and luminescence.
abstract: Optical absorption and photoluminescence (PL) properties of colloidal TiO(2) nanotubes, produced by the alkali hydrothermal method, were studied at room temperature in the range 300-700 nm. Nanotubes having an internal diameter in the range 2.5-5 nm have very similar optical properties, in contrast to the expected behavior for quasi-1-D systems. This is explained by the complete thermal smearing of all 1-D effects, due to the large effective mass of charge carriers in TiO(2), resulting in an apparent 2-D behavior of TiO(2) nanotubes.
authors.affiliation: Catalysis and Reaction Engineering Group, Department of Chemical Engineering, University of Bath, Bath, BA2 7AY, UK. D.V.Bavykin@bath.ac.uk
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Bavykin
authors.forename: Sergey N
authors.initials: SN
authors.lastname: Gordeev
authors.forename: Andriy V
authors.initials: AV
authors.lastname: Moskalenko
authors.forename: Alexei A
authors.initials: AA
authors.lastname: Lapkin
authors.forename: Frank C
authors.initials: FC
authors.lastname: Walsh