title: Eu(3+) doped gadolinium oxysulfide (Gd(2)O(2)S) nanostructures-synthesis and optical and electronic properties.
abstract: One-dimensional Eu(3+) doped gadolinium oxysulfide (Gd(2)O(2)S:Eu(3+)) nanotubes/nanorods have been synthesized via precursors of Gd(OH)(3) nanostructures using a hydrothermal technique. The blue-shifts in the optical spectra for the Gd(2)O(2)S:Eu(3+) system corresponding to the fundamental absorption and Eu(3+)-X(2-) ligand (X =  O/S) charge transfer bands (CTBs) are significant (∼0.22-0.36 eV) with respect to the bulk counterpart. The nanotubes are good candidates for investigating the size-induced electrical and optical properties of functional oxysulfides. In order to identify the origin and nature of the electronic transitions observed in the visible region, optical and photo-induced impedance measurements have been extended to the nanotubes in this report.
authors.affiliation: Department of Physics, Sree Sevugan Annamalai College, Devakottai-630 033 (TN), India.
authors.forename: J
authors.initials: J
authors.lastname: Thirumalai
authors.forename: R
authors.initials: R
authors.lastname: Chandramohan
authors.forename: R
authors.initials: R
authors.lastname: Divakar
authors.forename: E
authors.initials: E
authors.lastname: Mohandas
authors.forename: M
authors.initials: M
authors.lastname: Sekar
authors.forename: P
authors.initials: P
authors.lastname: Parameswaran