J Thirumalai et al 2008 Nanotechnology 19 395703 doi:10.1088/0957-4484/19/39/395703
J Thirumalai1, R Chandramohan1,4, R Divakar2, E Mohandas2, M Sekar3 and P Parameswaran2
Show affiliationsOne-dimensional Eu3+ doped gadolinium oxysulfide (Gd2O2S:Eu3+) 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 Gd2O2S:Eu3+ system corresponding to the fundamental absorption and Eu3+−X2− 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.
71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
Issue 39 (1 October 2008)
Received 2 May 2008, in final form 4 July 2008
Published 11 August 2008
J Thirumalai et al 2008 Nanotechnology 19 395703
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