RT Journal Article
T1 Synthesis and cathodoluminescence of undoped and Cr^(3+)-doped Sodium Titanate nanotubes and nanoribbons
A1 Díaz-Guerra Viejo, Carlos
A1 Umek, Paloma
A1 Gloter, Alexandre
A1 Piqueras De Noriega, Francisco Javier
AB We report on the synthesis of Cr^(3+)-doped sodium titanate nanotubes and nanoribbons by a hydrothermal method. The presence of dopant ions in these nanostructures was confirmed by high angle annular dark field scanning transmission electron microscopy in combination with electron energy loss spectroscopy measurements. Luminescence properties of undoped and Cr^(3+)-doped sodium titanate nanotubes and nanoribbons were investigated by cathodoluminescence in the scanning electron microscope. A broad visible band in the range 1.7-2.7 eV is observed in these nanostructures. Such emission is similar to that observed in bulk anatase TiO_2 and titanate powders, and is related to TiO_6 octahedra, which is a common feature to all the samples investigated. Near-infrared emission, sometimes attributed to Ti^(3+) interstitials, is observed in bulk powders but is absent in the titanate nanotubes and nanoribbons. Incorporation of Cr^(3+) between the titanate layers of the nanostructures is revealed by the characteristic intraionic emission line at 1.791 eV. Sodium titanate nanoribbons appear to be an effective host for optically active Cr^(3+) ions, as compared with nanotubes or bulk powder.
PB Elsevier Science BV
SN 1932-7447
YR 2010
FD 2010-05-13
LK https://hdl.handle.net/20.500.14352/44217
UL https://hdl.handle.net/20.500.14352/44217
LA eng
NO © 2010 American Chemical Society.This work has been supported by MEC trough projects MAT2006-01259 and MAT2009-07882 and by the Slovenian Research Agency (J2-9217). P.U. and A.G. also acknowledge financial support from the European Union as a part of a Framework 6 program under a contract for an Integrated Infrastructure Initiative (reference 026019 ESTEEM).
NO MEC
NO Slovenian Research Agency
NO European Union
DS Docta Complutense
RD 8 abr 2025