Impacto
Downloads
Downloads per month over past year
Díaz-Guerra Viejo, Carlos and Umek, Paloma and Gloter, Alexandre and Piqueras de Noriega, Javier (2010) Synthesis and cathodoluminescence of undoped and Cr^(3+)-doped Sodium Titanate nanotubes and nanoribbons. Journal of Physical Chemistry C, 114 (18). pp. 8192-8198. ISSN 1932-7447
![]() |
PDF
Restringido a Repository staff only 2MB |
Official URL: http://dx.doi.org/10.1021/jp1005132
Abstract
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.
Item Type: | Article |
---|---|
Additional Information: | © 2010 American Chemical Society. |
Uncontrolled Keywords: | Tio_2, Oxide, Luminescence, Morphology, Photoluminescence, Nanostructures, Nanoparticles, Spectroscopy, Growth, States |
Subjects: | Sciences > Physics > Materials |
ID Code: | 25673 |
Deposited On: | 05 Jun 2014 18:06 |
Last Modified: | 12 May 2016 15:39 |
Origin of downloads
Repository Staff Only: item control page