Enhancement of Sm<sup>3+</sup>emission by SnO<sub>2</sub>nanocrystals in the silica matrix
<p>Abstract</p><p>Silica xerogels containing Sm<sup>3+</sup>ions and SnO<sub>2</sub>nanocrystals were prepared in a sol–gel process. The image of transmission electron microscopy (TEM) shows that the SnO<sub>2</sub>nanocrystals are disp...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2007-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-006-9037-1 |
| Summary: | <p>Abstract</p><p>Silica xerogels containing Sm<sup>3+</sup>ions and SnO<sub>2</sub>nanocrystals were prepared in a sol–gel process. The image of transmission electron microscopy (TEM) shows that the SnO<sub>2</sub>nanocrystals are dispersed in the silica matrix. The X-ray diffraction (XRD) of the sample confirms the tetragonal phase of SnO<sub>2</sub>. The xerogels containing SnO<sub>2</sub>nanocrystals and Sm<sup>3+</sup>ions display the characteristic emission of Sm<sup>3+</sup>ions (<sup>4</sup>G<sub>5/2 </sub>→ <sup>6</sup>H<sub><it>J</it></sub>(<it>J</it> = 5/2, 7/2, 9/2)) at the excitation of 335 nm which energy corresponds to the energy gap of the SnO<sub>2</sub>nanocrystals, while no emission of Sm<sup>3+</sup>ions can be observed for the samples containing Sm<sup>3+</sup>ions. The enhancement of the Sm<sup>3+</sup>emission is probably due to the energy transfer from SnO<sub>2</sub>nanocrystals to Sm<sup>3+</sup>ions.</p> |
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| ISSN: | 1931-7573 1556-276X |