Open Access

Enhancement of Sm3+emission by SnO2nanocrystals in the silica matrix

Nanoscale Research Letters20072:100

Received: 17 November 2006

Accepted: 19 December 2006

Published: 17 January 2007


Silica xerogels containing Sm3+ions and SnO2nanocrystals were prepared in a sol–gel process. The image of transmission electron microscopy (TEM) shows that the SnO2nanocrystals are dispersed in the silica matrix. The X-ray diffraction (XRD) of the sample confirms the tetragonal phase of SnO2. The xerogels containing SnO2nanocrystals and Sm3+ions display the characteristic emission of Sm3+ions (4G5/26H J (J = 5/2, 7/2, 9/2)) at the excitation of 335 nm which energy corresponds to the energy gap of the SnO2nanocrystals, while no emission of Sm3+ions can be observed for the samples containing Sm3+ions. The enhancement of the Sm3+emission is probably due to the energy transfer from SnO2nanocrystals to Sm3+ions.


Sm3+ionsEmissionSensibilizationSnO2nanocrystalsSilica matrix


Authors’ Affiliations

Department of Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology


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© To the authors 2007