Open Access Nano Express

Enhancement of Sm3+emission by SnO2nanocrystals in the silica matrix

Jin Mu*, Lingyun Liu and Shi-Zhao Kang

Author Affiliations

Department of Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

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Nanoscale Research Letters 2007, 2:100-103 doi:10.1007/s11671-006-9037-1


The electronic version of this article is the complete one and can be found online at:


Received:17 November 2006
Accepted:19 December 2006
Published:17 January 2007

© 2007 to the authors

Abstract

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 (4G5/2 → 6HJ(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.

Keywords:
Sm3+ions; Emission; Sensibilization; SnO2nanocrystals; Silica matrix

Nano Express

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