Influence europium nanostructure size on the emission of KBr:Eu2+
Por:
Mejía-Uriarte E.V., Banuelos, JG, Kolokoltsev O., Navarrete M., Jaque F., Camarillo E., Hernandez, J, Murrieta, H
Publicada:
1 mar 2009
Resumen:
The shape and size of nanostructures formed by the precipitation of europium ions in KBr single crystal has been analyzed using optical absorption (OA), luminescence (LM) and atomic force microscopy (AFM). This work reports a relationship between the emission band peak (EBP) and the nanostructure size. The shift of the t(2g) absorption band towards longer wavelengths and a larger 10 Dq value reveals the growth of the nanostructures (NS). The AFM images show that the precipitates have circular shape and similar to 20 to 400 nm diameter according to the position of EBP at around 428-433 nm. The AFM technique allowed us to relate the shape and size of the nanostructures with our previous research by OA and LM. To our knowledge, the topography of europium ions forming NS of different diameter is observed for first time. (C) 2009 Elsevier Ltd. All rights reserved.
Filiaciones:
Mejía-Uriarte E.V.:
Univ Nacl Autonoma Mexico, Lab Foton Microondas, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico
Banuelos, JG:
Univ Nacl Autonoma Mexico, Lab Mat & Sensores, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico
Kolokoltsev O.:
Univ Nacl Autonoma Mexico, Lab Foton Microondas, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Mexico City 04510, DF, Mexico
Navarrete M.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Jaque F.:
Departamento de Física de Materiales, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain
Camarillo E.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Hernandez, J:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Murrieta, H:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
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