Synthesis and luminescence properties of Eu(III)-doped nanoporous silica spheres

Motohiro Tagaya, Toshiyuki Ikoma, Tomohiko Yoshioka, Satoshi Motozuka, Zhefeng Xu, Fujio Minami, Junzo Tanaka

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Europium (III) (Eu 3+)-doped nanoporous silica spheres were synthesized, and the states of Eu 3+ ions in the silica framework structure were investigated. The ordered nanopores were preserved with the doping at the Eu 3+ molar concentration to Si up to 10mol%, and the O-Si-O and Si-OH groups in the structures were clearly rearranged with the doping, indicating the interaction of Eu 3+ with the O atoms. The significant morphological changes in the spheres were observed with the doping. The photoluminescence spectral shapes due to the transitions of 5D 0- 7F 1 and 5D 0- 7F 2 were indicative of the presence of the Eu 3+ in an environment of a low symmetry. It was found that the Eu 3+ was located inside the silica framework to electrostatically interact with the environmental O atoms, which would prevent the aggregation among Eu 3+ ions to show the efficient luminescence. Therefore, the interactions between the Eu 3+ ions and silica framework structures in the spheres were successfully clarified.

Original languageEnglish
Pages (from-to)456-464
Number of pages9
JournalJournal of Colloid and Interface Science
Volume363
Issue number2
DOIs
Publication statusPublished - Nov 15 2011
Externally publishedYes

Fingerprint

Silicon Dioxide
Luminescence
Silica
Doping (additives)
Ions
Europium
Atoms
Nanopores
Photoluminescence
Agglomeration

Keywords

  • Bio-imaging
  • Europium
  • Nanoparticles
  • Nanoporous silica spheres
  • Photoluminescence

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

Synthesis and luminescence properties of Eu(III)-doped nanoporous silica spheres. / Tagaya, Motohiro; Ikoma, Toshiyuki; Yoshioka, Tomohiko; Motozuka, Satoshi; Xu, Zhefeng; Minami, Fujio; Tanaka, Junzo.

In: Journal of Colloid and Interface Science, Vol. 363, No. 2, 15.11.2011, p. 456-464.

Research output: Contribution to journalArticle

Tagaya, Motohiro ; Ikoma, Toshiyuki ; Yoshioka, Tomohiko ; Motozuka, Satoshi ; Xu, Zhefeng ; Minami, Fujio ; Tanaka, Junzo. / Synthesis and luminescence properties of Eu(III)-doped nanoporous silica spheres. In: Journal of Colloid and Interface Science. 2011 ; Vol. 363, No. 2. pp. 456-464.
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AU - Xu, Zhefeng

AU - Minami, Fujio

AU - Tanaka, Junzo

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