PMID- 18821539
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20090128
LR  - 20081013
IS  - 1439-7641 (Electronic)
IS  - 1439-4235 (Linking)
VI  - 9
IP  - 14
DP  - 2008 Oct 6
TI  - Europium-doped mesoporous titania thin films: rare-earth locations and emission 
      fluctuations under illumination.
PG  - 2077-84
LID - 10.1002/cphc.200800328 [doi]
AB  - Herein, Eu(III)-doped 3D mesoscopically ordered arrays of mesoporous and 
      nanocrystalline titania are prepared and studied. The rare-earth-doped titania 
      thin films-synthesized via evaporation-induced self-assembly (EISA)-are 
      characterized by using environmental ellipsoporosimetry, electronic microscopy 
      (i.e. high-resolution scanning electron microscopy, HR-SEM, and transmission 
      electron microscopy, HR-TEM), X-ray diffraction, and luminescence spectroscopy. 
      Structural characterizations show that high europium-ion loadings can be 
      incorporated into the titanium-dioxide walls without destroying the mesoporous 
      arrangement. The luminescence properties of Eu(III) are investigated by using 
      steady-state and time-resolved spectroscopy via excitation of the Eu(III) ions 
      through the titania host. Using Eu(III) luminescence as a probe, the europium-ion 
      sites can be addressed with at least two different environments within the 
      mesoporous framework, namely, a nanocrystalline environment and a glasslike one. 
      Emission fluctuations ((5)D(0)-->(7)F(2)) are observed upon continuous UV 
      excitation in the host matrix. These fluctuations are attributed to charge 
      trapping and appear to be strongly dependent on the amount of europium and the 
      level of crystallinity.
FAU - Leroy, Celine Marie
AU  - Leroy CM
AD  - CNRS, Universite de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 
      Pessac, France. leroy@icmcb-bordeaux.cnrs.fr
FAU - Cardinal, Thierry
AU  - Cardinal T
FAU - Jubera, Veronique
AU  - Jubera V
FAU - Treguer-Delapierre, Mona
AU  - Treguer-Delapierre M
FAU - Majimel, Jerome
AU  - Majimel J
FAU - Manaud, Jean Pierre
AU  - Manaud JP
FAU - Backov, Renal
AU  - Backov R
FAU - Boissiere, Cedric
AU  - Boissiere C
FAU - Grosso, David
AU  - Grosso D
FAU - Sanchez, Clement
AU  - Sanchez C
FAU - Viana, Bruno
AU  - Viana B
FAU - Pelle, Fabienne
AU  - Pelle F
LA  - eng
PT  - Journal Article
PL  - Germany
TA  - Chemphyschem
JT  - Chemphyschem : a European journal of chemical physics and physical chemistry
JID - 100954211
EDAT- 2008/09/30 09:00
MHDA- 2008/09/30 09:01
CRDT- 2008/09/30 09:00
PHST- 2008/09/30 09:00 [pubmed]
PHST- 2008/09/30 09:01 [medline]
PHST- 2008/09/30 09:00 [entrez]
AID - 10.1002/cphc.200800328 [doi]
PST - ppublish
SO  - Chemphyschem. 2008 Oct 6;9(14):2077-84. doi: 10.1002/cphc.200800328.