%0 Journal Article %T Local heterogeneity for a Eu3+-doped glass evidenced by time-resolved fluorescence spectroscopy coupled to scanning near-field optical microscopy %+ Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME) %+ CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)) %A Dossot, M. %A Grausem, J. %A Cremel, S. %A Humbert, B. %A Viala, F. %A Mauchien, P. %@ 1520-6106 %J Journal of Physical Chemistry B %I American Chemical Society %8 2006 %D 2006 %R 10.1021/jp0607317 %K Fluorescence %K / near-field %K / scanning microscopy %K / europium %K / nuclear glass. %Z Physics [physics]/Nuclear Experiment [nucl-ex] %Z Physics [physics]/Nuclear Theory [nucl-th]Journal articles %X Time-resolved fluorescence spectroscopy (TRFS) was applied to an aluminate glass sample doped with Eu3+ cation as a fluorescent probe of chemical environment and local symmetry. Conventional far field experiments revealed the presence of two different phases an amorphous phase featured by a highly disordered environment surrounding the Eu3+ cation and a more ordered polycrystalline phase that shows a significant increase of the Eu3+ fluorescence decay time compared to the amorphous phase. Near-field fluorescence spectra and decay kinetics were performed in the frontier region between the two phases using a home-built scanning near-field optical microscope (SNOM). SNOM-TRFS experiments confirmed the presence of local heterogeneities in this part of the glass at a sub-micrometric spatial scale. Polycrystalline sites were featured by an important shear-force interaction with the probing fiber optic tip, a longer fluorescence decay time and a higher Stark splitting of the 5D07FJ (J = 1 to 4) electronic transitions of the Eu3+ cations. %G English %L cea-02355400 %U https://cea.hal.science/cea-02355400 %~ CEA %~ CNRS %~ DEN %~ UNIV-LORRAINE %~ INC-CNRS %~ LCPME-UL %~ TEST2-HALCNRS