Luminescence of Eu^3+ ions during thermal densification of SiO_2 gel

This paper compares the luminescence spectra of Eu 3+ in sol-gel derived silica samples heated at different temperatures, following the densification process from wet gel to compact silica glass. Lifetimes, linewidths, and Stark splittings of the transitions were used to study the structural evolution of the gel network.

[1]  Dumas,et al.  Low-frequency Raman scattering from fractal vibrational modes in a silica gel. , 1986, Physical review letters.

[2]  Lisa C. Klein,et al.  Sol-Gel Technology for Thin Films, Fibers, Preforms, Electronics and Specialty Shapes , 1988 .

[3]  Renata Reisfeld,et al.  Fluorescence of europium(III) trapped in silica gel-glass as a probe for cation binding and for changes in cage symmetry during gel dehydration , 1984 .

[4]  Yoshio Hasegawa,et al.  Synthesis of continuous silicon carbide fibre with high tensile strength and high Young's modulus , 1978 .

[5]  A. Pegoretti,et al.  Vickers Crack Nucleation of Glass Sheets Coated by Thin Silica Gel Layers , 1989 .

[6]  M. Schneider,et al.  Porous silicate beads by gelation , 1988 .

[7]  T. Woignier,et al.  Monolithic aerogels in the systems SiO2B2O3, SiO2P2O5, SiO2B2O3P2O5 , 1984 .

[8]  Pelous,et al.  Structure and self-similarity of silica aerogels. , 1988, Physical review. B, Condensed matter.

[9]  G. Scherer,et al.  Viscoelasticity in silica gel , 1988 .

[10]  Schaefer,et al.  Structure of random porous materials: Silica aerogel. , 1986, Physical review letters.

[11]  A. Wold.  The preparation and characterization of materials , 1980 .

[12]  J. Lehn,et al.  [Eu ⊂ bpy·bpy·bpy]+ cryptate: Luminescence and conformation , 1988 .

[13]  C. Rao,et al.  Synthesis of complex metal oxides by novel routes , 1987 .

[14]  G. Sorarù,et al.  Influence of sol-gel coatings on crack initiation by vickers indentation in soda-lime glass , 1988 .

[15]  Alicia Durán,et al.  Optical properties of glass coatings containing Fe and Co , 1986 .

[16]  R. Reisfeld.  Spectroscopy and applications of molecules in glasses , 1990 .

[17]  B. Champagnon,et al.  Gel to glass transformation of silica , 1990 .

[18]  F. Orgaz,et al.  Coloured coatings prepared by the sol-gel process , 1986 .

[19]  S. Enzo,et al.  Phase separation in gel-derived materials, separation and crystallization of SnO_2 within an amorphous SiO_2 matrix , 1992 .

[20]  Maurice W. Windsor,et al.  Luminescence and Energy Transfer in Solutions of Rare‐Earth Complexes. I. Enhancement of Fluorescence by Deuterium Substitution , 1965 .

[21]  R. Reisfeld,et al.  Transition probabilities of europium in phosphate glasses , 1971 .

[22]  M. Guglielmi,et al.  Interactions with Portland cement paste of glass fibres coated by the sol-gel method , 1986 .

[23]  S. Nathanson,et al.  Energy transfer from adenosine 5'-triphosphate to europium and interaction between europium and adenosine 5'-triphosphate and adenosine 5'-monophosphate at room temoperature , 1976 .

[24]  A. Rousset,et al.  Preparation and properties of active submicronic solids and new metastable phases obtained via a metal-organic precursor method , 1986 .

[25]  J. Lierop,et al.  Preparation of dried monolithic SiO2 gel bodies by an autoclave process , 1986 .

[26]  S. Yajima,et al.  Synthesis of continuous silicon carbide fibre with high tensile strength and high Young's modulus , 1978 .

[27]  J. Mackenzie,et al.  Nd-doped silica glass I: Structural evolution in the sol-gel state , 1988 .

[28]  C. Brinker.  Sol-gel science , 1990 .

[29]  W. Horrocks,et al.  Lanthanide ion luminescence probes of the structure of biological macromolecules , 1981 .

[30]  R. Macfarlane,et al.  Spectroscopy of solids containing rare earth ions , 1987 .

[31]  T. Belliveau,et al.  On the coordination environment of rare earth ions in oxide glasses: Calcium titanosilicate and sodium aluminosilicate glasses , 1989 .

[32]  J. Capobianco,et al.  Site selective spectroscopy and crystal field analysis of Eu3+ doped lanthanum–calcium–zirconium–silicon borate , 1989 .

[33]  E. Matijević,et al.  Monodispersed metal (hydrous) oxides - a fascinating field of colloid science , 1981 .

[34]  S. Teichner.  Aerogels of Inorganic Oxides , 1986 .

[35]  G. Scherer.  Correction of ``drying gels: I. General theory'' , 1987 .

[36]  R. Orbach,et al.  Fractal Phenomena in Disordered Systems , 1989 .

[37]  G. Blasse,et al.  Rare-earth ions adsorbed onto porous glass: luminescence as a characterizing tool , 1990 .

[38]  S. Dirè,et al.  Inorganic gels for immobilization of biocatalysts: inclusion of invertase-active whole cells of yeast (saccharomyces cerevisiae) into thin layers of SiO2 gel deposited on glass sheets , 1989 .

[39]  G. Carturan,et al.  Preparation of supports for catalysis by the “gel route” , 1984 .

[40]  A. Paccagnella,et al.  Durability against Ca(OH)2 attack of soda-lime glasses coated by various gel-deposited oxides , 1989 .

[41]  P. Porcher,et al.  Influence of J-mixing on the phenomenological interpretation of the Eu3+ ion spectroscopic properties , 1980 .

[42]  C. Brecher,et al.  Laser-induced fluorescence line narrowing in Eu glass: a spectroscopic analysis of coordination structure , 1976 .

[43]  Pelous,et al.  Brillouin-scattering measurements of phonon-fracton crossover in silica aerogels. , 1987, Physical review letters.

[44]  G. Burdick,et al.  A new contribution to spin‐forbidden rare earth optical transition intensities: Gd3+ and Eu3+ , 1988 .

[45]  F. Aldinger,et al.  The Importance of Chemistry in the Development of High‐Performance Ceramics , 1987 .

[46]  F. Babonneau,et al.  Dimethyldiethoxysilane/tetraethoxysilane copolymers: precursors for the silicon-carbon-oxygen system , 1989 .

[47]  I. Zschokke,et al.  Optical Spectroscopy of Glasses , 1986 .