Search Results - "Maia, L. J. Q"

Local structure study of vanadium pentoxide 1D-nanostructures by Avansi, W., Maia, L. J. Q., Ribeiro, C., Leite, E. R., Mastelaro, V. R.

“…Vanadium pentoxide (V 2 O 5 ·nH 2 O) 1D-nanostructures as nanowires and nanorods have been obtained by decomposition of vanadium peroxide in hydrothermal…”
Get full text

Enhanced Eu3+ Emission in Aqueous Phosphotungstate Colloidal Systems: Stabilization of Polyoxometalate Nanostructures by Barbosa, A. J, Maia, L. J. Q, Montanari, B, Gonçalves, R. R, Messaddeq, Y, Ferreira, R. A. S, Carlos, L. D, Ribeiro, S. J. L

“…Luminescent Eu3+-containing polyphosphate−tungstate aqueous colloidal systems were prepared and studied as a function of the relative polyphosphate−tungstate…”
Get full text

Synthesis optimization, structural evolution and optical properties of Y0.9Er0.1Al3(B03)4 nanopowders obtained by soft chemistry methods by MAIA, L. J. Q, FERRARI, C. R, MASTELARO, V. R, HEMANDES, A. C, IBANEZ, A

“…This paper describes the structural evolution of Y0.9Er0.1Al3(BO3)4 nanopowders using two soft chemistry routes, the sol-gel and the polymeric precursor…”
Get full text

Synthesis and characterization of Pb1-xLaxTiO3 nanocrystalline powders by MESQUITA, A, BERNARDI, M. I. B, MAIA, L. J. Q, MASTELARO, V. R

“…Pb1-xLaxTiO3 (PLT) nanocrystalline powders were obtained by polymeric precursor method. The samples were analyzed by differential scanning calorimetry (DSC)…”
Get full text

BaTi1-xZrxO3 nanopowders prepared by the modified pechini method by BERNARDI, M. I. B, ANTONELLI, E, LOURENCO, A. B, FEITOSA, C. A. C, MAIA, L. J. Q, HERNANDES, A. C

“…The results reported here based on a study of BaTi1-xZrxO3 (x=,0.2 and 1) nanometric powders prepared by the modified Pechini method. The powder samples…”
Get full text

Development of oxyfluoroborate glass ceramics doped with Er3+ and Yb3 by Rodríguez Chialanza, M., Keuchkerian, R., Maia, L. J. Q., Carvalho, J. F., Suescun, L., Faccio, R., Fornaro, L.

“…The preparation of oxyfluoroborate glasses and glass–ceramics doped with Yb 3+ and Er 3+ with improved luminescent properties is reported. Glasses with…”
Get full text

Sol-gel preparation of near-infrared broadband emitting Er3+-doped SiO2-Ta2O5 nanocomposite films by FERRARI, J. L, LIMA, K. O, MAIA, L. J. Q, GONCALVES, R. R

“…This article reports a study on the preparation, densification process, and structural and optical properties of SiO2-Ta2O5 nanocomposite films obtained by the…”
Get full text

Active planar waveguides based on sol-gel Er3+-doped SiO2-ZrO2 for photonic applications : Morphological, structural and optical properties by GONCALVES, R. R, GUIMARAES, J. J, FERRARI, J. L, MAIA, L. J. Q, RIBEIRO, S. J. L

Get full text

Er:YAl3(BO3)4 glassy thin films from polymeric precursor and sol-gel methods: Waveguides for integrated optics by MAIA, L. J. Q, MASTELARO, V. R, HERNANDES, A. C, FICK, J, IBANEZ, A

“…This paper presents the characterization of single-mode waveguides for 980 and 1550 nm wavelengths. High quality planar waveguide structure was fabricated from…”
Get full text

Photoexpansion and photobleaching effects in oxysulfide thin films of the GeS2+Ga2O3 system by Mendes, A.C., Maia, L.J.Q., Messaddeq, S.H., Messaddeq, Y., Ribeiro, S.J.L., Siu Li, M.

“…Oxysulfide systems undergo structural transformations upon illumination with laser light of near bandgap energy, as well as chalcogenide materials (glasses and…”
Get full text

Elaboration and optimization of (Y,Er)Al3(BO3)4 glassy planar waveguides through the sol-gel process by MAIA, L. J. Q, FICK, J, BOUCHARD, C, MASTELARO, V. R, HERNANDES, A. C, IBANEZ, A

“…In this work, a sol-gel route was used to prepare Y0.9Er0.1Al3(BO3)4 glassy thin films by spin-coating technique looking for the preparation and optimization…”
Get full text

Er3+-doped germanate glasses for active waveguides prepared by Ag+/K+ ↔ Na+ ion-exchange by BARBOSA, A. J, MAIA, L. J. Q, NASCIMENTO, A. M, GONCALVES, R. R, POIRIER, G, MESSADDEQ, Y, RIBEIRO, S. J. L

Get full text

Synthesis and thermal decomposition of SrTi1−x Fe x O3 (0.0 ≤ x ≤ 0.1) powders obtained by the polymeric precursor method by da Silva, L. F., Bernardi, M. I. B., Maia, L. J. Q., Frigo, G. J. M., Mastelaro, V. R.

“…This work reports on the synthesis of a SrTi1-x Fe x O3 nanostructured compound (0.0 <= x <= 0.1) using a modified polymeric precursor method. The effect of…”
Get full text

Synthesis and thermal decomposition of SrTi1−xFexO3 (0.0 ≤ x ≤ 0.1) powders obtained by the polymeric precursor method by da Silva, L. F., Bernardi, M. I. B., Maia, L. J. Q., Frigo, G. J. M., Mastelaro, V. R.

“…This work reports on the synthesis of a SrTi 1− x Fe x O 3 nanostructured compound (0.0 ≤  x  ≤ 0.1) using a modified polymeric precursor method. The effect of…”
Get full text

Synthesis and optical properties of the crystalline phase Tb2TeO6 by Ferreira, K.D., Maia, L.J.Q., Gasparotto, G., Carvalho, J.F.

“…Tb2TeO6 crystalline phase was prepared by solid-state reaction synthesis, presenting an orthorhombic structure with lattice parameters a = 5.2907(2) Å,…”
Get full text

Structural and spectroscopic properties of Eu3+ doped Y4Al2O9 compounds through a soft chemical process by Gasparotto, G., Tavares, L.S., Silva, T.C., Maia, L.J.Q., Carvalho, J.F.

“…The present work reports on the synthesis, structural and optical properties of (Y1-xEux)4Al2O9 powders, with x ranging from 0.001 to 0.030. We prepared the…”
Get full text

Blue photoluminescence behavior in TmxY1−xAl3(BO3)4 nanopowders and structural correlations by Pimenta, J.O., Fabris, Z.V., Maia, L.J.Q.

“…We report the intense blue photoluminescence emissions of Tm:YAB and TmAB nanoparticles under ultraviolet excitation, and we propose an emission energy diagram…”
Get full text

Eu-doped ZnO nanoparticles prepared by the combustion reaction method: Structural, photoluminescence and dielectric characterization by Pessoni, H.V.S., Maia, L.J.Q, Franco, A.

“…In the present study, we report the structural, photoluminescence (PL) and dielectric characterization of nanoparticles of Eu-doped ZnO (Zn1−xEuxO) with x = 0,…”
Get full text

Role of crystallinity on the optical properties of Na2V6O16·3H2O nanowires by Avansi, W., Maia, L.J.Q., Mourão, H.A.J.L., Ribeiro, C.

“…It is known that optical properties depend on crystalline structures, feature that can significantly affect materials such as vanadates, since their lamellar…”
Get full text

Phase stability and properties of Bi6Te2O13+δ (δ = 0 or 2) by Ferreira, K.D., Gasparotto, G., Maia, L.J.Q., Reis, S.P., Araújo, E.B., Carvalho, J.F.

“…The crystalline Bi6Te2O15 and Bi6Te2O13 phases with orthorhombic and cubic symmetries, respectively, were synthesized by solid-state reaction synthesis. A…”
Get full text