Search Results - "Mastelaro, V R"

Cluster Coordination and Photoluminescence Properties of α‑Ag2WO4 Microcrystals by Cavalcante, L. S, Almeida, M. A. P, Avansi, W, Tranquilin, R. L, Longo, E, Batista, N. C, Mastelaro, V. R, Li, M. Siu

“…In this paper, we report our initial research to obtain hexagonal rod-like elongated silver tungstate (α-Ag2WO4) microcrystals by different methods…”
Get full text

Effect of different strontium precursors on the growth process and optical properties of SrWO4 microcrystals by Sczancoski, J. C, Avansi, W, Costa, M. G. S, Siu Li, M, Mastelaro, V. R, Santos, R. S, Longo, E, Cavalcante, L. S

“…In this paper, an experimental study was performed on the effect induced by different strontium precursors in the growth processes and optical properties of…”
Get full text

Strong violet-blue light photoluminescence emission at room temperature in SrZrO3 : Joint experimental and theoretical study by LONGO, V. M, CAVALCANTE, L. S, VARELA, J. A, LONGO, Elson, ERLO, R, MASTELARO, V. R, DE FIGUEIREDO, A. T, SAMBRANO, J. R, DE LAZARO, S, FREITAS, A. Z, GOMES, L, VIEIRA, N. D

“…Ultrafine ordered and disordered SrZrO3 powders were prepared by the polymeric precursor method. The structural evolution from structural disorder to order was…”
Get full text

Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O3 powders by SCZANCOSKI, J. C, CAVALCANTE, L. S, BADAPANDA, T, ROUT, S. K, PANIGRAHI, S, MASTELARO, V. R, VARELA, J. A, SIU LI, M, LONGO, E

“…[Ba1-x Y2x/3](Zr0.25Ti0.75)O3 powders with different yttrium concentrations (xaa=aa0, 0.025 and 0.05) were prepared by solid state reaction. These powders were…”
Get full text

Local order of Pb1−xLaxZr0.40Ti0.60O3 ferroelectric ceramic materials probed by X-ray absorption and Raman spectroscopies by Mesquita, A., Michalowicz, A., Pizani, P.S., Provost, K., Mastelaro, V.R.

“…•Structural characterization of Pb1−xLaxZr0.40Ti0.60O3 (PLZT) ferroelectric ceramic.•X-ray absorption and Raman spectroscopies were used to probe the structure…”
Get full text

Intense blue and green photoluminescence emissions at room temperature in barium zirconate powders by Cavalcante, L.S., Sczancoski, J.C., Espinosa, J.W.M., Mastelaro, V.R., Michalowicz, A., Pizani, P.S., De Vicente, F.S., Li, M.S., Varela, J.A., Longo, E.

“…Intense blue and green photoluminescence (PL) emissions were observed at room temperature in barium zirconate (BaZrO 3) powders prepared by chemical method…”
Get full text

Femtosecond laser processing of glassy and polymeric matrices containing metals and semiconductor nanostructures by Almeida, J.M.P., Tribuzi, V., Fonseca, R.D., Otuka, A.J.G., Ferreira, P.H.D., Mastelaro, V.R., Brajato, P., Hernandes, A.C., Dev, A., Voss, T., Correa, D.S., Mendonca, C.R.

“…•Femtosecond laser processing of new hybrid nanomaterials.•Microfabrication of polymeric structures containing Au nanoparticles and ZnO nanowires.•Production…”
Get full text

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

Local electronic structure, optical bandgap and photoluminescence (PL) properties of Ba(Zr0.75Ti0.25)O3 powders by Cavalcante, L.S., Batista, N.C., Badapanda, T., Costa, M.G.S., Li, M.S., Avansi, W., Mastelaro, V.R., Longo, E., Espinosa, J.W.M., Gurgel, M.F.C.

“…Ba(Zr0.75Ti0.25)O3 (BZT-75/25) powders were synthesized by the polymeric precursor method. Samples were structurally characterized by X-ray diffraction (XRD),…”
Get full text

Influence of Structural Disorder on the Photoluminescence Emission of PZT Powders by Longo, E, de Figueiredo, A. T, Silva, M. S, Longo, V. M, Mastelaro, V. R, Vieira, N. D, Cilense, M, Franco, R. W. A, Varela, J. A

“…Intense and broad visible photoluminescent (PL) band was observed at room temperature in disordered Pb(Zr0,53Ti0,47)O3 powders. Structural order−disorder was…”
Get full text

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO2 Nanocrystals by Moreno, H., Domingues, G. L., Assis, M., Ortega, P. P., Mastelaro, V.R., Ramirez, M. A., Simões, A. Z.

“…In this work, we focus on understanding the morphology and photocatalytic properties of CeO2 nanocrystals (NCs) synthesized via a microwave-assisted…”
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

One-step controllable synthesis of three-dimensional WO3 hierarchical architectures with different morphologies decorated with silver nanoparticles: enhancing the photocatalytic activity by Capeli, R A, Dalmaschio, C J, Teixeira, S R, Mastelaro, V R, Chiquito, A J, Longo, E, Pontes, F M

“…Hierarchical architecture self-assembled three-dimensional WO3 and WO3·Ag with high uniformity have been successfully obtained using peroxopolytungstic acid as…”
Get full text

Hydrothermal Microwave: A New Route to Obtain Photoluminescent Crystalline BaTiO3 Nanoparticles by Moreira, M. L, Mambrini, G. P, Volanti, D. P, Leite, E. R, Orlandi, M. O, Pizani, P. S, Mastelaro, V. R, Paiva-Santos, C. O, Longo, E, Varela, J. A

“…Hydrothermal microwave method was used as a new route to synthesize pure BaTiO3 (BT) nanoparticles at 140°C for 10 min under rapid reacting with stoichiometric…”
Get full text

GaAs Semiconductor Passivated by (NH4)2Sx: Analysis of Different Passivation Methods Using Electrical Characteristics and XPS Measurements by Mahmoodnia, H., Salehi, A., Mastelaro, V. R.

“…Some of the III – V semiconductor used in various devices suffer from the surface high density of states limiting their application. This study compares and…”
Get full text

X-ray powder diffraction structural characterization of Pb1 − xBaxZr0.65Ti0.35O3 ceramic by Mir, M., Mastelaro, V. R., Neves, P. P., Doriguetto, A. C., Garcia, D., Lente, M. H., Eiras, J. A., Mascarenhas, Y. P.

“…The structure of Pb1 − xBaxZr0.65Ti0.35O3 (PBZT) ceramic materials with 0.00 ≤x≤ 0.40 was studied using synchrotron X‐ray powder diffraction data. According to…”
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

Effect of hydrothermal temperature on the antibacterial and photocatalytic activity of WO3 decorated with silver nanoparticles by Capeli, R. A., Belmonte, T., Caierão, J., Dalmaschio, C. J., Teixeira, S. R., Mastelaro, V. R., Chiquito, A. J., Teodoro, M. D., Domenegueti, J. F. M., Longo, E., Trindade, L. G., Pontes, F. M.

“…We studied the catalytic and antimicrobial properties of hierarchical architecture of WO 3 .Ag synthesized at 100, 150, and 200 °C by a very simple and…”
Get full text

Atomic pair distribution function at the Brazilian Synchrotron Light Laboratory: application to the Pb1–xLaxZr0.40Ti0.60O3 ferroelectric system by Saleta, M. E., Eleotério, M., Mesquita, A., Mastelaro, V. R., Granado, E.

“…This work reports the setting up of the X‐ray diffraction and spectroscopy beamline at the Brazilian Synchrotron Light Laboratory for performing total…”
Get full text

Ozone detection in the ppt-level with rGO-ZnO based sensor by de Lima, B.S., Komorizono, A.A., Silva, W.A.S., Ndiaye, A.L., Brunet, J., Bernardi, M.I.B., Mastelaro, V.R.

“…[Display omitted] •This article presents an innovative approach for the development of rGO/SMOx-based for gas sensing applications.•The nanocomposite material…”
Get full text