Search Results - "Varela, J.A"

Comparative gas sensor response of SnO2, SnO and Sn3O4 nanobelts to NO2 and potential interferents by Suman, P.H., Felix, A.A., Tuller, H.L., Varela, J.A., Orlandi, M.O.

“…The gas sensor performance of single crystalline tin oxide nanobelts in different oxidation states (SnO2, SnO and Sn3O4), synthesized by a carbothermal…”
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Synthesis by a chemical method and characterization of CaZrO3 powders: Potential application as humidity sensors by André, R.S., Zanetti, S.M., Varela, J.A., Longo, E.

“…CaZrO3 stoichiometric and non-stoichiometric (CaO- and ZrO2-excess) powders were synthesized by a chemical method which is based on polymeric precursors. The…”
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SrMoO4 powders processed in microwave-hydrothermal : Synthesis, characterization and optical properties by SCZANCOSKI, J. C, CAVALCANTE, L. S, JOYA, M. R, VARELA, J. A, PIZANI, P. S, LONGO, E

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β-ZnMoO4 microcrystals synthesized by the surfactant-assisted hydrothermal method: Growth process and photoluminescence properties by Cavalcante, L.S., Sczancoski, J.C., Siu Li, M., Longo, E., Varela, J.A.

“…[Display omitted] ► Monophasic β-ZnMoO4 crystals were synthesized by the hydrothermal method (140°C/8h). ► Growth mechanism of β-ZnMoO4 microcrystals prepared…”
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Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method by Cava, S., Tebcherani, S.M., Souza, I.A., Pianaro, S.A., Paskocimas, C.A., Longo, E., Varela, J.A.

“…Nanocrystalline Al2O3powders have been synthesized by the polymeric precursor method. A study of the evolution of crystalline phases of obtained powders was…”
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Preparation and characterization of ceria nanospheres by microwave-hydrothermal method by Dos Santos, M.L., Lima, R.C., Riccardi, C.S., Tranquilin, R.L., Bueno, P.R., Varela, J.A., Longo, E.

“…Crystalline ceria (CeO 2) nanoparticles have been successfully synthesized by a simple and fast microwave-hydrothermal method at 130 °C for 20 min…”
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Synthesis and characterization of CuO flower-nanostructure processing by a domestic hydrothermal microwave by VOLANTI, D. P, KEYSON, D, CAVALCANTE, L. S, SIMOES, A. Z, JOYA, M. R, LONGO, E, VARELA, J. A, PIZANI, P. S, SOUZA, A. G

“…The synthesis and characterization of CuO flower-nanostructure processed in domestic hydrothermal microwave oven was presented. Phase analysis was carried out…”
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Synthesis, structural refinement and optical behavior of CaTiO3 powders : A comparative study of processing in different furnaces by CAVALCANTE, L. S, MARQUES, V. S, SCZANCOSKI, J. C, ESCOTE, M. T, JOYA, M. R, VARELA, J. A, SANTOS, M. R. M. C, PIZANI, P. S, LONGO, E

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Dielectric and ferroelectric characteristics of barium zirconate titanate ceramics prepared from mixed oxide method by Moura, F., Simões, A.Z., Stojanovic, B.D., Zaghete, M.A., Longo, E., Varela, J.A.

“…Barium zirconium titanate (BZT) ceramics were prepared by mixed oxide method. X-ray diffraction showed the presence of a single phase while Raman scattering…”
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Microwave-hydrothermal synthesis of perovskite bismuth ferrite nanoparticles by Biasotto, G., Simões, A.Z., Foschini, C.R., Zaghete, M.A., Varela, J.A., Longo, E.

“…[Display omitted] ► BiFeO 3 (BFO) nanoparticles were grown by hydrothermal microwave method (HTMW). ► The soaking time is effective in improving phase…”
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Giant Chemo-Resistance of SnO disk-like structures by Suman, P.H., Felix, A.A., Tuller, H.L., Varela, J.A., Orlandi, M.O.

“…Single crystalline SnO micro-disks, synthesized by a carbothermal reduction process, exhibited a nearly 1000-fold increase in resistance upon exposure to…”
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Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr₀.₂₅Ti₀.₇₅]O₃ ceramic by Badapanda, T, Senthil, V, Rout, S.K, Cavalcante, L.S, Simões, A.Z, Sinha, T.P, Panigrahi, S, de Jesus, M.M, Longo, E, Varela, J.A

“…In this work, we report the Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr₀.₂₅Ti₀.₇₅]O₃ ceramic synthesized by solid state…”
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Structure, ferroelectric/magnetoelectric properties and leakage current density of (Bi0.85Nd0.15)FeO3 thin films by SIMOES, A. Z, CAVALCANTE, L. S, MOURA, F, LONGO, E, VARELA, J. A

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Electronic structure and optical properties of BaMoO4 powders by Sczancoski, J.C., Cavalcante, L.S., Marana, N.L., da Silva, R.O., Tranquilin, R.L., Joya, M.R., Pizani, P.S., Varela, J.A., Sambrano, J.R., Siu Li, M., Longo, E., Andrés, J.

“…Barium molybdate (BaMoO4) powders were synthesized by the co-precipitation method and processed in microwave-hydrothermal at 140 ℃ for different times. These…”
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NiTiO3 powders obtained by polymeric precursor method : Synthesis and characterization by LOPES, K. P, CAVALCANTE, L. S, SIMOES, A. Z, VARELA, J. A, LONGO, E, LEITE, E. R

“…Nickel titanate (NiTiO3) powders were synthesized by the polymeric precursor method after thermal treatment at different temperatures for 2 h in air…”
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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…”
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Structural evolution of Eu-doped hydroxyapatite nanorods monitored by photoluminescence emission by André, R.S., Paris, E.C., Gurgel, M.F.C., Rosa, I.L.V., Paiva-Santos, C.O., Li, M.S., Varela, J.A., Longo, E.

“…► Nanorod Eu-doped HA was obtained by using HTMW process without a secondary phase. ► Eu3+ emission can be effective to monitoring the evolution of structural…”
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Preparation of CeO2 by a simple microwave–hydrothermal method by Riccardi, C.S., Lima, R.C., dos Santos, M.L., Bueno, P.R., Varela, J.A., Longo, E.

“…Cerium carbonate hydroxide (orthorhombic Ce(OH)CO3) hexagonal-shaped microplates were synthesized by a simple and fast microwave-hydrothermal method at 150 deg…”
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BaMoO4 powders processed in domestic microwave-hydrothermal : Synthesis, characterization and photoluminescence at room temperature by CAVALCANTE, L. S, SCZANCOSKI, J. C, TRANQUILIN, R. L, JOYA, M. R, PIZANI, P. S, VARELA, J. A, LONGO, E

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Effect of niobium dopant on fatigue characteristics of BiFeO3 thin films grown on Pt electrodes by SIMOES, A. Z, PIANNO, R. F, AGUIAR, E. C, LONGO, E, VARELA, J. A

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