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Electrochemical Properties of Oxo-Manganese Complex Biomimicking Enzyme Active Sites and Its Electrocatalytic Application for Dopamine Determination

17 de janeiro de 2013 Rose Portasio 0

Writers: C. S. Martin, M. F. S. Teixeira Keywords: Oxo–manganese complex; Electrochemical behavior; Enzymatic biomimicking; Electrocatalysis; Dopamine Abstract: This work describes the characterization of the [Mn2IV,IVO2(terpy)2(H2O)2]4+ complex in aqueous solution by UV–vis spectrophotometry, cyclic voltammetry, and linear sweep voltammetry with a rotating disk electrode. The pH effect, potential […]

Intense photoluminescence emission at room temperature in calcium copper titanate powders

14 de janeiro de 2013 CDMF 0

Writers: F. Moura; A.Z.Simões; R.C.Deus; M.R.Silva; J.A.Varela; E.Longo Keywords: A. Ceramics; B. Chemical syntheses; B. Powder metallurgy; C. X-ray diffraction Abstract: A study was undertaken about the structural and photoluminescent properties at room temperature of […]

Influence of the pH on Al2O3CuO pigments prepared by a polymeric precursor method

10 de janeiro de 2013 CDMF 0

Writers: Carolina Hernandes Marques; Alexandre Mesquita; Vinicius Dantas Araújo; Maria Inês Basso Bernardi Keywords: Al2O3:CuO; pigments; polymeric precursor method Abstract: Copper (II) aluminate, CuAl2O4, which is known to be an inverse spinel contains a d9 […]

Magnetic characteristics of nanocrystalline GaMnN films deposited by reactive sputtering

29 de dezembro de 2012 CDMF 0

Writers: D.M.G. Leite; A.L.J. Pereira; W.A. Iwamoto; P.G. Pagliuso; P.N. Lisboa-Filho; J.H.D. da Silva Keywords: Sputtering; GaMnN; Nanocrystalline material; Diluted magnetic semiconductor; Magnetic properties Abstract: The magnetic characteristics of Ga1−xMnxN nanocrystalline films (x = 0.08 and x = 0.18), […]

Morphotropic phase boundary and electrical properties of 1−x[Bi0.5Na0.5]TiO3 –xBa[Zr0.25Ti0.75]O3 lead-free piezoelectric ceramics

28 de dezembro de 2012 CDMF 0

Writers: B. Parija; T.Badapanda; S.K.Rout; L.S.Cavalcante; S.Panigrahi; E.Longo; N.C. Batista; T.P.Sinha Keywords: C. Electrical property; Rietveld refinement; Raman spectroscopy; Phase boundaries Abstract: Lead-free solid solutions (1−x)Bi0.5Na0.5TiO3 (BNT)–xBaZr0.25Ti0.75O3 (BZT) (x=0, 0.01, 0.03, 0.05, and 0.07) were […]

Influence of the network modifier on the characteristics of MSnO3 (M=Sr and Ca) thin films synthesized by chemical solution deposition

26 de dezembro de 2012 CDMF 0

Writers: M.C.F. Alves; R.M.M. Marinho; G.P. Casali; M. Siu-Li; S. Députier; M. Guilloux-Viry; A.G. Souza; E. Longo; I.T. Weber; I.M.G. Santos Keywords: Perovskite; Stannates; Chemical solution deposition; Polymeric precursor method; Epitaxial growth; Photoluminescence Abstract: CaSnO3 […]

Preparation and photoluminescence characteristics of In(OH)3:xTb3+ obtained by Microwave-Assisted Hydrothermal method

28 de novembro de 2012 CDMF 0

Writers: F.V. Motta; A.P.A. Marques; M.S. Li; M.F.C. Abreu; C.A. Paskocimas; M.R.D. Bomio; R.P. Souza; J.A. Varela; E. Longo Keywords: Indium hydroxide; Terbium; Microwave-Assisted Hydrothermal Abstract: Crystalline terbium-doped indium hydroxide structures were prepared by a […]

Influence of mineralizer agents on the growth of crystalline CeO2 nanospheres by the microwave-hydrothermal method

26 de novembro de 2012 CDMF 0

Writers: R.C. Deus; M. Cilense; C.R. Foschini; M.A. Ramirez; E. Longo; A.Z. Simões Keywords: Nanoparticle; Chemical synthesis; Microwave; Electron microscopy; Crystal structure Abstract: Cystalline ceria (CeO2) nanoparticles have been synthesized by a simple and fast […]

The Role of Hierarchical Morphologies in the Superior Gas Sensing Performance of CuO-Based Chemiresistors

21 de novembro de 2012 CDMF 0

Writers: Diogo P. Volanti, Anderson A. Felix, Marcelo O. Orlandi, George Whitfi eld, Dae-Jin Yang, Elson Longo, Harry L. Tuller and José A. Varela Keywords: copper(II) oxide; gas sensors; morphology; urchin-like structures; semiconductors Abstract: The […]

CO2 adsorption on polar surfaces of ZnO

29 de outubro de 2012 Rose Portasio 0

Writers: Sergio A. S. Farias. E. Longo, R. Gargano, João B. L. Martins Keywords: CO2 adsorption; Electronic localization function; First principles; Plane wave; ZnO Abstract: Physical and chemical adsorption of CO2 on ZnO surfaces were studied by means […]

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