Author
Alexandre Zirpoli Simões
Other affiliations: Universidade Federal de Itajubá
Bio: Alexandre Zirpoli Simões is an academic researcher from Sao Paulo State University. The author has contributed to research in topics: Thin film & Ferroelectricity. The author has an hindex of 36, co-authored 194 publications receiving 4262 citations. Previous affiliations of Alexandre Zirpoli Simões include Universidade Federal de Itajubá.
Papers published on a yearly basis
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TL;DR: In this article, the synthesis and characterization of CuO flower-nanostructure processed in domestic hydrothermal microwave oven was presented and phase analysis was carried out using X-ray diffraction (XRD) and micro-Raman scattering (MRS).
236 citations
TL;DR: Barium zirconium titanate (BZT) ceramics were prepared by mixed oxide method and X-ray diffraction showed the presence of a single phase while Raman scattering confirmed structural transitions as a function of different Zr/Ti ratio as mentioned in this paper.
153 citations
TL;DR: The structural evolution of NiTiO3 phase was accompanied by X-ray diffraction and Fourier transform Raman spectroscopy by scanning electron microscopy was revealed the agglomerated nature of very fine particles.
114 citations
TL;DR: In this paper, a combined experimental and theoretical study was conducted to analyze the photoluminescence properties of ordered and disordered CaWO4 and CaMoO4 powders.
Abstract: A combined experimental and theoretical study was conducted to analyze the photoluminescence (PL) properties of ordered and disordered CaWO4 (CW) and CaMoO4 (CM) powders. Two mechanisms were found to be responsible for photoluminescence emission in CW and CM powders. The first one, in the disordered powders, was caused by oxygen complex vacancies [MO3∙VOx], [MO3∙VO•] and [MO3∙VO••], where M=W or Mo, which leads to additional levels in the band gap. The second mechanism, in ordered powders, was caused by an intrinsic slight distortion of the [WO4] or [MoO4] tetrahedral in the short range.
99 citations
TL;DR: In this paper, the Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr0.25Ti0.75]O3 ceramic synthesized by solid state reaction were reported.
95 citations
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28,685 citations
Journal Article•
TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON
13,333 citations
TL;DR: In this article, the authors show that hierarchical and hollow oxide nanostructures increase both the gas response and response speed simultaneously and substantially, which can be explained by the rapid and effective gas diffusion toward the entire sensing surfaces via the porous structures.
Abstract: Hierarchical and hollow oxide nanostructures are very promising gas sensor materials due to their high surface area and well-aligned nanoporous structures with a less agglomerated configurations. Various synthetic strategies to prepare such hierarchical and hollow structures for gas sensor applications are reviewed and the principle parameters and mechanisms to enhance the gas sensing characteristics are investigated. The literature data clearly show that hierarchical and hollow nanostructures increase both the gas response and response speed simultaneously and substantially. This can be explained by the rapid and effective gas diffusion toward the entire sensing surfaces via the porous structures. Finally, the impact of highly sensitive and fast responding gas sensors using hierarchical and hollow nanostructures on future research directions is discussed.
1,330 citations
TL;DR: A comprehensive review of recent synthetic methods along with associated synthesis mechanisms, characterization, fundamental properties, and promising applications of Cupric oxide (CuO) nanostructures is presented in this article.
1,030 citations