V
Valeria M. Longo
Researcher at Sao Paulo State University
Publications - 53
Citations - 3229
Valeria M. Longo is an academic researcher from Sao Paulo State University. The author has contributed to research in topics: Photoluminescence & Density functional theory. The author has an hindex of 32, co-authored 53 publications receiving 2892 citations. Previous affiliations of Valeria M. Longo include University of São Paulo & Federal University of São Carlos.
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Journal ArticleDOI
Electronic structure, growth mechanism and photoluminescence of CaWO4 crystals
Laécio S. Cavalcante,Valeria M. Longo,Júlio C. Sczancoski,Marcio Aurélio Pinheiro Almeida,Alzir A. Batista,José Arana Varela,Marcelo Ornaghi Orlandi,Elson Longo,M. Siu Li +8 more
TL;DR: In this paper, aggregated CaWO4 micro- and nanocrystals were synthesized by the co-precipitation method and processed under microwave-assisted hydrothermal/solvothermal conditions (160 °C for 30 min).
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Structural and optical properties of CaTiO3 perovskite-based materials obtained by microwave-assisted hydrothermal synthesis: An experimental and theoretical insight
Mário Lúcio Moreira,Elaine C. Paris,Gabriela do Nascimento,Valeria M. Longo,Julio R. Sambrano,Valmor Roberto Mastelaro,Maria Inês Basso Bernardi,Juan Andrés,José Arana Varela,Elson Longo +9 more
TL;DR: In this article, CaTiO3 powders were synthesized using both a polymeric precursor method (CTref) and a microwave-assisted hydrothermal (CTHTMW) method in order to compare the chemical and physical properties of the perovskite-based material as a function of the synthesis method.
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Structural conditions that leads to photoluminescence emission in SrTiO3: An experimental and theoretical approach
Valeria M. Longo,A. T. de Figueiredo,S.R. de Lazaro,Maria Fernanda do Carmo Gurgel,M. G. S. Costa,Carlos O. Paiva-Santos,José Arana Varela,Elson Longo,Valmor Roberto Mastelaro,F. S. De Vicente,Antônio Carlos Hernandes,Roberto Weider de Assis Franco +11 more
TL;DR: In this article, electron paramagnetic resonance spectroscopy was used to confirm the presence of photoluminescence in disordered powders, in terms of band diagram, density of states, and electronic charges.
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Strong violet–blue light photoluminescence emission at room temperature in SrZrO3: Joint experimental and theoretical study
Valeria M. Longo,Laécio S. Cavalcante,R. Erlo,Valmor Roberto Mastelaro,A. T. de Figueiredo,Julio R. Sambrano,S.R. de Lazaro,Anderson Zanardi de Freitas,Laércio Gomes,Nilson Dias Vieira,José Arana Varela,Elson Longo +11 more
TL;DR: In this article, the structural evolution from structural disorder to order was monitored by X-ray diffraction and near-edge spectroscopy using high-level quantum mechanical calculations within the density functional theory framework.
Journal ArticleDOI
Hierarchical Assembly of CaMoO4 Nano-Octahedrons and Their Photoluminescence Properties
Valeria M. Longo,Laécio S. Cavalcante,Elaine C. Paris,Júlio C. Sczancoski,P. S. Pizani,Máximo Siu Li,Juan Andrés,Elson Longo,José Arana Varela +8 more
TL;DR: In this article, hierarchical assemblies of CaMoO4 nano-octahedrons were obtained by microwave-assisted hydrothermal synthesis at 120 °C for different times, and these structures were structurally, morphologically and syntactically stable.