Listar por autoría "02f719e7-1f13-43b8-98fa-c86c7caf2072"
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Computational Chemistry Meets Experiments for Explaining the Geometry, Electronic Structure, and Optical Properties of Ca10V6O25
Teixeira, Mayara Mondego; Oliveira, Regiane; Carvalho de Oliveira, Marisa; Ribeiro, Renan; de Lazaro, Sergio Ricardo; Li, Maximo Siu; Chiquito, Adenilson J.; Gracia, Lourdes; Andres, Juan; Longo, Elson American Chemical Society (2018-11)In this paper, we present a combined experimental and theoretical study to disclose, for the first time, the structural, electronic, and optical properties of Ca10V6O25 crystals. The microwave-assisted hydrothermal (MAH) ... -
Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystals
La Porta, Felipe A.; Andres, Juan; Vismara, M. V. G.; Graeff, C. F. O.; Sambrano, Julio; Li, Maximo Siu; Varela, José A.; Longo, Elson Royal Society of Chemistry (2014-10)The correlation between structural and electronic order–disorder effects in understanding the optical properties of flower-like ZnO nanocrystals synthesized by the microwave-assisted hydrothermal method at low temperatures ... -
Designing biocompatible and multicolorfluorescent hydroxyapatitenanoparticles for cell-imaging applications
Machado, Thales Rafael; Leite, I. S.; Inada, N. M.; Li, Maximo Siu; Da Silva, J. S.; Andres, Juan; Beltrán Mir, Héctor; Cordoncillo, Eloisa; Longo, Elson Elsevier (2019)In recent years, there has been a growing effort toward the synthesis, engineering and property tuning of biocompatible nanoparticles (NPs) that can be detected by confocal microscopy and then used as fluorescent probes. ... -
Identifying and rationalizing the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations
Fabbro, Maria T.; Saliby, Carla; Rios, Larissa R.; La Porta, Felipe A.; Gracia, Lourdes; Li, Maximo Siu; Andres, Juan; Santos, Luís P. S.; Longo, Elson IOP Publishing (2015-11)We present a combined theoretical and experimental study on the morphological, structural, and optical properties of β-Ag2MoO4 microcrystals. β-Ag2MoO4 samples were prepared by a co-precipitation method. The nucleation and ... -
Photoluminescent behavior of SrZrO<sub>3</sub>/SrTiO<sub>3</sub> multilayer thin films
Moreira, Mario Lucio; Andres, Juan; Longo, V. M.; Li, Maximo Siu; Varela, José A.; Longo, Elson Elsevier (2009)A detailed investigation was made into the origin of photoluminescence in an alternate multilayer system of SrZrO<sub>3</sub> (SZO) and SrTiO<sub>3</sub> (STO) thin films. XRD and room-temperature PL studies revealed a ... -
Photoluminescent properties of ZrO2: Tm3+, Tb3+, Eu3+ powdersd-A combined experimental and theoretical study
Lovisa, L. X.; Andres, Juan; Gracia, Lourdes; Li, Maximo Siu; Paskocimas, C. A.; Bomio, M. R. D.; Araújo, Vinícius Dantas; Longo, Elson; Motta, F. V. Elsevier (2017-02)Rare-earth (RE) element-based materials for optical applications have received increasing attention owing to the emission properties of RE ions, which render these materials suitable for use in color displays, lasers, and ... -
Presence of excited electronic state in CaWO4 crystals provoked by a tetrahedral distortion: An experimental and theoretical investigation.
Beltran, Armando; Andres, Juan; Gracia, Lourdes; Longo, V. M.; Cavalcante, Laécio Santos; Avansi, Waldir; Li, Maximo Siu; Mastelaro, Valmor Roberto; Varela, José A.; Longo, Elson © American Institute of Physics (2011-08)By combining experimental techniques such as x-ray diffraction, Fourier transform Raman, ultraviolet-visible, x-ray absorption near edge structure, extended x-ray absorption fine structure spectroscopy, and theoretical ... -
SnO2 nanocrystals synthesized by microwave-assisted hydrothermal method: towards a relationship between structural and optical properties
Mendes, Paulo G.; Moreira, Mario Lucio; Tebcherani, Sergio M.; Orlandi, Marcelo; Andres, Juan; Li, Maximo Siu; Diaz Mora, Nora; Varela, José A.; Longo, Elson Springer Netherlands (2012-02)The exploration of novel synthetic methodologies that control both size and shape of functional nanostructure opens new avenues for the functional application of nanomaterials. Here, we report a new and versatile approach ... -
Structure, morphology and photoluminescence emissions of ZnMoO4: RE 3+=Tb3+ - Tm3+ - X Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles obtained by the sonochemical method
Lovisa, L. X.; Oliveira, M. C.; Andres, Juan; Gracia, Lourdes; Li, Maximo Siu; Longo, Elson; Tranquilin, R. L.; Paskocimas, C. A.; Bomio, M. R. D.; Motta, F. V. Elsevier (2018-06)ZnMoO4 and ZnMoO4: RE3+ = 1% Tb3+, 1% Tm3+, x Eu3+ (x = 1, 1.5, 2, 2.5 and 3 mol%) particles were prepared by a sonochemical method. The influence of the dopant content on photoluminescent behavior was investigated. The ... -
Synthesis of wurtzite ZnS nanoparticles using the microwave assisted solvothermal method
La Porta, Felipe A.; Ferrer, Mateus M.; Santana, Yuri V.B. de; Raubach, Cristiane W.; Longo, V. M.; Sambrano, Julio; Longo, Elson; Andres, Juan; Li, Maximo Siu; Varela, José A. Elsevier (2013-04)In this article, we report the development of an efficient and rapid microwave assisted solvothermal (MAS) method to prepare wurtzite ZnS nanoparticles at 413 K using different precursors. The materials obtained were ... -
Understanding the White-Emitting CaMoO4 Co-Doped Eu3+, Tb3+, and Tm3+ Phosphor through Experiment and Computation
Tranquilin, R. L.; Lovisa, L. X.; Almeida, C. R. R.; Paskocimas, Carlos Alberto; Li, Maximo Siu; Oliveira, M. C.; Gracia, Lourdes; Andres, Juan; Longo, Elson; Motta, F. V.; Bomio, Mauricio American Chemical Society (2019-07-09)In this article, the synthesis by means of the spray pyrolysis method, of the CaMoO4 and rare-earth cation (RE3+)-doped CaMoO4:xRE3+ (RE3+ = Eu3+, Tb3+, and Tm3+; and x = 1, 2, and 4% mol) compounds, is presented. The ... -
Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide
La Porta, Felipe A.; Andres, Juan; Li, Maximo Siu; Sambrano, Julio; Varela, José A.; Longo, Elson Royal Society of Chemistry (2014)The influence of tetrabutylammonium hydroxide on the phase composition (cubic zinc blende versus hexagonal wurtzite) of ZnS nanoparticles was studied. The ZnS nanoparticles were prepared by a microwaveassisted solvothermal ... -
α- and β-AgVO3 polymorphs as photoluminescent materials: An example of temperature-driven synthesis
Oliveira, Regiane; Teixeira, Mayara Mondego; Costa, João Paulo C.; Penha, Maya; Francisco, Eric Mark; da Silva, Jussara Soares; Li, Maximo Siu; Longo, Elson; Gracia, Lourdes; Andres, Juan Elsevier (2018-04-15)Controlling the synthesis of a given polymorph of an inorganic material is a further step in the design of property and function. In this letter, we report for the first time a simple procedure to effectively control the ...