Listar por autoría "5b6ef1f9-c5e4-4e83-8e77-0551f524e570"
Mostrando ítems 1-14 de 14
-
A description of the formation and growth processes of CaTiO3 mesocrystals: a joint experimental and theoretical approach
Moreira, Mario Lucio; Bordin, José Rafael; Andres, Juan; Varela, José A.; Longo, Elson Royal Society of Chemistry (2020)In this paper, we report on a combined experimental and theoretical study conducted in order to rationalize the formation and growth mechanism of CaTiO3 mesocrystals through the microwave-assisted hydrothermal synthesis ... -
Fingerprints of Short-Range and Long-Range Structure in BaZr1−xHfxO3 Solid Solutions: An Experimental and Theoretical Study
Uarth Fassbender, Rafael; Strelow Lilge, Tatiane; Cava, Sergio; Andres, Juan; Da Silva, Luis F.; Mastelaro, Valmor Roberto; Longo, Elson; Moreira, Mario Lucio Royal Society of Chemistry (2015)A microwave-assisted hydrothermal method was applied to synthesize BaZr1xHfxO3, (BZHO) solid solutions at a low temperature, 140 1C, and relatively short times, 160 min. The detailed features of the crystal structure, ... -
Insight into the Effects of Fe Addition on the Local Structure and Electronic Properties of SrTiO3
Da Silva, Luis F.; M’Peko, Jean Claude; Andres, Juan; Beltran, Armando; Gracia, Lourdes; Bernardi, Maria Inês B.; Mesquita, Alexandre; Antonelli, Eduardo; Moreira, Mario Lucio; Mastelaro, Valmor Roberto American Chemical Society (2014-01)This paper reports an experimental and theoretical investigation of the effects of adding Fe to the perovskite strontium titanate SrTiO3. The effects include changes in the short-order range structure as well as in the ... -
Long-range and short-range structures of cube-like shape SrTiO3 powders: microwave-assisted hydrothermal synthesis and photocatalytic activity
Da Silva, Luis F.; Avansi, Waldir; Andres, Juan; Ribeiro, Caue; Moreira, Mario Lucio; Longo, Elson; Mastelaro, Valmor Roberto Royal Society of Chemistry (2013)We report herein a detailed study on the influence of microwave-assisted hydrothermal (MAH) treatment time on both long and short range structures around Ti atoms of SrTiO3 powders. Few studies have been carried out on ... -
Novel SrTi1−xFexO3 nanocubes synthesized by microwave-assisted hydrothermal method
Da Silva, Luis F.; Avansi, Waldir; Moreira, Mario Lucio; Andres, Juan; Longo, Elson; Mastelaro, Valmor Roberto Royal Society of Chemistry (2012-03)We report herein for the first time a facile synthesis method to obtain SrTi1−xFexO3 nanocubes by means by a microwave-assisted hydrothermal (MAH) method at 140 °C. The effect of iron addition on the structural and ... -
On the reversed crystal growth of BaZrO3 decaoctahedron: shape evolution and mechanism
Moreira, Mario Lucio; Andres, Juan; Mastelaro, Valmor Roberto; Varela, José A.; Longo, Elson Royal Society of Chemistry (2011)BaZrO3 (BZO) nanoparticles were nucleated, grown and subsequently self-assembled into a 3D decaoctahedronal architecture via a microwave-assisted hydrothermal (MAH) method. X-Ray diffraction (XRD), field emission scanning ... -
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 ... -
Quantum mechanical modeling of excited electronic states and their relationship to cathodoluminescence of BaZrO3
Moreira, Mario Lucio; Andres, Juan; Gracia, Lourdes; Beltran, Armando; Montoro, Luciano A.; Varela, José A.; Longo, Elson American Institute of Physics (AIP Publishing LLC) (2013)First-principles calculations set the comprehension over performance of novel cathodoluminescence (CL) properties of BaZrO3 prepared through microwave-assisted hydrothermal. Ground (singlet, s*) and excited (singlet s** ... -
Quantum Mechanics Insight into the Microwave Nucleation of SrTiO3 Nanospheres
Moreira, Mario Lucio; Longo, V. M.; Avansi, Waldir; Ferrer, Mateus M.; Andres, Juan; Mastelaro, Valmor Roberto; Varela, José A.; Longo, Elson American Chemical Society (2012)An extensive investigation of strontium titanate, SrTiO3 (STO), nanospheres synthesized via a microwave-assisted hydrothermal (MAH) method has been conducted to gain a better insight into thermodynamic, kinetic, and reaction ... -
Radioluminescence properties of decaoctahedral BaZrO3
Moreira, Mario Lucio; Volanti, Diogo P.; Andres, Juan; Montes, Paulo J. R.; Valerio, Mario E. G.; Varela, José A.; Longo, Elson Elsevier (2011)Radioluminescence (RL) emissions were obtained for the BaZrO3 self-assembled nanocrystals under decaoctahedral shape, if produced via microwave-assisted hydrothermal method. Trapped F centers created within the band gap ... -
Relationship between Crystal Shape, Photoluminescence, and Local Structure in SrTiO3 Synthesized by Microwave-Assisted Hydrothermal Method
Da Silva, Luis F.; Avansi, Waldir; Moreira, Mario Lucio; Mesquita, Alexandre; Maia, Lauro; Andres, Juan; Longo, Elson; Mastelaro, Valmor Roberto Hindawi Publishing Corporation (2012)This paper describes the effect of using different titanium precursors on the synthesis and physical properties of SrTiO3 powders obtained by microwave-assisted hydrothermal method. X-ray diffraction measurements, X-ray ... -
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 ... -
Structural and optical properties of CaTiO3 perovskite-based materials obtained by microwave-assisted hydrothermal synthesis: An experimental and theoretical insight
Moreira, Mario Lucio; Paris, Elaine Cristina; Do Nascimento, G. S.; Longo, V. M.; Sambrano, Julio; Mastelaro, Valmor Roberto; Bernardi, Maria Inês B.; Andres, Juan; Varela, José A.; Longo, Elson Elsevier (2009)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 ... -
Unveiling the efficiency of microwave-assisted hydrothermal treatment for the preparation of SrTiO3 mesocrystals
Da Silva, Luis F.; Catto, Ariadne C.; Avansi, Waldir; Mesquita, Alexandre; Maia, Lauro; Lopes, Osmando; Li, Máximo Siu; Moreira, Mario Lucio; Longo, Elson; Andres, Juan; Mastelaro, Valmor Roberto Royal Society of Chemistry (2019-09-16)Material processing has become essential for the proper control, tuning and consequent application of the properties of micro/nanoparticles. In this case, we report herein the capability of the microwaveassisted hydrothermal ...