Search Results - "Coaquira, Jose A."

Significantly enhancement of sunlight photocatalytic performance of ZnO by doping with transition metal oxides by Ramírez, Alfonso E., Montero-Muñoz, Marly, López, Lizbeth L., Ramos-Ibarra, J. E., Coaquira, Jose A. H., Heinrichs, Benoît, Páez, Carlos A.

“…In this study we report, the synthesis of ZnO and its doping with Transition Metal Oxides -TMO-, such as Cr 2 O 3 , MnO 2 , FeO, CoO, NiO, Cu 2 O and CuO…”
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Field-driven spin reorientation in SmMnO3 polycrystalline powders by Mantilla, John, Morales, Marco, Venceslau, Wenderson, Corredor, Laura, Morais, P.C., Aragón, Fermin F.H., William da Silva, Sebastião, Coaquira, Jose A.

“…The SmMnO3 perovskite system shows interesting magnetic properties and making them an attractive material for specific technological application. However,…”
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Engineering Shape Anisotropy of Fe3O4‑γ-Fe2O3 Hollow Nanoparticles for Magnetic Hyperthermia by Niraula, Gopal, Coaquira, Jose A. H, Zoppellaro, Giorgio, Villar, Bianca M. G, Garcia, Flavio, Bakuzis, Andris F, Longo, João P. F, Rodrigues, Mosar C, Muraca, Diego, Ayesh, Ahmad I, Sinfrônio, Francisco Sávio M, de Menezes, Alan S, Goya, Gerardo F, Sharma, Surender K

“…The use of microwave-assisted synthesis (in water) of α-Fe2O3 nanomaterials followed by their transformation onto iron oxide Fe3O4-γ-Fe2O3 hollow nanoparticles…”
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Observation of magnetic vortex configuration in non-stoichiometric Fe3O4 nanospheres by Niraula, Gopal, Toneto, Denilson, Goya, Gerardo F, Zoppellaro, Giorgio, Coaquira, Jose A H, Muraca, Diego, Denardin, Juliano C, Almeida, Trevor P, Knobel, Marcelo, Ayesh, Ahmad I, Sharma, Surender K

“…Theoretical and micromagnetic simulation studies of magnetic nanospheres with vortex configurations suggest that such nanostructured materials have…”
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Tuning the shape, size, phase composition and stoichiometry of iron oxide nanoparticles: The role of phosphate anions by Niraula, Gopal, Coaquira, Jose A.H., Aragon, Fermin H., Galeano Villar, Bianca M., Mello, Alexandre, Garcia, Flavio, Muraca, Diego, Zoppellaro, Giorgio, Vargas, Jose M., Sharma, Surender K.

“…This work describes a microwave synthetic approach for the controlled assembly of α-Fe2O3 nanosystems with defined morphologies, such as hollow nanotubes…”
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A New Design for Magnetic Poly(vinyl pivalate) for Biomedical Applications: Synthesis, Characterization, and Evaluation of Cytotoxicity in Fibroblasts, Keratinocytes, and Human Melanoma Cells by Araujo, Robson T., Neta, Maria S. B., Coaquira, José A. H., Chaves, Sacha B., Machado, Fabricio

“…Polymers containing magnetic properties play an important role in biomedical therapies, such as embolotherapy or hyperthermia, for their differentiated…”
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Investigation of the magnetic properties of SrFe12O19 synthesized by the Pechini and combustion methods by Ramírez, Alfonso E., Solarte, Norleth J., Singh, L.H., Coaquira, José A.H., Gaona J., Sonia

“…•SrFe12O19 samples were obtained.•The method of preparation was investigated.•The magnetic response was studied.•Structural and magnetic differences are…”
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Effect of the thickness reduction on the structural, surface and magnetic properties of α-Fe2O3 thin films by Aragón, Fermin F.H., Ardisson, José D., Aquino, Juan C.R., Gonzalez, Ismael, Macedo, Waldemar A.A., Coaquira, José A.H., Mantilla, John, da Silva, Sebastião W., Morais, Paulo C.

“…Hematite (α-Fe2O3) polycrystalline thin films of different thicknesses were produced by thermal oxidation in air atmosphere from Fe metallic thin-films…”
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Surface Segregation in Chromium-Doped Nanocrystalline Tin Dioxide Pigments by Castro, Ricardo H. R., Rufner, Jorgen, Hidalgo, Pilar, Gouvêa, Douglas, Coaquira, José A. H., van Benthem, Klaus

“…Surface properties play an important role in understanding and controlling nanocrystalline materials. The accumulation of dopants on the surface, caused by…”
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Structural and Surface Study of Praseodymium-Doped SnO2 Nanoparticles Prepared by the Polymeric Precursor Method by Aragón, Fermin H, Gonzalez, Ismael, Coaquira, José. A. H, Hidalgo, Pilar, Brito, Hermi F, Ardisson, José. D, Macedo, Waldemar A. A, Morais, Paulo C

“…In the present study, we report on the successful synthesis of Pr-doped SnO2 (SnO2:Pr) nanoparticles using a polymeric precursor method while setting the…”
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Evidence of Cr3+ and Cr4+ Coexistence in Chromium-Doped SnO2 Nanoparticles: A Structural and Magnetic Study by Aquino, Juan C. R, Aragón, Fermin H, Coaquira, José A. H, Gratens, Xavier, Chitta, Valmir A, Gonzales, Ismael, Macedo, Waldemar A. A, Morais, Paulo C

“…The present study reports the successful synthesis of Sn1–x Cr x O2 nanoparticles with doping content (x) ranging from 0 to 0.20. Samples were synthesized by a…”
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Synthesis and characterization of the MNP@SiO2@TiO2 nanocomposite showing strong photocatalytic activity against methylene blue dye by Lacerda Fernandes, Ítalo, Pereira Barbosa, Danns, Botelho de Oliveira, Sérgio, Antônio da Silva, Valdeir, Henrique Sousa, Marcelo, Montero-Muñoz, Marly, A. H. Coaquira, José

“…[Display omitted] •A core–shell-shell MNP@SiO2@TiO2 nanophotocatalysts promising for wastewater treatment.•Magnetic MNP@SiO2@TiO2 nanocomposite synthesized via…”
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Synthesis, structural and magnetic study of BaFe12O19/CoFe2O4@CoFe2 nanocomposites by Silva, Lucas M., Morales, Marco A., Mariano, José F.M.L., Coaquira, José A.H., de Araújo, José H.

“…Cooperative effects in hybrid nanocomposites are an interesting field of research. The behavior of magnetic nanocomposites is the result of spatial…”
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Role of defects on the enhancement of the photocatalytic response of ZnO nanostructures by Montero-Muñoz, Marly, Ramos-Ibarra, J.E., Rodríguez-Páez, Jorge E., Teodoro, Marcio D., Marques, Gilmar E., Sanabria, Alfonso R., Cajas, Paola C., Páez, Carlos A., Heinrichs, Benoît, Coaquira, Jose A.H.

“…[Display omitted] •ZnO with different morphologies and concentration of surface defects were synthesized.•The O2-vacancies are energetically favorable for the…”
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Structural, morphological, and magnetic characterizations of (Fe0.25Mn0.75)2O3 nanocrystals: A comprehensive stoichiometric determination by Mantilla, John C., Nagamine, Luiz C.C.M., Cornejo, Daniel R., Cohen, Renato, de Oliveira, Wesley, Souza, Paulo E.N., Silva, Sebastião W. da, Aragón, Fermin F.H., Gastelois, Pedro L., Morais, Paulo C., Coaquira, José A.H.

“…This report aims to investigate in depth FeMnO3, a material of interest due to its fascinating magnetic and multiferroic properties and its many applications…”
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Effects of silica coating on the magnetic properties of magnetite nanoparticles by de Mendonça, Estelle Silva Diorato Teixeira, de Faria, Anna Carolina Britto, Dias, Sílvia Cláudia Loureiro, Aragón, Fermin F.H., Mantilla, John C., Coaquira, José A.H., Dias, José Alves

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Observation of magnetic vortex configuration in non-stoichiometric FeO nanospheres by Niraula, Gopal, Toneto, Denilson, Goya, Gerardo F, Zoppellaro, Giorgio, Coaquira, Jose A. H, Muraca, Diego, Denardin, Juliano C, Almeida, Trevor P, Knobel, Marcelo, Ayesh, Ahmad I, Sharma, Surender K

“…Theoretical and micromagnetic simulation studies of magnetic nanospheres with vortex configurations suggest that such nanostructured materials have…”
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Observation of magnetic vortex configuration in non-stoichiometric Fe 3 O 4 nanospheres by Niraula, Gopal, Toneto, Denilson, Goya, Gerardo F., Zoppellaro, Giorgio, Coaquira, Jose A. H., Muraca, Diego, Denardin, Juliano C., Almeida, Trevor P., Knobel, Marcelo, Ayesh, Ahmad I., Sharma, Surender K.

“…Theoretical and micromagnetic simulation studies of magnetic nanospheres with vortex configurations suggest that such nanostructured materials have…”
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Engineering Shape Anisotropy of Fe 3 O 4 -γ-Fe 2 O 3 Hollow Nanoparticles for Magnetic Hyperthermia by Niraula, Gopal, Coaquira, Jose A. H., Zoppellaro, Giorgio, Villar, Bianca M. G., Garcia, Flavio, Bakuzis, Andris F., Longo, João P. F., Rodrigues, Mosar C., Muraca, Diego, Ayesh, Ahmad I., Sinfrônio, Francisco Sávio M., de Menezes, Alan S., Goya, Gerardo F., Sharma, Surender K.

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Surface Segregation in SnO2-Fe2O3 Nanopowders and Effects in Mössbauer Spectroscopy by Castro, Ricardo H. R., Hidalgo, Pilar, Coaquira, José A. H., Bettini, Jefferson, Zanchet, Daniela, Gouvêa, Douglas

“…SnO2–Fe2O3 nanopowders prepared by the polymeric precursor method were studied by combined conventional and high‐resolution techniques. The powders treated at…”
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