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Mostrando publicaciones 1-10 de 10
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AgSn[Bi1−xSbx]Se3: synthesis, structural characterization, and electrical behavior
Valencia-Gálvez, P.; Delgado, Daniela; López, María Luisa; Álvarez-Serrano, Inmaculada; Moris-López, Silvana; Galdámez, Antonio (2021)Herein, we report the synthesis, characterization, and electrical properties of lead-free AgSnm[Bi1−xSbx]Se2+m (m = 1, 2) selenides. Powder X-ray diffraction patterns and Rietveld refinement data revealed that these selenides ...
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(Cu)tet(Cr2–xSnx)octS4–ySey Spinels: Crystal structure, density functional theory calculations, and magnetic behavior
Moris-López, Silvana; Valencia-Gálvez, P.; Mejía-López, José; Peña, Octavio; Barahona-Huenchumil, Patricia; Galdámez, Antonio (2019)A new series of (Cu)tet[Cr2–xSnx]octS4–ySey compounds was prepared by solid-state reaction at high temperature. Determination of the crystal structures by single-crystal X-ray diffraction revealed that CuCr1.0Sn1.0S2.1Se1.9, ...
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Cu2Zn(Sn1−xSix)Se4: Structural characterization, vibrational and physical properties of cztse-derivatives
Valencia-Gálvez, P.; Barahona-Huenchumil, Patricia; Galdámez, Antonio; Moris-López, Silvana (2023)Herein, we report the structural characterization and vibrational and physical properties of Cu2ZnSn1−xSixSe4 solid solutions synthesized using the ceramic method. X-ray diffraction analysis and Rietveld analysis of the ...
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Cuestionario de reserva cognitiva: análisis psicométrico desde la teoría de respuesta al ítem
Martino, Pablo; Caycho, Tomás; Valencia-Gálvez, P.; Politis, D.; Gallegos, Miguel; De Bortoli, M.Á.; Cervigni, Mauricio (2022)Introducción: La reserva cognitiva es la capacidad para tolerar mejor el daño cerebral mediante recursos cognitivos preexistentes y compensatorios. Un método de evaluación es el cuestionario de reserva cognitiva (CRC) de ...
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Electrical and optical properties of p-type Ag0.3Cu0.7InQ2 chalcopyrite semiconductors
Moris-López, Silvana; Manríquez, Victor; Barahona-Huenchumil, Patricia; Galdámez, Antonio; Valencia-Gálvez, P. (2018)We report the synthesis, characterization and electrical properties of Ag0.3Cu0.7InS2, Ag0.3Cu0.7InSe2 and Ag0.3Cu0.7InTe2. These solid solutions were synthesized via microwave-assisted solid-state reactions. Powder X-ray ...
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Raman characterization of CuCr2-xSnx S4 spinels
Valencia-Gálvez, P.; Peña, Octavio; Moris-López, Silvana; Barahona-Huenchumil, Patricia (2019)Polycrystalline thiospinels CuCr2-xSnxS4 (x = 0.4, 0.8, 1.0 and 1.4) were synthesized via conventional solid-state reaction. The samples were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray analysis ...
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Raman characterization of CuIrSnX4 normal-spinel systems
Barahona-Huenchumil, Patricia; Galdámez, Antonio; Valencia-Gálvez, P.; Moris-López, Silvana (2020)CuIrSnS4, CuIrSnSe4 and CuIrSnS2Se2 were synthetized by a solid-state reaction at 700 °C. Powder X-ray diffraction patterns were consistent with normal spinel-type structure. Scanning electron microscopy (SEM-EDS) images ...
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Structural characterization and thermoelectric properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
Delgado, Daniela; Moris-López, Silvana; Valencia-Gálvez, P.; López, María Luisa; Álvarez-Serrano, Inmaculada; Blake, Graeme R.; Galdámez, Antonio (2023)Herein, we report the synthesis, structural and microstructural characterization, and thermoelectric properties of AgSnm[Sb0.8Bi0.2]Te2+m and Br-doped telluride systems. These compounds were prepared by solid-state reaction ...
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Synthesis, x-ray diffraction, and raman spectroscopy of AgSnBiSe3 and AgSnBiSe2S systems
Moris-López, Silvana; Barahona-Huenchumil, Patricia; Valencia-Gálvez, P.; Galdámez, Antonio (2019)AgSnBiSe3 and AgSnBiSe2S were prepared by solid state reactions at 950 °C. The phases were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The samples were ...
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Synthesis, x-ray difraction, and raman spectroscopy of AgSnBiSe3 AND AgSnBiSe2S systems
Moris-López, Silvana; Barahona-Huenchumil, Patricia; Valencia-Gálvez, P.; Galdámez, Antonio (2019)