Browsing División de Nanociencias y Materiales by Subject "QUÍMICA"
Now showing items 1-20 of 98
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A simple method for fabrication of antifuse WORM memories
(Elsevier, 2018)"A write-only-read-many (WORM) memory device was obtained by irradiating, with a commercial ultraviolet-ozone (UVO) lamp, the aluminium bottom electrode in an Al/AlOx-UVO/Al configuration. The formation of conductive paths ... -
Ag-coated heterostructures of ZnO-TiO2/delaminated montmorillonite as solar photocatalysts
(MDPI, 2017-08)"Heterostructures based on ZnO-TiO2/delaminated montmorillonite coated with Ag have been prepared by sol–gel and photoreduction procedures, varying the Ag and ZnO contents. They have been thoroughly characterized by XRD, ... -
Aleación de Disprosio-Níquel en forma de cinta y método de síntesis
(2008-07)"La presente invención describe y reclama una nueva aleación del compuesto intermetálico DyNi2 en forma de cinta. Asimismo, se describe una cinta útil para la refrigeración magnetocalórica a bajas temperaturas formada por ... -
Analytical magnetostatic model for 2D arrays of interacting magnetic nanowires and nanotubes
(Royal Society of Chemistry, 2020)"A fully analytical model to describe the magnetostatic properties of these 2D nanocylinder arrays (tubes and wires) is presented. The model allows calculating the components of the effective demagnetizing field as a ... -
Análisis de transferencia de carga electrónica en el sistema Au15 –(SPh)m, m=1, …, 6.
(2015-06)"En la década de los 90's se realizaron nuevos y diversos estudios en agregados metálicos de Au y Ag con un número pequeño de átomos con estructuras de capas llenas de n electrones (donde 2=2, 4, 6, 8, 18, 34, 54, 92…), ... -
Anharmonic contribution to the stabilization of Mg(OH)2 from first principles
(2018)"Geometrical and vibrational characterization of magnesium hydroxide was performed using density functional theory. Four possible crystal symmetries were explored: P[3 with combining macron] (No. 147, point group −3), C2/m ... -
As(V) removal capacity of FeCu bimetallic nanoparticles in aqueous solutions: the influence of Cu content and morphologic changes in bimetallic nanoparticles
(Elsevier, 2018)"In this study, bimetallic nanoparticles (BMNPs) with different mass ratios of Cu and Fe were evaluated. The influence of the morphology on the removal of pollutants was explored through theoretical and experimental studies, ... -
Carbon sponge-type nanostructures based on coaxial nitrogen-doped multiwalled carbon nanotubes grown by CVD using benzylamine as precursor
(2017)"Carbon sponges-type nanostructures (CSTN) based on coaxial nitrogen-doped multiwalled carbon nanotubes (CA-MWCNTs) were synthesized using the aerosol assisted chemical vapor deposition method involving the decomposition ... -
Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts
(Elsevier, 2021)"We present this study on FAU-type zeolites were prepared varying the Si/Al ratio (4, 5 and 6) and crystallization time (4, 6 and 8?h) to produce a highly pure and homogeneous material with enhanced surface area values. ... -
Cement pastes and mortars containing nitrogen-doped and oxygen-functionalized multiwalled carbon nanotubes
(Hindawi, 2016)"Cement pastes and mortars based on ordinary Portland cement containing nitrogen-doped multiwalled carbon nanotubes (MWCNT-Nx) or oxygen-functionalized multiwalled carbon nanotubes (MWCNT-Ox) are investigated. To incorporate ... -
Comparison of two synthesis methods on the preparation of Fe, N-Co-doped TiO2 materials for degradation of pharmaceutical compounds under visible light
(Elsevier, 2017)"In this work, we report the synthesis, characterization and photocatalytic evaluation of visible light active iron-nitrogen co-doped titanium dioxide (Fe3+-TiO2?xNx) nanostructured catalyst. Fe3+-TiO2?xNx was synthesized ... -
Compressibility, microcalorimetry, elastic properties and EELS of rhenium borides
(Elsevier, 2018)"Based on synchrotron X-ray diffraction on phase-pure samples, we revised the bulk moduli of the rhenium borides Re7B3 (B-0 (Re7B3) = 391(5) GPa) and orthorhombic Re3B (B-0 (orthorhombic Re3B) = 393(4) GPa) and determined ... -
Concreto reforzado con nanotubos de carbono dopados con oxígeno y dopados con nitrógeno
(2015-05)"En éste trabajo se describen los efectos de la incorporación de nanotubos de carbono multipared en mezclas de morteros hidráulicos basados en cemento gris tipo Portland. Los nanotubos de carbono fabricados presentan ... -
Control of the asymmetric growth of nanowire arrays with gradient profiles
(Royal Society of Chemistry, 2021)"A novel electrochemical methodology for the growth of arrays of Ni and Co nanowires (NWs) with linear and non-linear varying micro-height gradient profiles (?HGPs), has been developed. The growth mechanism of these ... -
Correlation between crystallographic and microstructural features and low hysteresis behavior in Ni50.0Mn35.25In14.75 melt-spun ribbons
(Elsevier, 2018)"In this work, crystallographic, microstructural and magnetocaloric investigations were performed on textured Ni50Mn35.25In14.75 melt-spun ribbons with low thermal (6?K) and magnetic-field induced hysteresis (?0.73?J?kg?1 ... -
División de Materiales Avanzados-IPICyT*
(UNAM, 2016)"En este trabajo se describen las actividades en nanociencias y nanotecnologías (NyN) que se llevan a cabo en la División de Materiales Avanzados del Instituto Potosino de Investigación Científica y Tecnológica A.C. (IPICyT). ... -
Effect of ball to powder ratio on the mechanosynthesis of Re2C and its compressibility
(Elsevier, 2019)"The mechanosynthesis of hexagonal rhenium carbide (Re2C) from the elements is explored as a function of the balls to powder ratio (BPR). Burgios's equation has been used to calculate the accumulated energy (Delta E-accum) ... -
Effect of Mg as impurity on the structure of mesoporous γ-Al203: efficiency as catalytic support in HDS of DBT
(Walter de Gruyter GmbH, 2018)"This work shows the study of two alumina materials synthesized from aluminum sulfate with different purity by hydrolysis-precipitation route. The main difference between the aluminum salt precursors was the lower cost of ... -
Effect of silicon dots into coconut fibers on the nucleating capacity of β-crystals of polypropylene
(Universidad Autónoma Metropolitana, 2021)"Three concentrations of sodium hydroxide (3, 5, and 7% based on a composition by weight) and 2 reaction times (1 and 4 h) were used to treat coconut fiber. According to the results, the inclusion of treated fiber in polymer ... -
Effect of solidification rate on martensitic transformation behavior and adiabatic magnetocaloric effect of Ni50Mn35In15 ribbons
(Elsevier, 2018)"Ni50Mn35In15 compound has become an archetype for investigating the functional properties of metamagnetic shape memory alloys. We have fabricated Ni50Mn35In15 melt spun ribbons to study the crystal structure, microstructure, ...