División de Nanociencias y Materiales: Envíos recientes
Mostrando ítems 221-240 de 588
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New direction in nanotube science
(Elsevier, 2004)"We review the latest advances in the production and state-of-the art characterization of B- and N-doped carbon nanotubes (CNTs) and nanofibers. We briefly discuss different approaches to producing these novel doped ... -
Shape memory behavior of Ni-Fe-Ga and Ni-Mn-Sn ribbons
(EDP Sciences, 2015)"Magnetic Shape Memory Alloys exhibit multifunctional properties due the martensitic transformation (MT) and accompanying changes in the magnetic subsystem. In this work, melt spun ribbons of nominal composition Ni55Fe16Ga29 ... -
Optimizing the curie temperature of pseudo-binary RxR'2-xFe17 (R,R' = rare earth) for magnetic refrigeration
(IOP Publishing, 2014)"Several pseudo-binary RxR2-x'Fe-17 alloys (with R = Y, Ce, Pr, Gd and Dy) were synthesized with rhombohedral Th2Zn17-type crystal structure determined from x-ray and neutron powder diffraction. The choice of compositions ... -
Structures and electronic properties of TinV (n = 1–16) clusters: first-principles calculations
(American Chemical Society, 2016)"Structures and electronic properties of TinV (n = 1–16) clusters have been investigated using density functional theory with the generalized gradient approximatio. The calculations have shown that the TinV clusters favor ... -
Termination of hollow core nanopipes in GaN by an AlN interlayer
(Elsevier, 2016)"Nanopipes associated to screw dislocations are studied by transmission electron microscopy in Si-doped GaN films grown on silicon substrates. The observations revealed that dislocations had an empty core and that an AlN ... -
On the correct estimation of the magnetic entropy change across the magneto-structural transition from the Maxwell relation: study of MnCoGeBx alloy ribbons
(Elsevier, 2017)"An accurate calculation of the different magnetocaloric-related magnitudes derived from the temperature dependence of the magnetic entropy change in materials exhibiting first-order magnetocaloric effect is imperative to ... -
Tuning emission in violet, blue, green and red in cubic GaN/InGaN/GaN quantum wells
(Elsevier, 2016)"Light emission in the three primary colors was achieved in cubic GaN/InGaN/GaN heterostructures grown by molecular beam epitaxy on MgO substrates in a single growth process. A heterostructure with four quantum wells with ... -
Giant reversible inverse magnetocaloric effects in Ni50Mn35In15 Heusler alloys
(Elsevier, 2016)"The magnetic properties and reversibility of the magnetocaloric effect of Ni50Mn35In15 have been studied in the vicinity of the phase transition using magnetization and direct adiabatic temperature change (?Tad) measurements ... -
Phase transition and magnetocaloric properties of Mn50Ni42−xCoxSn8 (0 ≤ x ≤ 10) melt-spun ribbons
(International Union of Crystallography, 2018)"The characteristics of magnetostructural coupling play a crucial role in the magnetic field-driven behaviour of magnetofunctional alloys. The availability of magnetostructural coupling over a broad temperature range is ... -
BiFeO3 codoping with Ba, La and Ti: Magnetic and structural studies
(World Scientific , 2015)"Conventional solid state reaction method, from oxides and carbonates, was employed to prepare bismuth (Bi)-based multiferroic systems. The undoped BiFeO3 (BFO) and the codoped system with Ba, La and Ti (Bi1?xBaxFe1?yTiyO3, ... -
Ablation and optical third-order nonlinearities in Ag nanoparticles
(Dove Press Ltd, 2010)"The optical damage associated with high intensity laser excitation of silver nanoparticles (NPs) was studied. In order to investigate the mechanisms of optical nonlinearity of a nanocomposite and their relation with its ... -
Simple method to synthesize functionalized carbon nanotubes employing cobalt nitrate and acetone by using spray pyrolysis deposition technique
(Hindawi Publishing Corporation, 2012)"Recently alcohols and ketones have been employed to sensitize CNT by CVD. A study has shown the importance of the chemical nature of those carbon precursors on the characteristics of the CNT (carbon nanotubes) obtained. ... -
Transformation temperatures and electrochemical behavior of polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys
(ESG, 2018)"The effect of Fe addition on martensitic transformation temperatures and electrochemical behavior was studied in polycrystalline Ni51.4Mn24.8-XGa23.8FeX alloys (1<x<2.2) and Co38.3Ni32.1Ga29.6 as alternative to Ni-Mn-Ga ... -
High-pressure synthesis of β-Ir4B5 and determination of the compressibility of various iridium borides
(American Chemical Society, 2018)"A new iridium boride, beta-Ir4B5, was synthesized under high-pressure/high-temperature conditions of 10.5 GPa and 1500 degrees C in a multianvil press with a Walker-type module. The new modification beta-Ir4B5 crystallizes ... -
Experimental data in support of characterization of the CePO4 dispersion into transparent PMMA/PU IPNs by the sequential route
(Elsevier, 2018)"This article is focused on the complementary data referring to the article "Dispersion of upconverting nanostructures of CePO4 using rod and semi-spherical morphologies into transparent PMMA/PU IPNs by the sequential ... -
Investigating the magnetic entropy change in single-phase Y2Fe17 melt-spun ribbons
(Elsevier, 2016)"The inspection of simplified fabrication and/or processing routes in order to produce materials with attractive magnetocaloric properties is of paramount importance for the development of environmentally friendly magnetic ... -
Electrum, the gold–silver alloy, from the bulk scale to the nanoscale: synthesis, properties, and segregation rules
(American Chemical Society, 2016)"The alloy Au–Ag system is an important noble bimetallic phase, both historically (as “Electrum”) and now especially in nanotechnology, as it is applied in catalysis and nanomedicine. To comprehend the structural characteristics ... -
Síntesis de nanotubos de carbono nitrogenados producidos mediante nuevos catalizadores
(2019-07-10)"Los nanotubos de carbono exhiben excelentes propiedades mecánicas y electrónicas, esto es debido a su estructura y su tamaño, gracias a estas propiedades pueden tener diversas aplicaciones como: catalizadores, adsorbentes ... -
"Métodos supersimétricos en la física de medios materiales"
(11/07/2019)"En los capítulos 2 y 3 se propone una generalización al método uniparamétrico (γ-deformado) de factorización estrictamente isoespectral a un caso biparamétrico incluyendo un desplazamiento ε en los operadores de factorización ... -
Nanotubos de carbono dopados con nitrógeno y boro
(2019-06)“Nanotubos de carbono dopados con nitrógeno y boro” En este trabajo se presenta la síntesis y estudio de nanotubos de carbono de múltiples capas fueron dopados simultáneamente con nitrógeno y boro. (N-MWCNTs, N-B-MWCNTs, ...