Materials Literature
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The aim of this work was to analyse the effect of pectin and glycerol concentration on colour, mechanical properties and water vapour permeability of pectin edible films. Pectin films were obtained from apple pectin film-forming solutions at concentrations of 1.5, 2.5 and 3.5%. Glycerol was added as a plasticizer at 3…
Noble metal (Ru, Pd, and Pt) catalyzed preparation of Ni2P/α-Al2O3 was proved by XRD characterization. As is known from H2-TPR experiments, Pd exhibits superior catalytic activity over Ru and Pt. These noble metal catalysts can be uniformly deposited on nickel phosphate precursors, and generate spillover hydrogen. Suc…
Herein, we present the formation of cadmium selenide (CdSe) islands embedded in a porous structure of entangled selenium (Se) nanofibers in the host matrix of a room temperature ionic liquid (RTIL). Electron beam irradiation has been employed to initiate the formation of the nanostructure while RTIL simultaneously pla…
The synthesis, structural and magnetic characterisation of a family of homo- and heterometallic complexes constructed with the Schiff base ligands 2-iminomethyl-6-methoxy-phenol (L1H) and 2-imino-6-methoxy-phenol (L2H), are discussed. Members include the heterometallic tetranuclear complexes of general formula [Na2M2(…
Nanoparticles of Co CrxFe2-xO4 with stoichio metric proportion x =0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0 were prepared by the Citrate-gel auto co mbustion method. The samp les were sintered at 500℃ for 4h in air. Structural characterizat ion of sintered samples was carried out by X-ray diffraction and Fourier Transform…
Using large scale numerical simulations, we examine the ordering of colloidal particles on square periodic two-dimensional muffin-tin substrates consisting of a flat surface with localized pinning sites. We show that when there are four particles per pinning site, the particles adopt a hexagonal ordering, while for fi…
Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesibles los libros digita…
A one-atom controlled platinum sub-nanocluster (under 1 nm) was synthesized using a phenylazomethine dendrimer template. This sub-nanocluster (SNC) catalyst exhibits a remarkable catalytic activity during reductive amination compared to the standard platinum nanoparticles of 2.2 ± 0.8 nm under mild conditions and a lo…
The postulated glass-liquid transition of low density amorphous ice (LDA) is investigated with deuteron NMR stimulated echo experiments. Such experiments give access to ultra-slow reorientations of water molecules on time scales expected for structural relaxation of glass formers close to the glass-liquid transition t…
In this work, a facile method for the preparation of a series of transition metal oxide–metal nanocomposites (MO–M) (such as NiO–Ni, Co3O4–Co, Fe3O4–Fe and MnO2–Mn) anchored on conductive nanowire arrays (such as TiC–C core–shell nanowires grown on a Ti alloy sheet) is reported for the first time. The obtained composi…
In this paper, we report on the preparation of decyl-modified silicon nanoparticles (decyl-SiNPs) and their encapsulation into silica nanoparticles (NPs). The decyl-SiNPs were obtained by the photoinduced hydrosilylation of hydride-terminated SiNPs (H-SiNPs), liberated from porous silicon (pSi), followed by encapsulat…
Estimating the apparent contact angle under equilibrium conditions is critical for the understanding of several engineering processes. Some examples are dropwise condensation, digital microfluidics, and material deposition schemes. Often, there is considerable uncertainty in the experimental estimation of the contact…
The structural, electronic and optical properties of rocksalt CdO have been studied using the plane-wave-based pseudo-potential density functional theory within generalized gradient approximation. The calculated lattice parameters are in agreement with previous experimental work. The band structure, density of states,…
We developed a new calculation strategy for determining the vibrational contribution of each layer or atom forming a slab, where the latter is a two-dimensional periodic structure of given thickness, generated by separating the bulk structure along the hkl plane of interest and used to simulate the crystal surfaces. B…
Influence of the materials and cell configuration, especially anode thickness, on the performance stability was examined during long-term operation of solid oxide fuel cells (SOFCs) with humidified methane (S/C = 0.1) at 1000°C. Two kinds of anode materials were evaluated; i.e., Ni–yttria–stabilized zirconia (Ni–YSZ)…
Based on the idea that modification of light quality could realize the modulation of morphogenesis and growth rate of plants, we fabricate a near ultraviolet (NUV)-green to red spectral converting BaY2S4:Eu2+, Er3+ phosphor by a solid state reaction route. We herein investigated the crystal structure and photoluminesc…
Neste trabalho, obteve-se quitosana a partir do exoesqueleto de Ucides cordatus cordatus, comumente denominado caranguejo-uçá, em um processo no qual a conversão da quitina em quitosana foi feita via reação convencional (QV) e também usando radiação de microondas (QP). Caracterizaram-se as quitosanas produzidas em fun…
While Raman spectroscopy is a useful method for analyzing many organic compounds, it is limited by relatively low sensitivity. Therefore, Surface Enhanced Raman Spectroscopy (SERS) based on the adsorption of organic analytes onto gold or silver nanostructures has been used to enhance the signal of chemicals presented…
Atomic structural models of zigzag-shaped carbon nanotubes (Z-CNTs) were constructed by periodically introducing pentagons and heptagons into pristine CNTs. In terms of formation energies, the Z-CNTs present comparable energetic stabilities to those of the pristine CNTs and are more stable than C60 fullerene. The mech…
Barium zirconate (BaZrO3) was synthesized successfully by the sonochemical method. The monophase of BaZrO3 was formed completely in short irradiation time without the calcination process. X-ray diffraction, Fourier transform and Raman spectroscopy were used to characterize formation of the perovskite BaZrO3 phase, whi…