Materials Literature
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We use a hybrid Monte Carlo algorithm to simulate the shaking of spheres at different vibrational amplitudes and find that spontaneous crystallization occurs in specific dynamical regimes. Several crystallizing transitions are typically observed, leading to end states which can be fully or partially ordered, depending…
The ferropnictidesuperconductors exhibit a sensitive interplay between the lattice and magnetic degrees of freedom, including a number of phonon modes that are much softer than predicted by nonmagnetic calculations using density functional theory (DFT). However, it is not known what effect, if any, the long-range magn…
Conjugated polymer nanofibers with lengths of tens of micrometers and diameters of hundreds of nanometers are prepared via the assembly of polypyrrole (PPy) nanoparticles in water using a freeze‐drying method. The structure and uniformity of the PPy nanofibers are critically affected by the processing conditions, such…
The geometric and spin-resolved electronic structure of a h-BN adsorbed Ni(111) surface has been investigated by density functional theory calculations. Two energy minima (physisorption and chemisorption) are obtained when the dispersive van der Waals correction is included. The geometry of N atom on top site and B at…
Magnesium (Mg) or lithium (Li) was doped into pre-vanadium (V)-doped β-rhombohedral boron (β-B), targeting the codoping of V and Mg or Li into β-B, which is composed of B12 icosahedral clusters. The structure and electrical property of V-and-Mg- or V-and-Li-codoped β-B were revealed by X-ray powder diffraction analysi…
Received 20 February 2014DOI:https://doi.org/10.1103/PhysRevB.89.079905©2014 American Physical Society
In this work, the thermomechanical pulp of Pinus massoniana was pretreated with a NaOH/thiourea/urea aqueous solution to promote fiber bonded area and to increase paper strength. The effects of pulp concentration, alkali dosage, dipping time, and freezing time were evaluated through single factor experiments. The opti…
The next generation of fusion power plants (DEMO) should rely on a breeding blanket (BB) able to efficiently convert the neutrons kinetic energy into heat, to ensure the tritium self-sufficiency and to adequately shield the toroidal field coils from neutrons and gamma rays. The eutectic lithium-lead alloy is a consoli…
A high hydrostatic pressure method, which can apply over 600 MPa pressure was employed for preparing a hydrogel of poly(vinyl alcohol) (PVA) loaded with heparin. The aim of this study was to fabricate a heparin-PVA hydrogel conduit and evaluate its potential for vascular access. Heparin-PVA complex hydrogel showed sup…
In this article, a new method that combines finite element method with data mining techniques is proposed to obtain the mechanical properties of electrolytic tinplate. Using information provided by two simple and economic tests (hardness and spring-back), already used in industries to classify tinplate, yield stress a…
Addition of organoclay to polymer matrix has recently attracted industry attention due to improved physical properties with an overwhelming potential in crude oil and water pipe applications. In this work, electrical grade-corrosion resistant (E-CR) glass fiber mats were used to prepare glass fiber reinforced epoxy (G…
The hemp fibres present specific fibre morphology and a complex non homogeneous cross section which changes in function of the location along the fibre length. Thus the mechanical properties of hemp fibres request a specific characterization method. In this study, firstly, a digital treatment method was developed allo…
In this paper the production of poly (3-hydroxybutyrate/3-hydroxyvalerate) (PHBV) with activated sludge was investigated by using the fermentation liquid from primary sludge (PS) and waste activated sludge (WAS) as carbon source. First, the suitable concentration and ratio of acetic to propionic (acetic/propionic) for…
Surface enhanced Raman spectroscopy (SERS) is frequently associated with "chemical enhancement" (CE), which is an effect of the chemical coupling between reporting molecules and surfaces. While SERS technique is mainly attributed to the studies of metallic surfaces, chemical coupling must be present on semiconductor s…
Bulk and nanoconfined liquids have very different physics; for instance, nanoconfined liquids show stratification and position-dependent relaxation processes. A number of similarities between bulk and nanoconfined liquids have nevertheless been reported in computer simulations during the last decade. Inspired by these…
The origin of passivity, as viewed from the Point Defect Model, is presented in terms of the phase space analysis of the rate law for the growth of passive films. It is shown that passivity is due to the formation of a metastable oxide and hence, the occurrence of passivity is a kinetic phenomenon, in which the rate o…
The growth of (0002) orientated polycrystalline undoped and Ga-doped ZnO films by DC sputtering under Ar is described. The (0002) peak intensity decreases with increasing substrate temperature in both doped and undoped samples. The average grain sizes are very small. This indicates that ZnO films with low crystallinit…
Zenus® is a colloidal ceria abrasive for CMP applications with monodispersed, well-crystallized particles of ceria with isotropic faceted morphology. These features of Zenus® HC60 were characterized by SEM/TEM observation, XRD analysis, particle size distribution measurement by laser diffraction particle size analyzer…
ABSTRACT This work has obtained polyaniline/manganese dioxide (PANI/MnO 2 ) nanofibers microsphere by interfacial chemical synthesis with 4‐amino‐thiophenol (4‐ATP) as the structure‐directing agent on the Au substrate. The cyclic voltammograms, galvanostatic charge–discharge, and electrochemical impedance spectroscopy…
Thermal conduction capability of metal hydrides can be enhanced by 400 ~ 500% through pelletizing the metal hydride powder after a well-controlled copper-coating treatment. In this paper, pelletized LaNi5 metal hydride is studied to evaluate its heat transfer performance and hydrogen absorption rate. In order to analy…