Materials Literature
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The magnetic entropy change of polycrystalline samples Gd, La(Fe0.92Co0.08)11.83Al1.17, LaFe10.8Si2.2, Mn5Ge2.7Ga0.3, Nd2AlFe13Mn3, and TbCo2 with a second-order phase transition has been investigated. A uniform phenomenological function that describes the magnetic entropy change is found for these materials. This cou…
A bacterial mediated synthesis of copper/copper oxide nanoparticle composite is reported. A Gram-negative bacterium belonging to the genus Serratia was isolated from the midgut of Stibara sp., an insect of the Cerambycidae family of beetles found in the Northwestern Ghats of India. This is a unique bacterium that is q…
The inhibitive action of 1-cinnamylidine-3-thiocarbohydrazide (CTCH) and 1,1ʹ-dicinnamylidine-3-thiocarbohydrazide (DCTCH) against the corrosion of carbon steel in 15% hydrochloric acid (HCl) was investigated using nonelectrochemical and electrochemical techniques. Potentiodynamic polarization studies revealed that th…
This paper presents our experiments and analysis of the electrical tree growing characteristics. The relationship between electrical tree propagation and the material morphology in XLPE cable insulation has been studied by researching the structure and growth characteristics of a double structure electrical tree. It h…
The benefits of stress: Prestressed multi-walled carbon nanotubes (PMWNTs; see picture) have smaller interwall spacings than normal multi-walled nanotubes (MWNTs) and significantly enhanced mechanical properties. Molecular simulations show that a 20% reduction in interwall spacing increases the interwall shear strengt…
We present a pump-probe optical technique for measuring the thermal conductivity of liquids. The technique uses a reflective geometry which does not depend on the optical properties of the liquid and requires as little as a single droplet to produce a result. An analytical solution is given for bidirectional heat flow…
Mineralogical nomenclature in solid-solution series follows a system that has been called the 50% rule, more correctly the 100%/n rule or the dominant-constituent rule, in which the constituents are atoms (cations or anions), molecular groups, or vacancies. Recently developed systems of nomenclature for the arrojadite…
Abstract The electrospinning technology opens up enormous possibilities for the implementation of bio‐based materials and food hydrocolloids in numerous applications. In this context, chitosan is a sustainable, biocompatible, biodegradable, antimicrobial and non‐toxic polysaccharide of great relevance in many fields o…
The results of space charge evolution in cross-linked polyethylene power cables under dc electrical field at a uniform temperature and during external voltage polarity reversal are presented in the paper. A mirror image charge distribution was observed in the steady state, but the pre-existing field altered the way in…
Microstructural features and mechanical properties of an Al–Mg–Si alloy processed by high-pressure torsion (HPT) have been investigated using transmission electron microscopy, X-ray diffraction, three-dimensional atom probe, tensile tests and micro-hardness measurements. It is shown that HPT processing of the Al–Mg–Si…
"PEGylation" has become the most widely used method for imparting stealth properties to drug nanocarriers. PEGylation of nanoparticles provides a steric barrier to the adsorption of opsonin proteins due to the neutrality, hydrophilicity, flexibility, and capacity for hydration of the PEG moiety. PEGylation of particle…
"Smart" materialsmaterials that respond to a stimulus or their environment to produce a dynamic and reversible change in critical propertieshave enabled progress in many areas, including display technologies, drug delivery, and self-healing materials for coating applications, among others. Many of the current examples…
The crystallization behavior of ultrathin phase change films was studied using time-resolved x-ray diffraction (XRD). Thin films of variable thickness between 1 and 50nm of the phase change materials Ge2Sb2Te5 (GST), N-doped GST, Ge15Sb85, Sb2Te, and Ag- and In-doped Sb2Te were heated in a He atmosphere, and the inten…
Significant advances have recently been made in the development of shape-memory polymers (SMP) that are able to undergo solution-induced shape changes. The main challenge in the development of such polymer systems is the conversion of solution-induced effects at the molecular level to macroscopic movement of working p…
The use of luminescent colloidal quantum dots in biological investigations has increased dramatically over the past several years due to their unique size-dependent optical properties and recent advances in biofunctionalization. In this review, we describe the methods for generating high-quality nanocrystals and repor…
By first-principles calculations, we present a doping-dependent phase diagram of the LaO M As ( M =V–Cu) family. It is characterized as a antiferromagnetic semiconductor around the LaOMnAs side and as a ferromagnetic metal around LaOCoAs. Both LaOFeAs and LaONiAs, where superconductivity were discovered, are located a…
Structural and electronic properties for oxygen-adsorbed graphene sheets have been explored using first-principles total-energy calculations within the local density functional theory. A finite energy gap emerges for the oxygen-adsorbed graphene and its value increases with the ratio of O∕C, as manifested by experimen…
A comprehensive numerical model for chalcogenide glasses is presented, coupling a physically based electrical model able to reproduce the threshold switching with a local nucleation and growth algorithm to account for the phase transition dynamics. The main ingredients of the chalcogenide physics are reviewed and anal…
The generic case of a ferroelectric solid solution is considered wherein different symmetry phases located at opposing ends of the diffusionless phase diagram are separated by a morphotropic boundary (MB). It is shown that the Landau theory of weak first-order phase transformations automatically predicts vanishing of…
We have investigated the electronic structure of graphite oxide using X-ray absorption spectroscopy at the carbon and oxygen K -edges. The unoccupied π * and σ * states associated with sp 2 hybridization in graphite, are also apparent in the graphite oxide, which indicates that it has a graphitic structure even though…