Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
At normal pressure selenium exists in several forms of condensed state: crystalline (hexagonal Se n , α-, β-, γ-monoclinic Se 8 , monoclinic Se 8 ), rhombohedral Se 6 , α- and β-cubic Se, amorphous Se (red, brown and black Se), 4 liquid modifications, vitreous selenium. Structural and phase transformations taking plac…
Type I collagen is a suitable and versatile template for the structuration of silica at different length scales.
The photochromism and rewritability of Ag-TiO2 films were deactivated by modification with thiols to make it possible to retain color images displayed on the films (for more than 3 days under white fluorescent lamps), while the deactivated properties were fully reactivated by UV-irradiation.
The chemical diffusion and surface exchange coefficients were measured for and at and atm by electrical conductivity relaxation. Values of the chemical diffusion and surface exchange coefficients were obtained by monitoring the variation of electrical conductivity after an abrupt change in oxygen partial pressure. The…
The replacement of arteries with synthetic vascular prostheses often leads to failure when small-diameter or low-flow locations are concerned, due in part to the thrombogenicity of the graft surface. In order to improve long-term patency of these grafts, the concept of endothelial cell seeding has been suggested, the…
Star-microgels were prepared in a two-step process known as the arm first approach by Atom Transfer Radical Polymerization (ATRP). Living linear poly(methyl methacrylate) (PMMA), with molecular weight (Mn) of 10000 and 20000, was reacted with ethylene glycol dimethacrylate (EGDMA) as crosslinker and varying amounts of…
A surfactant-free route was successfully established to synthesize CeO2 single-crystalline nanowires using H2O2 as oxidizer and template agent.
This work describes the preparation of new materials based on immobilizing carbon nanofibres (CNFs) on the surface of Ni foam. CNFs were catalytically synthesized by decomposition of ethene over the Ni foam. The influence of formation conditions on the morphology of the CNFs, on the mechanical stability of the CNFs–Ni…
The OH-stretching modes of kaolinite group minerals, namely kaolinite, dickite, and nacrite, are investigated within the density functional theory framework. Good agreement between theoretical and experimentally derived structures is obtained. The total energy of the three polymorphs is found to be similar within 1 kJ…
L-Tyrosine has been intercalated into NiAl, MgAl and ZnAl layered double hydroxides by coprecipitation. The structure and composition of the intercalated materials have been characterized by X-ray diffraction (XRD) and elemental analysis. It is found that intercalation can inhibit racemization of L-tyrosine under the…
A simple, cheap and tunable approach for the decoration of carbon nanotubes by magnetite nanoparticles and their orientation in a magnetic field is reported.
AFM studies on cationic polymer brushes in water (a good solvent) show that brushes in an extended conformation can be easily deformed or indented by an AFM tip. Experiments on polymer brushes in a more collapsed conformation, using methanol-water as a 'poor solvent' environment, show similar properties. Conversely, t…
The inorganic cations of clays with different cation exchange capacities (CECs) have been exchanged with alkyl ammonium ions, in which 1–4 octadecyl chains are attached to the nitrogen atom. In this way, organo-montmorillonites (OMs) with different surface coverage and alkyl chain packing density were obtained. Nanoco…
A detailed kinetic study was performed to elucidate the mechanism of wet chemical etching of silicon in a HF-rich mixture. In contrast to earlier studies, the etch rates were determined by dissolution of only a few milligrams of silicon in carefully thermostatted acid mixtures in order to avoid a change in composition…
Biofilms dominated by pennate diatoms are important in fields as diverse as ship biofouling and marine littoral sediment stabilization. The architecture of a biofilm depends on the fact that much of its mass consists of extracellular polymers. Although most illuminated biofilms in nature are dominated by phototrophs,…
Hydrazide-containing bifunctional nanospheres were covalently coupled on the surface with IgG, avidin, and biotin, to generate novel fluorescent-magnetic-biotargeting trifunctional nanospheres, which can be used in a number of biomedical applications, including visual sorting and manipulation of apoptotic cells as dem…
The bis-guanine monomer G-G forms highly cross-linked, K+ stabilized, polymeric hydrogels that can be reversibly interconverted between gel and sol state via sequential binding and release of K+ by a cryptand undergoing protonation/deprotonation.
Commercial and Statistically Designed Glass Composition (T. Vascott and T.P. Seward III). Gas Solubility and Water Diffusion in Glasses and Melts of Commercial Compositions (J.E. Shelby). Water Diffusion (J.E. Shelby). Solubility and Diffusion of SO3 in Soda-Lime-Silicate Glass Melts at High Temperatures (O.A. Prokhor…
Abstract In our understanding of the structural chemistry of clay minerals, two problems have yet to be satisfactorily dealt with: (a) to accurately assign cations to available octahedral and tetrahedral sites within the 2:1 layer structure of smectites, and (b) to determine the precise distribution of these cations i…
This work investigates the partial discharge (PD) characteristics of twisted pair samples for inverter-fed motor coil under ac and surge voltage conditions. It also discusses the difference in the PD inception characteristics of a twisted pair under 60-Hz voltage and surge voltages with a steep wave front. The PDIV un…