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。
Abstract The surface chemistry of a commercial soda‐lime silicate glass is shown to change during a long‐duration XPS experiment wherein the glass surface was exposed to the monochromatic x‐rays and low‐energy electrons (0.2–5 eV) that compensate for the charging of the surface. The atomic percentage of sodium increas…
A soft ellipsoid model for Gaussian polymer chains is studied, following an idea proposed by Murat and Kremer [J. Chem. Phys. 108, 4340 (1998)]. In this model chain molecules are mapped onto ellipsoids with certain shapes, and to each shape a monomer density is assigned. In the first part of the work, the probabilitie…
The synthesis of amino acid based dendrimers 25 (fifth generation, 32 endgroups), 30 (fourth generation, 81 endgroups), chiral dendrimer 23 (third generation, 8 endgroups) as well as core-modified dendrimers 34 and 38 by the convergent method is described. The amino acid building blocks are derived from hydroxybenzoic…
Ultrafine β‐SiC powders mixed with 7 wt% Al 2 O 3, 2 wt% Y 2 O 3 , and 1.785 wt% CaCO 3 were hot‐pressed and subsequently annealed in either the absence or the presence of applied pressure. Because the β‐SiC to α‐SiC phase transformation is dependent on annealing conditions, the novel processing technique of annealing…
Dew retted hackled long flax was treated with propyltrimethoxysilane, phenylisocyanate, and maleic acid anhydride modified polypropylene (MAA-PP). The wetting parameters of the untreated and treated flax fibers were obtained with dynamic contact angle measurements. The results showed that the treated flax fibers are l…
Abstract This investigation involves the recycling of precipitated silica-filled silicone rubber using a continuous ultrasonic reactor. The processing conditions utilized in devulcanization of the filled systems were similar to those in our previous work on unfilled systems. Significant differences were observed in de…
The monoanion of 2,6-bis(phenylamino)pyridine (HBPAP(-)) has been found to support quadruply bonded Cr(2)(4+) and Mo(2)(4+) units in Cr(2)(HBPAP)(4) (1) and Mo(2)(HBPAP)(4) (2). The corresponding dianion BPAP(2)(-) was able to stabilize the trinuclear complexes, (TBA)(2)Cr(3)(BPAP)(4) (3) and (TBA)(2)Ni(3)(BPAP)(4) (4…
Polyferrocenylsilane microspheres are readily formed under mild reaction conditions. Chemical oxidation leads to positively charged particles that undergo electrostatic self-assembly with smaller negatively charged silica microspheres, which leads to composite superstructures (see Figure), whereas pyrolysis leads to s…
This paper presents the results of a large-scale atomistic simulation study of the process of emission of multiple dislocations in Al. We use embedded-atom method potentials based on ab-initio data and molecular statics and dynamics techniques to study the configuration of the crack tip as the dislocation emission pro…
Sodium sulfonate-functionalized poly-(ether ether ketone)s derived from Bisphenol A with a degree of sulfonation up to 2.0 were synthesized by aromatic nucleophilic polycondensation of various amounts of 5,5′-carbonylbis(2-fluorobenzenesulfonate) (1), 4,4′-difluorobenzophenone (2) and Bisphenol A (3). Copolymers showe…
The transduction of sound into light through the implosion of a bubble of gas leads to a flash of light whose duration is delineated in picoseconds. Combined measurements of spectral irradiance, Mie scattering, and flash width (as determined by time-correlated single-photon counting) suggest that sonoluminescence from…
Abstract Recent experiments on deformation of semiconductors show an abrupt change in the variation in the critical resolved shear stress τY with temperature T. This implies a change in the deformation mechanism at a critical temperature T c. In the cases examined so far in our laboratories (Case Western Reserve Unive…
Electronic structures of Sn-doped In 2 O 3 (ITO) have been investigated for the first time by using a first-principles calculation method based on the density functional theory. Calculated partial density of states (PDOS) analyses showed that a Sn atom substituted for an indium one formed three impurity bands with s-l…
We have modified the surface of hydrophilic silicon oxide by chemically anchoring an organic monolayer bearing terminal phosphorylcholine (PC) groups and subsequently characterized the structure of the PC layers and their effectiveness in inhibiting the deposition of a range of model proteins. The PC compound was synt…
The flame spray pyrolysis of alcohol‐soluble precursors allows the synthesis of mullite‐composition nanopowders (average size of ∼60–100 nm) that, when annealed carefully, provide processable nano‐mullite powders. The powders have been characterized using several spectroscopic and microscopy methods, including thermal…
The properties of nanoscale spheres and tubes are of recent interest due to the discovery of the fullerene molecule and the carbon nanotube. These carbon structures can be modeled as nanoscale spherical or cylindrical shells. In this article, these nanostructures are treated in the thin shell approximation with the el…
Mica/epoxy and oil/cellulose have dominated insulation systems of rotating machines and power transformers for over 100 years. In recent years, however, XLPE cables have been introduced to generators and transformers as HV windings. This has resulted in a new type of generator (Powerformer/sup TM/), a new type of wind…
We have presented a numerical technique for analyzing one‐dimensional transient temperature distributions in a circular hollow cylinder that was composed of functionally graded ceramic–metal‐based materials, without considering the temperature‐dependent material properties. The functionally graded material (FGM) cylin…
The Bit formation using atomic force microscopy (AFM) was studied on 270-nm-thick 〈111〉 preferentially oriented Pb(Zr0.4Ti0.6)O3 (PZT) films prepared by the sol-gel process. To minimize the cantilever-sample capacitive force interaction, the experiment was carried out at or near the sample edge. Bit formation was inve…
Matrilin-4 is the most recently identified member of the matrilin family of von Willebrand factor A-like domain containing extracellular matrix adapter proteins. Full-length matrilin-4 was expressed in 293-EBNA cells, purified using affinity tags, and subjected to biochemical characterization. The largest oligomeric f…