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。
Phase transitions in calcite, a naturally occurring crystalline form of CaCO 3 , have been investigated by three different experimental techniques: (1) in-situ X-ray diffraction (XRD) using synchrotron radiation to 6 GPa and 1750 °C in a cubic anvil press; (2) Raman scattering to 10 GPa at room temperature using a dia…
Application of about 0.8 GPa pressure is sufficient to induce the neutral-ionic transition in the mixed stack charge-transfer crystal 2-chloro-5-methyl-p-phenylenediamine--2,5-dimethyl-dicyanoquinonediimine (ClMePD-DMeDCNQI). The ionicity increases continuously from $\ensuremath{\sim}0.35$ at ambient conditions to $\e…
Argon ion milling is the conventional means by which mineral sections are thinned to electron transparency for transmission electron microscope (TEM) analysis, but this technique exhibits significant shortcomings. In particular, selective thinning and imaging of submicrometer inclusions during sample milling are highl…
Wood-plastic composites are being examined for a greater number of structural-type applications that may be exposed to different environments, some of them adverse. This paper discusses the influence of moisture absorption on the mechanical properties of wood flour-polypropylene composites. Composites filled with 20%…
TiO2 thin films with a hexagonal mesoporous structure and an anatase-type crystalline framework are easily synthesized by a sol–gel method at low pH, using an EO–PO–EO block copolymer as template. While the TiO2/polymer superstructure originally has a primitive cubic structure, annealing at 150 °C affords a phase tran…
Nanometer‐sized zinc aluminate (ZnAl 2 O 4 ) particles were synthesized from heterometal alkoxides, [ZnAl 2 (OR) 8 ], possessing an ideal cation stoichiometry for the ZnAl 2 O 4 spinel. ZnAl 2 O 4 is formed at 400°C, which is the lowest temperature reported for the formation of monophasic ZnAl 2 O 4 . 27 Al magic‐angl…
The impedance of a BaTiO 3 (BT)-based multilayer ceramic capacitor with a nickel internal electrode (Ni-MLCC) was investigated by measuring the frequency domain at various temperatures. All the obtained impedance data could be successfully fitted to a 4-RC section electrical equivalent network. The 4-RC section electr…
Abstract Flame retardant nanocomposites are synthesized by melt‐blending ethylene–vinyl acetate copolymers (EVA) with modified layered silicates (montmorillonites). Thermogravimetric analysis performed under different atmospheres (nitrogen and air) demonstrated a clear increase in the thermal stability of the layered…
Finite element calculations of dynamic fracture based on embedding cohesive surfaces in a continuum indicate that the predictions are sensitive to the cohesive law used. Simulations were performed on a square block in plane strain with an initial edge crack loaded at a constant rate of strain, Cohesive laws that have…
To better understand thermal strain in electrochemical ceramics, the temperature and oxidation‐state dependence of lattice volume in La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCF) were measured. Large values in the apparent thermal expansion coefficient at high temperature (>50 ppm/°C) were caused by changes in oxygen co…
A defined and controllable permeability of the capsule wall of hollow polyelectrolyte capsules has been achieved. The walls of these capsules can be switched between an open and a closed state with respect to macromolecules by adjusting the salt concentration of the solution in which the capsules are dispersed. The Fi…
Introduction 499 2. Conduction in thin ®lms and wires 505 3. Magnetic e ects in thin conductors 515 4. The anomalous skin e ect
The relationship between the behavior of the temperature-dependent heat capacity at constant pressure measured in different magnetic fields and the magnetocaloric effect in magnetic systems with and without discontinuous change of entropy is discussed. It is shown that the two are directly related to each other, and i…
In2O3 nanofibers have been prepared by using a thermal evaporation–oxidation method. The nanofibers generally show rectangular cross sections (see Figure) with different width-to-thickness ratios. The photoluminescence spectrum of these nanowires shows light emission in the blue-green region. By doping with other elem…
A simple classical generalization of the Drude formula is derived based on the impulse response approach and Poisson statistics. The new feature is a parameter c, which is a measure of persistence of velocity. With negative values of c, it is possible to mimic the infrared properties of poor metals that display a mini…
Mono- and bimetallic colloidal particles have gained increasing attention in science and application throughout the last several years. In this contribution, we present a synopsis of the wet chemical syntheses of these materials and survey potential applications in catalysis and materials science. Methods for the char…
Abstract An Important aspect with respect to optimal mechanical performance of fiber reinforced composites in general and durability in particular is the optimization of the interfacial bond between fiber and polymer matrix. The quality of the fiber‐matrix interface is significant for the application of natural fibers…
A seed-mediated growth approach to improved monodispersity of nanoparticles that involves controlling nucleation and growth in solution is presented. Using this approach, spheroidal and rod-like gold particles (see Figure) could be prepared in the presence of a rod-like micellar template. The aspect ratio of the parti…
UNLABELLED: InterProScan is a tool that scans given protein sequences against the protein signatures of the InterPro member databases, currently--PROSITE, PRINTS, Pfam, ProDom and SMART. The number of signature databases and their associated scanning tools as well as the further refinement procedures make the problem…
In a clonal culture of a freshwater dinoflagellate belonging to the Peridinium umbonatum STEIN species complex, plate pattern variability and plate overlap pattern were investigated and documented by scanning electron microscopy. In addition, various field populations were investigated. All possible plate pattern vari…