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 A new unsymmetrical chiral thioindigo dopant 6‐[( R , R )‐2,3‐difluorooct‐1‐yloxy]‐5′‐nitro‐6′‐[( R )‐2‐octyloxy]thioindigo ( 4 ) designed to photoinvert the sign of spontaneous polarization ( P S ) in a ferroelectric chiral smectic C (SmC*) liquid crystal was prepared using a synthetic approach previously de…
A new approach to the modification of carbon nanotubes with biomolecules for the development of nanoscale biosensors is presented. Alkaline phosphatase was immobilized on the surface of multi-wall carbon nanotubes utilizing a layer-by-layer methodology. Carbon nanotubes were incubated with streptavidin, resulting in t…
The optical, magnetooptical, and electric properties of epitaxial (La 1− x Pr x ) 0.7 Ca 0.3 MnO 3 films (0≤ x ≤1) grown by MOCVD on LaAlO 3 and SrTiO 3 substrates were studied. It is shown that the decrease in the average cation radius resulting from isovalent substitution of the Pr for La ions brings about a lowerin…
Nanostructured porous silica particles with sizes in the micrometer to sub‐micrometer range are of great interest due to their potential applications as catalyst supports and nanocomposite materials. However, if these particles are to be used in industry, a process must be developed to affordably produce them on a lar…
Ten virgin powder samples of poly(tetrafluoroethylene) (PTFE) were examined by differential scanning calorimetry (DSC) and wide-angle X-ray scattering (WAXS). The samples, prepared by emulsion or nanoemulsion polymerization, differed by average molecular weight and particle size. DSC was used to study the trends of th…
The dynamics of pitch jumps in cholesteric layers with a finite surface anchoring strength under variations in temperature is investigated theoretically. General expressions are presented that connect the dynamics of pitch jumps with the parameters that determine the process, such as the viscosity, the specific form o…
This paper is concerned with two-phase flow regimes and characteristics of coolant natural circulation around a reactor pressure vessel (RPV) in in-vessel retention (IVR) scenarios when the external vessel flooding is applied to arrest a hypothetical core melt accident. We focus on the AP1000 advanced plant design, an…
By using the time-resolved small-angle light scattering (TRSALS) technique, we present the real-time measurement of the physical gelation process for a crystalline polymer. To investigate the growth kinetics, a complete picture of the gel structural formation should be differentiated into the nucleation and growth of…
A survey of the published literature on undercooled metallic and oxide melts suggests that phase selection during solidification can be categorized as nucleation controlled or growth controlled. Common characteristics governing the phase-selection pathway have been identified for various alloy systems. It is recognize…
Al 2 O 3 reinforced by SiC whiskers (Al 2 O 3 /SiC‐W) was hot‐pressed to investigate the fatigue strength of crack‐healed specimens at high temperature. Semielliptical surface cracks of 100 μm surface length were introduced on each specimen surface. These specimens were crack‐healed at 1300°C for 1 h in air, and stati…
A time-dependent model of temperature in magnetization and demagnetization processes is developed based on thermodynamic and heat transfer laws, material properties, and variable-field magnet parameters. Test results of a magnetic refrigeration test bed are compared with the model calculation. The model can be used to…
Abstract Highly stretchable and powerful PPy film actuators, prepared electrochemically from a methyl benzoate solution of tetra-n-butylammonium tetrafluoroborate (TBABF4), showed a positive correlation between the electrochemical stress and the mechanical tensile strength. The more flexible CF3SO3−-doped PPy suits mu…
Protein geranylgeranyltransferase type I (GGTase I) catalyzes the attachment of a geranylgeranyl lipid group near the carboxyl terminus of protein substrates. Unlike protein farnesyltransferase (FTase) and protein geranylgeranyltransferase type II, which require both Zn(II) and Mg(II) for maximal turnover, GGTase I tu…
The photoconductivity (PC) of TlGaS 2 layered single crystals was investigated in the 77−300 K temperature, 1000−2500 lx excitation intensity, 10−25 V applied voltage, and 415−535 nm wavelength ranges. Both the alternating current photoconductivity (ac-PC) and the spectral distribution of the photocurrent were studied…
The oxidation processes of Cu(111) with a hyperthermal O2 molecular beam (HOMB) were studied using high-resolution x-ray photoemission spectroscopy in conjunction with a synchrotron radiation source. The O-uptake curves were precisely measured at ∼300 K when irradiating with 2.3 and 0.6 eV HOMB on a Cu(111) surface. A…
High-efficiency hybrid systems (HS) based on the coupling of solid oxide fuel cells (SOFCs) and gas turbines (GT) are analyzed in this paper through the use of two different approaches: simplified and detailed SOFC models. The simplified model, already presented by the authors, is very useful for HS design and off-des…
Abstract The suitability of alternative fatty food simulants on overall migration determination under thermal treatment and microwave heating were analysed for different plastic materials commonly used for packs subjected to thermal treatment or microwave heating. Elevated temperature and microwave heating increased o…
Mesoscale silicon pillars are formed when silicon wafers are irradiated by a nanosecond excimer laser operating at 308 nm and incident fluence of ∼3 J cm−2. The morphology of the pillars responds to the chemical composition of the gas phase above the Si surface. Postprocessing can also be used to change the structure…
The critical resolved shear stress (CRSS) for a dislocation percolating through penetrable obstacles with different pinning strength is derived analytically. The stability of dislocation–obstacle configurations is determined by evaluating the configurational entropy. The analytical results imply a superposition law fo…
The surface modifications produced by treatment of a synthetic vulcanized styrene-butadiene rubber (R1) with oxidizing (oxygen, air, carbon dioxide) and nonoxidizing (nitrogen, argon) RF plasmas have been assessed by ATR-IR and XPS spectroscopy, SEM, and contact angle measurements. The effectiveness of the treatment d…