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。
The dc conductivity, σ, of As2S3 glasses, pure and doped with Ag up to 1.0 at%, and As2S2.82 glass have been measured. Conduction behavior of As2S2.82 glass that contains supplementary As–As bonds was nearly the same as that of As2S3 glass. By introducing 0.1 at% of Ag into As2S3 glass, the dc conductivity markedly in…
All articles of this category Oxidation of 3,5,5-trimethylcyclohex-3-en-1-one (1) with molecular oxygen catalyzed by metal phthalocyanines (Pc) and 5,10,15,20-tetraphenylporphyrins (TPP) including Mn(II), Mn(III), Fe(II), Fe(III), Co(II), Cu(II), and Ru(II) to 3,5,5-trimethylcyclohex-2-ene-1,4-dione (2) was studied. T…
We report the discovery of superconductivity in SnSe with T c around 4.5 K at pressures exceeding 58 GPa. It is conjectured that the high-pressure superconducting modification has the CsCl structure.
Thermoelectric power, electrical resistivity, and Hall effect of p-type Bi2—xSnxTe3 (0 ≤ x ≤ 0.030) single crystals have been measured in the temperature range 4.2 to 300 K. By doping Sn atoms into the host Bi2Te3 lattice, enhancements in the thermopower and resistivity are observed in the intermediate temperature ran…
An understanding of the atomic structure at internal interfaces is of crucial importance for the electronic and structural properties of most advanced materials. Here, we present a detailed study of the atomic structure at a [001] tilt grain boundary of σ5(210) in Tio 2 (rutile). Z‐contrast imaging is used to obtain a…
The formation of hydrated electrons in neutral aqueous ultrasound-exposed solutions has been postulated previously, and several arguments were presented in favor and against their existence. In this work we use a sensitive method for detecting the presence of hydrated electrons in argon-saturated water exposed to 50 k…
The fluctuation theory indicates that the isotropic light scattering loss of amorphous polymer glass, which is used as a material for polymer optical fiber, decreases with the decrease in isothermal compressibility β and refractive index. In order to prepare low light-scattering-loss polymer glass, it is necessary to…
Wetting and brazing studies of sputtering‐deposited, submicrometer thin film filler metal in an Ag—Cu—Ti/Al 2 O 3 system were performed. The interfacial reaction layer between the filler metal and Al 2 O 3 was investigated. It is possible to make a brazing joint even with a reaction layer of less than 100 nm thickness…
Abstract Utilizing high-resolution transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS) and X-raydiffraction (XRD) techniques, we have studied the transition from shallower smectite-rich mudrocks to deeper illite-rich mudrocks in Pliocene-age turbidite sediments from the northern Gulf of Mexico…
Thin layers of grafted polymer chains were produced by ultraviolet light-induced graft polymerization of a hydrophilic monomer, methacryloxyethyl phosphate, onto the Ar plasma-pretreated film surface of high-density polyethylene. The hydrogen-bonding interactions in the grafted polymer and the wettability of the graft…
‐based perovskites are of interest as cathode material for the development of advanced solid oxide fuel cells operating at temperatures significantly lower than 900°C. The compatibility of the selected materials is necessary to guarantee long‐term operation of a solid oxide fuel cell. Systematic investigations on the…
Starting from α-tetralone and maleic anhydride, novel AB-type amino anhydrides 3 and 5 were synthesized in good yields and obtained in high purity without self-condensation. The tetrahydro[5]helicene monomer 3 could be readily polymerized in m -cresol to give polyimide 8 with high molecular weight. Although direct pol…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHost−Guest Complex Dependent Regioselectivity in Substitution Reactions of Chlorocyclotriphosphazene-Containing PNP-Crowns with AlkylenediaminesKrystyna Brandt, Iwona Porwolik, Mariola Siwy, Teobald Kupka, Robert A. Shaw, David B. Davies, Michael B. Hursthouse, and Geo…
The diffusion profile of small helium bubbles along grain boundaries in in-situ aluminium has been examined by electron microscopy observation. It was found that bubbles moved two-dimensionally in the general grainboundary interface with a misorientation about the axis [122]. The occurrence 2 * ) ( P R t probability,…
This paper presents a generalization of the unidimensional deformation equation based on the van Wyk theory. The derivation considers the effect of uncompressed areas between contacting fibers. Theoretical results are verified by the experimental work of Baljasov. The solution is extended to cover bidimensional deform…
Adsorption behavior of the hydrocarbons n -hexane, n -octane, cyclohexane, neopentane, and benzene on microporous activated carbon fibers (ACFs) was studied by use of molecular adsorption and adsorption calorimetry. The calorimetric aspects were discussed in connection with pore characteristics determined by nitrogen…
The thermoelastic behavior and equilibrium stress–strain properties of chitosan films lightly crosslinked with gluteraldehyde and swollen with water were studied. Precautions were taken to preclude changes in the swelling ratio of swollen sample films during the experiment. The results indicate that at relatively low…
The shear response of a Nicalon‐reinforced ceramic‐matrix composite was investigated using Iosipescu tests. Damage was characterized by X‐ray, optical, and SEM techniques. The large inelastic strains which were observed were attributed to rigid body sliding of longitudinal blocks of material. These blocks are created…
Using an off-lattice Monte Carlo bead-spring model of a chain in a random environment, we study chain conformations and dynamic scaling of diffusivity and relaxation times with chain length N and density of the host matrix ${\mathrm{C}}_{\mathrm{obs}}$. Our simulational results show that with growing ${\mathrm{C}}_{\m…
Ab initio geometry optimizations and normal mode analysis have been performed on a series of oligomers of leucoemeraldine base (LB, the fully reduced amine form of polyaniline) over conformational variations with the HF/6-31G* basis set. Aniline was used to obtain 12 force constant scaling factors with the best vibrat…