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。
A comprehensive, multi-physics, multi-dimensional model has been developed to simulate solid oxide fuel cells (SOFCs). The model fully couples electrochemical kinetics with multi-dimensional gas dynamics and multi-component transport of species. The developed model is a full cell model, including all components of SOF…
SBA-1 mesoporous silica has been synthesized in different crystal shapes from C18TMACl–sodium silicate–H2SO4–H2O at pH values between 1.0 and 2.0.
Ph3SnX reacts with L-lactide in the order X = NMe2 ∼ OMe ≫ OPri > OBut in the initial ring-opening event. The rate of ring-opening of methyl substituted 1,4-dioxane-2,5-diones decreases with methyl substitution and ring-opening of 3,3,6,6-tetramethyl-1,4-dioxane-2,5-dione is not observed. From studies of the reaction…
A one-step surfactant assisted synthesis pathway was developed leading to novel hierarchical macro-meso- (or micro-)porous aluminosilicates made of an assembly of macrochannels with openings between 0.5 and 2.0 microm and wormhole-like amorphous walls with tunable pore sizes.
CoS and MnS nanowires were prepared through a simple chemical vapor deposition process. The adopted synthetic route is expected to be applicable for the synthesis of other metal sulfide semiconductor nanowires.
This paper presents results of preliminary work done on developing a new technique to produce magnetically aligned structure in selected regions of rapidly solidified alloys. Rapid solidification of the Bi-20 at%Mn alloy resulted in dispersion of the fine BiMn grains in the supersaturated Bi-rich matrix. Low magnetiza…
Treatment of [M(H2Li)] with U(acac)4 in refluxing pyridine led to the formation of the trinuclear complexes [{MLi(py)x}2U] [L1 = N,N′-bis(3-hydroxysalicylidene)-2,2-dimethyl-1,3-propanediamine and M = Ni, Cu or Zn; L2 = N,N′-bis(3-hydroxysalicylidene)-1,3-propanediamine and M = Cu or Zn; L3 = N,N′-bis(3-hydroxysalicyl…
Abstract The influence of a mixed additive of lanthanum stearate and stearic acid on the crystalline characteristics of isotactic polypropylene (iPP) has been investigated. The results of the wide‐angle X‐ray diffraction (WAXD) measurements and the melting behaviour examination by differential scanning calorimetry (DS…
The continuous interest in carbon nanotubes (CNTs) and nanotube arrays has led us to discover new routes of high-yield and low-cost synthesis of CNTs with controlled tube structure. Here we show that a dilute solution of FeCl 3 in toluene and N, N -dimethylaminoacetate is a high-efficiency floating catalyst precursor…
The negative ion photoelectron imaging technique is illustrated using two relatively simple atomic and molecular anion systems, and then applied to the study of a cluster system. Photoelectron images of I- and CS2- at 267 nm and 800 nm respectively are presented. Photoelectron spectra and angular distributions are obt…
Di-2-pyridylmethane (1) and the bridging ligands 1,1,2,2-tetra(2-pyridyl)ethane (2), 1,1,2,2-tetra(2-pyridyl)ethan-2-ol (3) and tetra(2-pyridyl)ethene (4) chelate to metal atoms with the formation of 6-membered chelate rings. The utility of these ligands in coordination chemistry and as metallosupramolecular synthons…
The syntheses of [FeL2]X2 (L = 2,6-dipyrazol-1-ylpyrazine [L2H], 2,6-bis{3-methylpyrazol-1-yl}pyrazine [L2Me], 2,6-bis{3,5-dimethylpyrazol-1-yl}pyrazine [L2Me2] or 2,6-bis{3-[2,4,6-trimethylphenyl]pyrazol-1-yl}pyrazine [L2Mes]; X− = BF4− or ClO4−) are described. Solvent-free [Fe(L2H)2][BF4]2 and [Fe(L2H)2][ClO4]2 exhi…
This paper describes the metallurgical science used to develop a new, weldable, high-strength linepipe (X120) for the transport of natural gas. A domain-based microstructure design has been used to ensure ductile fracture behavior at temperatures down to −20°C. Ultra refinement involving careful chemistry design and t…
The injection of seawater into oilfield reservoirs to maintain reservoir pressure and improve secondary recovery is a well-established, mature, operation. Moreover, the degree of risk posed by deposition of mineral scales to the injection and production wells during such operations has been much studied. However, the…
Abstract Polyurethane elastomers were prepared with hydroxytelechelic polybutadiene (HTPB) as polyol, modified 4,4′‐diphenylmethane diisocyanate (modified MDI) as liquid polyisocyanate, and phosphonate diols as chain extenders and flame retardant compounds. These phosphonate diols were synthesized by radical thiol–ene…
CaCu3Ti4O12 (CCTO) films, prepared by pulse laser deposition, are characterized by X-ray diffraction, Raman scattering, and infrared reflection spectroscopy. Similarly to CCTO bulk materials, the films are found to exhibit a room temperature dielectric constant as high as 10000 at microwave frequencies. Temperature-de…
Gold nanoparticle doped hollow polyelectrolyte microcapsules (gold-doped capsules) were prepared by the layer-by-layer self-assembly method. After sequential adsorption of oppositely charged polyelectrolytes of poly(styrenesulfonate) sodium salt (PSS), poly(allylamine hydrochloride) (PAH) or gold nanoparticles onto me…
We describe the synthesis and photophysical properties of new Ru(II) complexes bearing different numbers of pyrenylethynylene substituents in either the 5 or 5,5′ positions of 2,2′-bipyridine. Static and dynamic absorption and luminescence measurements reveal the nature of the lowest excited states in each molecule. T…
Two parallel pathways have been identified for oxygen reduction and evolution on mixed ionic electronic conductors (MIECs). Charge transfer may proceed by reaction at the triple-phase boundary to consume or produce oxygen adsorbed on the surface of the MIEC. Alternatively, charge transfer may proceed by reaction of ox…
An unusual red-shift of phthalocyanine Q-band upon aggregation in non-aqueous media has been observed for antimony(III) derivative and has been studied by using optical absorption and magnetic circular dichroism spectroscopy.