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 series of bistridentate ruthenium(II) polypyridyl-type complexes based on the novel 2,6-di(quinolin-8-yl)pyridine (dqp) ligand have been synthesized and their photophysical properties have been studied. The complexes are amenable to substitution in the 4-position of the central pyridine with conserved quasi-C2v symm…
The preparation of nanoporous size-selective hypercrosslinked polymer networks containing 37−92% of pores small enough for hydrogen adsorption but too small to allow penetration of nitrogen has been studied. Polyaniline and diaminobenzene were coupled with diiodobenzene and tribromobenzene using Ullman and Buchwald sy…
The biological application of up-converting rare-earth nanophosphors (UCNPs) is still restricted because of unfavorable surface properties. Herein, the development of a simple, effective, and versatile method for converting hydrophobic UCNPs into amphiphilic ones, based on epoxidation of the surface oleic acid (OA) li…
The Gram-negative, facultative chemolithoautotrophic bacterium Ralstonia eutropha has been intensively investigated for almost 50 years. Today it is the best studied 'Knallgas' bacterium and producer of poly(3-hydroxybutyric acid). This polyester provides the basis for renewable resource-based biodegradable plastic ma…
Ordered nanocrystalline mesoporous cerium oxide was successfully synthesized using MCM-48 molecular sieves as a hard template. The long-range ordered mesostructure was characterized by low-angle and wide-angle X-ray diffraction (XRD), N 2 adsorption−desorption technique, and transmission electron microscopy (TEM), and…
In this Letter, we show using both a quasi-static model and discrete dipole approximation simulations of nanoparticle pairs that the surface plasmon resonance shift resulting from the electromagnetic coupling between noble metal nanoparticles increases with an increase in the dielectric constant of the medium. As the…
CdS quantum dots (QDs) were self-assembled onto a mesoscopic TiO2 film and used as a seed layer to induce the nucleation and growth of CdSe in the followed CBD process. The SAM-CdS-QD-layer contributes a TiO2/CdSe interface with superior ability in inhibiting the charge recombination. After improvement by a surface pa…
Reproducible switching of the polymorph-dependent excited-state intramolecular proton-transfer (ESIPT) luminescence of an imidazo[1,2-a]pyridine between blue-green and yellow (see picture) is achieved by thermal control of its solid-state molecular packing. Thus, ESIPT is a promising mechanism for packing-to-luminesce…
We found that very thin carbon nanotube films, once fed by sound frequency electric currents, could emit loud sounds. This phenomenon could be attributed to a thermoacoustic effect. The ultra small heat capacity per unit area of carbon nanotube thin films leads to a wide frequency response range and a high sound press…
Defects change essentially not only the electronic properties but also the chemical properties of graphene, being centers of its chemical activity. Their functionalization is a way to modify the electronic and crystal structure of graphene, which may be important for graphene-based nanoelectronics. Using hydrogen as a…
Water and silicon are chemically dissimilar substances with common physical properties. Their liquids display a temperature of maximum density, increased diffusivity on compression, and they form tetrahedral crystals and tetrahedral amorphous phases. The common feature to water, silicon, and carbon is the formation of…
Alkali metal hexahydride alanates, M 3 AlH 6, are known to exist for M = Li, Na, and K. All three release hydrogen, forming MH and Al as the solid phase products. The reverse of this reaction, 6MH + 2Al + 3H 2 → 2M 3 AlH 6, occurs without a catalyst for M = K, occurs only with a catalyst for M = Na, and has not been o…
The ability of Au(13), Au(12)Pd, and Au(11)Pd(2) nanoclusters to bind species typically found in the oxidation and reduction of small hydrocarbon has been investigated by means of atom centered density functional theory calculations. Binding energies of CO(2), H(2), CO, O(2), CH(4), H(2)O, *O, *H, *CHO, *CO(2)H, and *…
We study the packing of colloidal microspheres mixed with polymers in oil-in-water emulsion droplets by evaporation. The addition of polymers produces non-unique configurations of final clusters when the number of particles N inside the droplet is larger than 4. The cluster configurations are classified into three cat…
There has been rapid progress in the industrial application of high-molecular-weight materials. Plastics, in particular, are in wide demand owing to their low prices and high performance. With the likely exhaustion of their petroleum raw materials, more effective ways of utilizing plastics are being sought. The microc…
Effects of the temperature, pH value and CO2 partial pressure on the corrosion rate of P110 oil tube steel in CO2-saturated solution were studied by using the weight loss method. The corrosion products formed on P110 steel's surface were observed by scanning electron microscopy (SEM) and their compositions were analys…
As the material used for fuselage structure must possess low density, high strength to weight ratio, the selection of appropriate materials for fuselage structure is one of the most important tasks. Aluminum metal itself is soft and low in strength. It can be made stronger by giving proper combination of suitable allo…
The mechanical properties of flame-retardant high-density polyethylene/ethylene vinyl-acetate copolymer/magnesium hydroxide (HDPE/EVA/Mg(OH)2) composites for cable materials are usually poor due to the high loading of the filler. In this study, high-energy electron beam irradiation was applied to HDPE/EVA/Mg(OH)2 comp…
Two series of mesogenic molecules have been simulated using molecular dynamics with a full atomistic representation. The two series differ from each other only with the orientation of an ester linker inside the rigid core. Experimentally, this small difference leads to drastically different polymorphisms: one displays…
Regioselectively substituted 2,3-di-O-methylcellulose (23MC) was used as cellulose model in blends with alkylketene dimer (AKD). The interaction between sizing materials (AKD and its hydrolyzed product, h-AKD) and cellulose were examined by the analyses of FTIR spectroscopy. This model study showed that the primary hy…