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。
RhO2 belongs to the family of conducting platinum group metal oxides, which have attracted attention as new capacitor electrode materials for dynamic random access memories (DRAMs) and nonvolatile ferroelectric random access memories (FeRAMs). Rh, Rh2O3, and RhO2 thin films were prepared by sputtering and their XPS sp…
The simultaneous addition of 0.5 wt% Cr and Fe was found to enhance the densification of TiB 2 . The densities of specimens that were sintered for 2 h at 1800° and 1900°C were 97.6% and 98.8% of the theoretical value, respectively. The mechanical properties of the specimen sintered at 1800°C, which had a strength of 5…
A highly active, three-dimensional, mesoporous titanosilica, TiTUD-1, with comparable properties to Ti-grafted mesoporous silica MCM-41, has been prepared in a one-step synthesis. A non-surfactant chemical, triethanolamine, was used as a template molecule. Triethanolamine easily forms complexes with titanium alkoxides…
A successful method to fabricate large-area, microstructured sieve materials (see Figure) from a poly(p-phenylene–vinylene) (PPV) precursor and from poly(3-octylthiophene) (P3OT) is reported. Strong periodicity and a large, defect-free area make this structure extremely interesting for polymer optoelectronics. The und…
Acoustic transducers made of a charged cellular polymer called EMFi have been designed and investigated with respect to air-borne and water-borne sound. The longitudinal transducer constant is around 90 pC/N, strongly exceeding the values of other piezoelectric polymers. This is mainly attributed to the very low Young…
Abstract X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), surface area measurements, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to examine the surface properties of organosilane-modified smectite-type aluminosilicate clays. Organic modified clays derived from the r…
Experimental studies of the interactions of small transition-metal cluster anions with carbonyl ligands are reviewed and compared with neutral and cationic clusters. Under thermal conditions, the reaction rates of transition-metal clusters with carbon monoxide are measured as a function of cluster size. Saturation lim…
Core yarns are known as multi-component yarns in which one component, the core material, stays nearly at the center of the yarn while the others cover it. Stretch knitted or woven fabrics can be made from core yarns in which the core is an elastomeric filament such as Dorlastan®, Lycra®, Glospan®, etc., and the coveri…
In this paper, the effects of long-term storage in compressed cold hibernated elastic memory (CHEM) polyurethane foam, a kind of shape memory polymer, are investigated experimentally. The foams were pre-strained at a high temperature, which was above the glass transition temperature, to 80% and 93.4%, respectively, an…
This paper presents measurements of partial discharge (PD) from water droplets on a silicone rubber insulating surface in an ac field. Tests are done by placing droplets on the surface using a micro-pipette, and by condensing water in a controlled humidity chamber. The field enhancement factor due to droplets placed o…
Three low-alloy carbon steels were given different heat treatments before testing in a corrosion flow loop at 80°C. Both the general corrosion rate and the susceptibility to form localized attack were significantly affected by the tempering temperature and the size and distribution of the carbides. Two of the steels c…
Insect silk is made up of structural fibrous (fibroins) and sticky (sericins) proteins, and contains a few small peptides of hitherto unknown functions. We demonstrate that two of these peptides inhibit bacterial and fungal proteinases (subtilisin, proteinase K and pronase). These 'silk proteinase inhibitors' 1 and 2…
The magnetic, transport, and structural properties of (La0.1Sr0.3)MnO3 films deposited on MgO (001) are reported as a function of thickness and substrate temperature. The substrate temperature is fundamental in determining the structural properties and a deviation from the optimum temperature (680 °C) leads to grain b…
Poly(propylene) compounds containing organophilic layered nanosilicates were prepared by means of melt extrusion at 210°C in order to investigate the influence of maleic anhydride-grafted poly(propylene) (PP-g-MA) as a compatibilizer on morphology development and rheological properties. It was found that the addition…
Incongruence between different data sets remains one of the central issues in systematics. Numerous tree- based and character-based tests to identify incongruence have been developed, and each has strengths and weaknesses (e.g., for reviews, see Cunningham 1997a;Johnson and Soltis 1998 ). Currently, one of the most wi…
The local structure of an optically active center in erbium-doped zinc oxide (ZnO:Er) thin film produced by a laser ablation technique and its optical activation process are investigated by Er LIII-edge x-ray absorption fine structure analysis using a synchrotron radiation as an x-ray source. In as-ablated ZnO:Er thin…
We have studied the ZrO2(111)/Ni(111) interface using the ultrasoft pseudopotential formalism within density functional theory. We find that ZrO2(111) adheres relatively strongly at the monolayer level but thicker ceramic films interact weakly with the Ni-substrate. We argue that the cohesion changes character from do…
Among the mesoporous silica micellar templated structures (MTSs), MSU-X silica, obtained through an N0I0 assembly between non-ionic polyethyleneoxide-based surfactants (N0) and silica neutral inorganic precursors (I0), exhibits a regular ordered structure with a 3D wormhole porous framework and an easily controlled po…
Phasins are proteins that are proposed to play important roles in polyhydroxyalkanoate synthesis and granule formation. Here the phasin PhaP of Ralstonia eutropha has been analyzed with regard to its role in the synthesis of polyhydroxybutyrate (PHB). Purified recombinant PhaP, antibodies against PhaP, and an R. eutro…
The application of many polymers is limited by their inherent flammability. Various routes are available to overcome this drawback through the inclusion of additives to inhibit ignition. These function by different mechanisms, tend to be polymer specific and may contribute to or suppress the smoke produced during burn…