Starch-derived polyols for polymer technologies: preparation by hydrogenolysis on metal catalysts
The first page of this article is displayed as the abstract.
Materials Literature
文献浏览
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。
Transition from viscous to elastic-based dependency of mechanical properties of self-assembled type I collagen fibers
Fibrous collagen networks are the major elements that provide mechanical integrity to tissues; they are composed of fiber forming collagens in combination with proteoglycans and elastic fibers. Using uniaxial incremental tensile stress–strain tests we have studied the viscoelastic mechanical properties of self-assembl…
Core/shell-structured bimetallic nanocluster catalysts for visible-light-induced electron transfer
Abstract It has been found that the bimetallic nanoclusters often have so-called core/shell structure if they are prepared by alcohol-reduction of two kinds of noble metal ions in the presence of a water-soluble polymer like poly(N-vinyl-2-pyrolidone)(PVP), and that the core/ shell structured bimetallic nanoclusters h…
Effects of pH on precipitation of quasi-crystalline calcium silicate hydrate in aqueous solution
C-S-H samples were precipitated from aqueous solution containing Ca(NO 3 ) 2 and Na 2 SiO 3 with an initial Ca/Si molar ratio of 1·3, when the pH value in the solution was varied by adding HNO 3 or NaOH. A pH > 10·9 was required to obtain quasi-crystalline C-S-H, and the CaO/SiO 2 ratio of the precipitate was incre…
Combinatorial solid state materials science and technology
Conventional 'one by one' synthesis approach has been a major rate limiting step in the systematic exploration of increasingly complex materials for the demanding new technologies. New concepts of 'combinatorial chemistry' are presented for the substantially efficient and cost-effective parallel synthesis and optimiza…
AC Impedance Analysis of Bifunctional Air Electrodes for Metal-Air Batteries
The activity and stability of bifunctional air electrodes for electrically rechargeable metal air batteries were investigated using ac impedance spectroscopy. The poly(tetrafluoroethylene) bonded electrodes consisted of a perovskite‐type catalyst dispersed on high surface area carbon (Ketjen black) or on graphitized c…
Electrochemical Characterization of the Nanoporous Honeycomb Diamond Electrode as an Electrical Double-Layer Capacitor
Electrochemical Characterization of the Nanoporous Honeycomb Diamond Electrode as an Electrical Double‐Layer Capacitor, Honda, K., Rao, Tata N., Tryk, D. A., Fujishima, A., Watanabe, M., Yasui, K., Masuda, H.
Origin of the Blue Shift in Ultraviolet Absorption Spectra of Nanocrystalline CeO<SUB>2−<I>x</I></SUB> Particles
Blue shifts of the ultraviolet absorption edge due to the direct-type charge-transfer transition between O 2p and Ce 4f bands are observed in monodisperse CeO2−x nanoparticles, which are produced as toluene sols by a successive micro-emulsification method. The blue shift is closely proportional to the difference in th…
Synthesis of mesoporous TiO2 with a crystalline framework
A thermally stable mesoporous TiO2 with a crystalline framework and ordered large pores is synthesized using a block copolymer as a structure-directing agent through an N0I0 assembly pathway, followed by a hydrothermal process.
Structural and physical characterisation of transparent conducting pulsed laser deposited In2O3–ZnO thin films
Indium–zinc oxide thin films, with compositions ranging from In2O3 to ZnO, were prepared by pulsed laser deposition using a substrate temperature of 500 °C and an oxygen pressure of 10−3 mbar. X-Ray diffraction studies coupled with transmission electron microscopy revealed that the texture and the structure of the fil…
An Electrochemical Approach to Predicting Long-Term Localized Corrosion of Corrosion-Resistant High-Level Waste Container Materials
Lifetime predictions of containers used for the disposal of high-level radioactive waste (HLW) are necessary to determine the overall performance of a HLW repository. Failure of the containers by localized corrosion and release of radionuclides into the accessible environment may occur if chloride-containing groundwat…
Radiation-Induced Amorphization
### History and applications The earliest description of a change in mineral property caused by radiation-damage was by Jons Jacob Berzelius in 1814. Berzelius, a Swedish physician and mineral chemist, was certainly one of the most eminent scientists of his century, discovering the elements cerium, selenium and thoriu…
Effect of punching on electrical steels: Experimental and numerical coupled analysis
Punching electrical steels drastically alters their magnetic properties near the cutting edges, which should be accounted for when designing machines. A simple magneto-mechanical coupled finite element analysis, suitable for fully processed grades, is proposed in order to model the consequences of this local degradati…
Conversion of diatoms to clays during early diagenesis in tropical, continental shelf muds
Research Article| December 01, 2000 Conversion of diatoms to clays during early diagenesis in tropical, continental shelf muds Panagiotis Michalopoulos; Panagiotis Michalopoulos 1Marine Sciences Research Center, State University of New York, Stony Brook, New York 11794-5000, USA Search for other works by this author o…
Network self-assembly patterns in Main Group metal chalcogenide-based materials
Technological interest in the design of multifunctional microporous materials has stimulated recent research into the development of mild solventothermal techniques for the construction of lamellar and framework Main Group chalcogenidometalates. Reaction pathways from elemental or metal chalcogenide sources can be inf…
Thermosetting polymers from cationic copolymerization of tung oil: Synthesis and characterization
The cationic copolymerization of tung oil with the divinylbenzene comonomer initiated by boron trifluoride diethyl etherate produces promising plastics. The gel times are largely dependent on the relative composition and the reaction conditions and vary from a few seconds to 1 h. Controlled reactions producing homogen…
NLO-active zinc(ii) and cadmium(ii) coordination networks with 8-fold diamondoid structures
Bis{4-[2-(4-pyridyl)ethenyl]benzoato}-zinc(II ) and -cadmium(II) with 8-fold diamondoid network structures have been synthesized under hydro(solvo)thermal conditions and exhibit powder second harmonic generation efficiencies comparable to that of technologically important lithium niobate.
Novel nanoscale gas containers: encapsulation of N2 in CNx nanotubes
Gaseous N2 has been efficiently introduced in the hollow cavities of aligned CNx nanotubes (15–80 nm od) by pyrolysing a jet (spray) solution of Fe(C5H5)2 and PhCH2NH2 in an Ar atmosphere at 850 °C; the aligned material consist of large arrays (2.5 cm2) of CNx (x < 0.05) ‘bamboo-like’ nanotubes (<100 μm in length); hi…
Impedance Studies of Oxygen Exchange on Dense Thin Film Electrodes of La[sub 0.5]Sr[sub 0.5]CoO[sub 3−δ]
Solid‐state electrochemical cells with dense oriented thin film electrodes of (LSCO) were prepared on (100) surfaces of single‐crystal disks of yttria‐stabilized zirconia (YSZ) by the pulsed laser deposition technique. Oxygen exchange at the electrodes was studied with alternating current impedance spectroscopy under…
A review of cation-ordered rock salt superstructure oxides
The types of structures formed when two or more cations occupy the sodium sites in the NaCl unit cell in a non-random manner are reviewed with reference to the cation arrangement in layers of close-packed octahedra and the cation arrangement in the NaCl subcell. Factors influencing the stability of particular structur…