Aragonite growth on single-crystal substrates displaying a threefold axis
Aragonite was grown epitaxially under calcite-stable conditions by using carbonate free single-crystal substrates with a threefold axis oriented normal to the surface.
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。
Enhanced Inhibition of Zinc Corrosion in Alkaline Solutions Containing Carboxylic Acid Modified PEG
The electrochemical behavior of zinc metal in a strong alkaline ( KOH) solution in the presence of , dicarboxylic acid modified poly(ethylene glycol) (PEG) was studied. Electrochemical methods (linear polarizations and potentiodynamic and potentiostatic techniques), spectroscopic (Fourier transform IR), morphological…
A Comparative Study of the Characteristics of Compact Yarn-Based Knitted Fabrics
compact spinning system was based on the conventional ring-spinning system. The vast majority of previous work deals with the properties of compact yarn in yarn form. In this study, we inspected fabric samples knitted from compact spun yarn in comparison with fabric samples knitted from classic ring-spun yarn. Knitted…
Bundling up carbon nanotubes through wigner defects
Abstract: We show, using ab initio total energy density functional theory, that the so-called Wigner defects, an interstitial carbon atom right beside a vacancy, which are present in irradiated graphite, can also exist in bundles of carbon nanotubes. Due to the geometrical structure of a nanotube, however, this defect…
Ferrite losses of cores with square wave voltage and DC bias
Ferrite material properties may vary depending on the grade and manufacturer. Moreover, there are differences between batches and also the production process may change in time. The same material grade may have improved or reduced performance depending on the year of production. In loss critical applications it is goo…
Cryogenic Quenching of Steel Revisited
Subject to a continuing debate, cryogenic treatments of alloy steels have been claimed to significantly increase wear resistance and toughness through the interplay of three effects: completing martensitic transformation, promoting uniform precipitation of fine carbides and imparting residual stresses. This study reex…
Electrodeposition-Induced Highly Oriented Zinc Oxide Ordered Pore Arrays and Their Ultraviolet Emissions
Highly oriented ZnO ordered pore arrays (films) were electrochemically deposited on substrate based on colloidal monolayer template. Such oriented porous film has a preferential orientation along c -axis and shows strong and steady ultraviolet photoluminescence at room temperature, accompanied by a much weaker visible…
Novel Ti–O–Ti bonding species constructed in a metal-oxide cluster
The preparation and structural characterization of a novel Ti-O-Ti bonding complex constructed in the mono-lacunary alpha-Keggin polyoxometalate (POM), are described. The water-soluble, crystalline complex with a formula of K5H2[[{Ti(OH)(ox)}2(micro-O)](alpha-PW11O39)] x 13H2O 1 was prepared in 30.2% (0.60 g scale) yi…
Selective laser sintering of polyamide-rectorite composite
Selective laser sintering is used to prepare components from a kind of blended powder of polyamide 12 (PA12) and organically modified rectorite (OREC). The effects of OREC on the sintering parameters and mechanical properties of the sintered specimens are investigated. The results show that the laser power needed for…
On the new ferrimagnetic Sr3Fe2UO9 double perovskite with TC above room temperature: a neutron diffraction study
Sr3Fe2UO9 double perovskite has been prepared in polycrystalline form by a solid state reaction, in air. This material has been studied by X-ray diffraction (XRD), neutron powder diffraction (NPD) and magnetic measurements. At room temperature, the crystal structure is tetragonal, space group I4/m, with a = b = 5.6994…
High-spin to low-spin relaxation kinetics in the [Fe(TRIM)2]Cl2 complex
A quasi-quantitative photo-induced low-spin (LS)-->high-spin (HS) conversion of FeII ions has been observed in the [Fe(TRIM)2]Cl2 complex by irradiating the sample with blue light (488 nm) at 10 K. The time dependence of the HS-->LS relaxation has been studied between 10 K and 44 K by means of magnetic susceptibility…
Preparation of Directionally Solidified B<SUB>4</SUB>C–TiB<SUB>2</SUB>–SiC Ternary Eutectic Composites by a Floating Zone Method and Their Properties
Directionally solidified B4C–TiB2–SiC composites were prepared by a floating zone method using B4C, TiB2 and SiC as starting materials. The B4C–TiB2–SiC system was ternary eutectic whose eutectic composition was 51.2B4C–8.1TiB2–40.7SiC (mol%). The ternary eutectic composite showed a lamellar microstructure where B4C(1…
Kinetics of polycondensation reactions during self-assembly of mesostructured films studied by in situ infrared spectroscopy
In situ synchrotron FTIR experiments have been performed during evaporation-induced self-assembly (EISA) of mesoporous films and the role of silica polycondensation in obtaining highly organized mesostructures has been illuminated.
Ideal Suture Diameter is Critical for Consistent Middle Cerebral Artery Occlusion in Mice
OBJECTIVE: The use of transgenic and knockout mice has led to a need for a consistent model of mouse transient focal cerebral ischemia. In a great majority of the published mouse middle cerebral artery (MCA) occlusion studies, the methods indicated the type of intraluminal suture used without indicating the actual sut…
A simple method of growth and lithiation of Ba6Mn24O48 whiskers
Isothermal crystal growth from evaporating fluxes of alkaline chlorides allowed the reproducible, high yield synthesis of micron thick and millimetre long whiskers of two manganese-rich phases, BaMn8O16 hollandite and Ba6Mn24O48 manganite, with a tunnel crystal structure. The crystal morphology suggests that they grow…
Preparation and Magnetic Properties of Fe[sub 3]O[sub 4] Nanostructures Grown by Electrodeposition
We report the preparation and magnetic properties of magnetite Fe 3 O 4 nanostructures grown by electrodeposition in the form of ( i ) nanocrystalline film (200 nm thick) and ( ii ) nanocylinders (50 nm diam, 200 nm long) inside the pores of polycarbonate membranes. According to x-ray diffraction and magnetic measurem…
Global Cost of Corrosion—A Historical Review
Abstract This article analyzes the estimates of the cost of corrosion, made in various countries at various times. The data are extrapolated to a 2004 base and then projected to the global economy. The chronological order of the countries are the United States of America, the United Kingdom, Australia, Japan, Canada,…
ALL-SILICON TANDEM CELLS BASED ON "ARTIFICIAL" SEMICONDUCTOR SYNTHESISED USING SILICON QUANTUM DOTS IN A DIELECTRIC MATRIX
To reach its most competitive long-term position, photovoltaics must push towards ever-increasing energy conversion efficiency while retaining low areal production costs. The most developed approach for improving this efficiency beyond that of a standard cell is to use a tandem stack of cells, with each cell in the st…
Atomic scale modelling of the cores of dislocations in complex materials part 1: methodology
Dislocations influence many properties of crystalline solids, including plastic deformation, growth and dissolution, diffusion and the formation of polytypes. Some of these processes can be described using continuum methods but this approach fails when a description of the structure of the core is required. To progres…
Understanding complex surface‐enhanced Raman scattering, using quantum chemical calculations
Abstract Several key issues concerning surface‐enhanced Raman scattering (SERS) are discussed, especially the surface orientation of the adsorbate, the enhancement mechanism relevant in a particular experiment, and the dependence of SERS frequencies and intensities on the electrode potential. It is shown that ab initi…