Materials Literature
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The size-dependent mechanical response of a simple model microstructure is investigated using continuum dislocation-based, Cosserat and strain-gradient models of crystal plasticity. The governing equations and closed-form analytical solutions for plastic slip and lattice rotation are directly compared. The microstruct…
Substitution of the hydrogen atoms in the 5- and 7-positions of the quinoline moiety by halogen atoms (Cl and Br) increases the near-infrared (NIR) photoluminescence intensity of the trivalent erbium ion by 30%.
Diffusion coefficient of 95Nb in α-iron has been determined in the temperature range between 823 and 1163 K by use of a serial sputter-microsectioning technique. The diffusion coefficient of niobium is about two times as large as the self-diffusion coefficient in α-iron. The temperature dependence of the diffusion coe…
This study focuses on the changes in the supermolecular structure of cellulose of natural fibres after the mercerisation process by sodium hydroxide. This process is the first step in the modification of the natural fibresi surface which is performed in order to remove waxes and fats, in consequence of which the fibre…
The magnetic field effect on heterogeneous photocatalytic degradation of benzene over Pt/TiO2 has been observed for the first time. The coupling effect between magnetic field and photo field influences the conversion of benzene and production of CO2 in different modes.
We investigated the creep strength of fine‐grained aggregates of single‐phase anorthite and diopside at temperatures ranging from 1253 to 1553 K at flow stress between 5 and 250 MPa and at 0.1 MPa pressure. Powders of crushed natural, iron‐bearing diopside and of pure anorthite and diopside glasses were hot pressed at…
A dibenzo-24-crown-8 derivative bearing two cholesterol groups is either insoluble in or precipitates from most organic solvents, but its pseudo-rotaxane complex with a diammonium guest acts as a good gelator of aromatic solvents.
In recent years, research and development of high-temperature structural materials for ultra-super critical pressure plant with increased energy efficiency have actively been in progress so as to solve global environmental pollution and resource exhaustion issues.Oxide-dispersed-strengthened (ODS) ferritic alloys prod…
Mesoporous materials containing bridged cyclam moieties inside the framework were prepared by using a neutral templating route. Quantitative formation of bridged CuII-cyclam complexes was obtained by the direct incorporation of CuCl2 inside the hybrid material, showing thus the complete accessibility of cyclam moietie…
Hydrogen peroxide is generally considered to be a green oxidant, as it is relatively non-toxic and breaks down in the environment to non-toxic by-products. However, the current method for production, the sequential hydrogenation and oxidation of an alkyl anthraquinone, is capital-intensive, produces significant volume…
The temperature dependent thermoelectric power (TEP) of boron- and nitrogen-doped multiwalled carbon nanotube mats has been measured showing that such dopants can be used to modify the majority conduction from p-type to n-type. The TEP of boron-doped nanotubes is positive, indicating hole-like carriers. In contrast, t…
Abstract Because of their many unique and desirable properties, engineering polymers have increasingly been applied in applications where impact behavior is of primary concern. In this paper, the impact behavior of a glassy polymer acrylonitrile‐butadiene‐styrene (ABS) and a semicrystalline polymer alloy of polycarbon…
Incorporation of photochromic molecules into polymer matrices is necessary for materials applications such as optical information processing. Several novel homopolymers were prepared from 1,2-bis(3-thienyl)cyclopentene derivatives using ring-opening metathesis polymerization techniques. Analysis by UV−vis absorption s…
Neutral aluminum oxide clusters are produced in a molecular beam by laser vaporization in a pulsed-nozzle cluster source. These clusters are ionized via (multi-) photon absorption from either an ultraviolet excimer laser or from a far-infrared free electron laser. Ultraviolet (multi-) photon ionization produces sparse…
The third-order nonlinear optical properties of a series of 15 unmetallated and metallated 1,4,8,11,15,18,22,25-octaalkylphthalocyanines have been investigated. The palladium-metallated compound is the strongest nonlinear absorber of the series, but, due to its comparatively high linear absorption coefficient, it exhi…
Macroporous titania materials functionalized with monovacant Keggin-type polyoxometalates (POMs) [Xn+W11O39](12−n)− (XW11; Xn+ = P5+, Si4+, Ge4+) were prepared by the sol–gel as well as the template technique. Lacunary XW11 clusters were incorporated into wall structures of macroporous titania, resulting in the format…
Abstract Ordered macroporous materials recently have attracted much attention. A method that utilizes the condensation of monodisperse water droplets on a polymer solution is proposed for the preparation of honeycomb microporous films. Our results show that it is a general method that can be used for patterning a wide…
This paper discusses the occurrence of siderite (FeCO3) on iron artifacts excavated from the waterlogged peat and gyttja sediment of the Danish Iron Age site Nydam Mose. Siderite was identified by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy with ene…
Pitting behavior in the presence of cathodic polarization was investigated using aluminum single crystals with surface orientations of (100), (110), and (111). The effects of the surface orientations on pit density, pit current density, and pit morphology were studied. In addition, the development of crystallographic…
Nanocrystalline cerium oxide films with grain sizes as small as 6 nm are deposited by anodic deposition. Cyclic voltammetry studies of a series of complexing ligands indicate that formation constants below and a solution pH between 7 and 10 are needed for film formation. A mechanism is proposed for the deposition of p…