Materials Literature
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We give evidence that particles interacting via the simple, radially symmetric square-shoulder potential can self-organise in highly complex, low-symmetry lattices, thereby forming clusters, columns, or lamellae; only at high pressure are compact, high-symmetry structures observed. Our search for these ordered equilib…
Metal release rates from stainless steel grade 316L were investigated in artificial lysosomal fluid (ALF), simulating a human inflammatory cell response. The main focus was placed on release rates of main alloying elements using graphite furnace atomic absorption spectroscopy, and changes in surface oxide composition…
The scope and limitations of microwave heating as a tool for insertion of Group 10 metals into meso-tetraphenyl-porphyrin, -porpholactone, and -2,3-dihydroxychlorin derivatives are discussed. In some cases it is possible to reduce reaction times dramatically while obtaining good yields of the metallated products while…
By narrowing the size distribution of the polymer acid template, polyaniline (PANI) that is subsequently template synthesized exhibits enhanced conductivity. We used poly(2-acrylamido-2-methyl-1-propanesulfonic acid), PAAMPSA, as the polymer acid and it was synthesized by both conventional free-radical polymerization…
We report on a generic approach for the preparation of ZnO loaded temperature sensitive hybrid microgels with structural hierarchy. The synthetic process involves controlled hydrolysis of Zn(CH3COO)2·2H2O salt in the presence of poly(N-vinylcaprolactam-co-acetoacetoxyethylmethacrylate) (PVCL-AAEM) microgel templates i…
We study near-IR two-photon absorption (2PA) spectra of nonsymmetric push−pull metal-free phthalocyanines, which are present in solution at room temperature as a mixture of two spectrally nonequivalent tautomers T1 and T2. Large 2PA cross sections, σ 2 = (1−3) × 10 3 GM, are obtained in the excitation wavelength regio…
A novel first-generation Ca2+ sensitive contrast agent, Gd-DOPTRA has been synthesized and characterized. The agent shows approximately 100% relaxivity enhancement upon addition of Ca2+. The agent is selective and sensitive to Ca2+ also in the presence of Mg2+ and Zn2+. The relaxivity studies carried out in physiologi…
Fabrication of smooth and flexible free-standing films with universal thickness and a highly ordered layer structure is described in this paper. N-Dodecylacrylamide polymer forms a well-defined monolayer on a water surface. The acrylamide polymer chains are strongly associated by hydrogen bonding of amide groups in th…
Zinc oxide nanowires, nanobelts, and nanoneedles were synthesized using the vapor‐liquid‐solid technique. Young′s modulus of the nanowires was measured by performing cantilever bending experiments on individual nanowires in situ inside a scanning electron microscope. The nanowires tested had diameters in the range of…
Efficient purification of hydrogen from high temperature mixed gas streams can potentially play a critical role in the large-scale production of hydrogen from gasification of coal or biomass. Dense metal membranes have many favorable properties for this kind of purification, but existing membranes based on crystalline…
Nanostructured thin film solid oxide fuel cells (SOFC) have been developed for reduced temperature operation, with high power density, and to be self reforming. A thin film electrolyte (1-2 microm thickness), e.g., yttria-stabilized zirconia (YSZ), is deposited on a nickel foil substrate. The electrolyte thin film is…
Using a diblock copolymer melt as a model system, we show that complex Langevin (CL) simulations constitute a practical method for sampling the complex weights in field theory models of polymeric fluids. Prior work has primarily focused on numerical methods for obtaining mean-field solutions—the deterministic limit of…
With decreasing of grain size in ferritic steels, Lüders elongation becomes larger while work-hardening is lowered, finally resulting in loss of uniform elongation. This drawback can be overcome by introducing the second phase like martensite or metastable austenite. The improvement of strength and uniform elongation…
29Si NMR data have been recorded for the apatite series La8+xSr2-x(SiO4)6O2+x/2 (0 < or = x < or = 1.0). For x = 0, a single NMR peak is observed at a chemical shift of approximately -77 ppm, while as the La : Sr ratio and hence interstitial oxygen content is increased, a second peak at a chemical shift of approximate…
The effect of the manufacturing parameters on the surface hardness and shrinkage of polyurethane integral skin foam products has been investigated. Three production parameters were examined in details with the Taguchi method of experimental design, and the connection between these factors and the surface hardness were…
Highly hydrophilic glass substrates when coated with films of carbon nano horns dispersed in the ubiquitous protein bovine serum albumin display hydrophobic characteristics. Incidentally both the materials used to create the final hydrophobic surface are known to be highly bio-compatible. The features observed are acc…
In the second part of a review the diagnoses of the newly described genera Psammothidium Bukhtiyarova et F.E. Round, Rossithidium Round et Bukhtiyarova, Planothidium Round et Bukhtiyarova, Lemnicola F.E. Round et Basson, Pauliella F.E. Round et Basson, Karayevia Round et Bukhtiyarova, Astartiella Witkowski, Lange-Bert…
Focused microwave irradiation (MI) and freeze drying (FD) techniques have been used to study the generation of layered double hydroxides prepared from MgO–Al2O3–H2O systems. Reactions were undertaken at temperatures of between 100 and 180 °C in order to study the formation of the 3R1 and 3R2 polytypes, respectively. M…
A variable emittance device, vacuum-deposited as a solid-state monolithic thin-film system, can function as an electrically-controlled dimmable mirror in the IR region with reflectance in the 10-90% range.
The effects of carbides on crack behaviors in high-vanadium high-speed steel and high-chromium cast iron rolls under cold rolling condition are studied by using scanning electron microscope and transmission electron microscope.Results show that the crack initiation and propagation depend on free-structure in carbide,c…