Materials Literature
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The controlled growth of three types of carbon nanostructures (tubes, caterpillar-like fibers and interwoven spheres) was successfully achieved via the catalytic chemical vapor deposition of acetylene, using an effective, silicon supported catalyst derived from a Co–Al layered double hydroxide precursor. The materials…
We report a facile strategy to tether lanthanide complexes to organic–inorganic hybrid titania materials via sol–gel processing by employing chemically modified titanium alkoxide as the precursor where the organic ligand sensitizing the luminescence of lanthanide ions is bonded to titanium.
PURPOSE: The paper reports on progress in physics of radiationless transitions and new Auger spectra of (125)I and (124)I. We report progress in Monte Carlo track structure simulation of low energy electrons comprising majority electrons released in decay most Auger emitters. MATERIALS AND METHODS: The input data for…
Improvement of Grain-Boundary Conductivity of Trivalent Cation-Doped Barium Zirconate Sintered at 1600°C by Co-doping Scandium and Yttrium, Imashuku, S., Uda, T., Nose, Y., Kishida, K., Harada, S., Inui, H., Awakura, Y.
X-Shaped ternary five-block molecules, composed of a rigid p-terphenyl core, two terminal glycerol groups and two flexible n-alkyl or semiperfluorinated chains fixed laterally to opposite sides of the terphenyl moiety, form liquid crystalline phases built up of honeycomb-like arrays of polygonal cylinders, where the r…
Co@Pt-Au nanoparticles, which have enhanced magnetism and high stability in aqueous media, are utilized in conjunction with MRI to monitor the structural evolution of Abeta assemblies, especially Abeta protofibrils in the early reversible stages.
We describe a new method for the preparation of fluorescent inorganic-nanoparticle composite microgels. Copolymer microgels with functional pendant groups were transferred viadialysis into tetrahydrofuran (THF) solution and mixed with colloidal solutions of semiconductor nanocrystals (quantum dots, QDs). CdSe QDs stab…
Determination of the material parameters is one of the key challenges of numerical fire simulation attempting to predict, rather than prescribe the heat release rate. In this work, we use common fire simulation software and genetic algorithms to estimate the kinetic reaction parameters for wood components, birch wood,…
AZ31 and AZ61 Mg alloys were multi directionally forged (MDFed) during decreasing temperature from 623 K to 423 K to cumulative strain of ΣΔε=4.8 by Δε=0.8 pass strain at a strain rate of 3×10−3 s−1. In both Mg alloys, the average grain size gradually decreased with increasing cumulative strain. After straining to ΣΔε…
Here, for the first time, we present a new approach to produce peptide nanoparticles, which involves controlling the self-assembly process with an enzymatic trigger and confining it within nanoscale reverse micelles.
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…