Materials Literature
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This article reports on a technique for patterning diamond nanogrit which utilizes commercial ink-jet printer technology. Diamond nanogrit as small as 50 nm has been successfully printed onto substrates of glass, silicon, copper, and fused quartz. The technique has been used to demonstrate a quick and simple means to…
Bei der Umsetzung von YCl3 und Li2SO4 in verschweißten Goldampullen erhält man farblose Einkristalle von Y2(SO4)3. Nach Auskunft der Röngenstrukturanalyse kristallisiert die Verbindung orthorhombisch (Pbcn, Z = 4, a = 1273,97(13), b = 916,76(9), c = 926,08(7) pm, Rall = 0,0274). Die Kristallstruktur wird von [YO6]-Okt…
Singlewall carbon nanotube (SWNT) suspensions have been shown to be good optical limiters mainly because of their nonlinear scattering properties. In this paper, we report on a pump-probe experiment coupled with emission measurements for SWNT's in two solvents (water and chloroform). Time-resolved probe transmission w…
The crystal structure and electrical properties were investigated for (001)- and (116)-oriented SrBi2Ta2O9 (SBT) thin films deposited on (100) SrTiO3 and (100)SrRuO3∥(100)SrTiO3 substrates, and (110) SrTiO3 and (110)SrRuO3∥(110)SrTiO3 substrates, respectively. Both oriented SBT films were epitaxially grown with high c…
Many hydroxy-(hydrated) Cu 2+ oxysalt minerals, particularly Cu 2+ sulfates, are based on structural units that are variants of the [ M ϕ 2 ] N sheets of edge-sharing octahedra, where M is an octahedrally coordinated cation (including vacancies) and ϕ is an anion. Where ϕ = O 2− ,OH,Cl,H 2 O, the sheet can be consider…
The fatigue and hysteresis behaviour of oil palm wood flour (OPWF) filled natural rubber composites was studied. The stress at any strain decreased with increasing OPWF loading in the composites. As the filler loading increased, the poor wetting of the OPWF by the rubber matrix gave rise to poor interfacial adhesion b…
A quantitative model of a Si/SiO2 superlattice (SL) is developed and applied to Raman and photoluminescence (PL) measurements. By analyzing the experimental reflection spectra of Si/SiO2 SLs on Si and Al substrates, we obtained optical parameters of amorphous Si layers with thickness below 4 nm. Both refractive index…
Abstract A novel, continuous process, solid‐state shear pulverization (S 3 P), efficiently mixes blends with different component viscosities. Melt mixing immiscible polymers or like polymers of different molecular weight often requires long processing times. With a batch, intensive melt mixer, a polyethylene (PE)/poly…
Surface modification can be achieved with polymer blends when one component of the system is more surface active than the others. Numerous factors affect the interfacial properties, including the type and concentration of polymers, the solvent, and the interface. Blends of polystyrene (PS) and poly(trifluorovinyl ethe…
A bis(oxazoline)copper complex is immobilized in a synthetic Laponite clay by cationic exchange in different conditions. The structure of the exchanged complex is studied by several spectroscopic methods, mainly EPR and EXAFS, and compared with the homogeneous precursors in both solid state and solution. The exchanged…
High-nuclearity lantthanide complexes, having unique structures and potentially important applications, have been prepared via limited hydrolysis of lanthanide ions controlled by α-amino acids as supporting ligands. These novel complexes, synthesized under physiological or higher-pH conditions, exist as lanthanide-hyd…
The search for the simplest structural class of organic molecules capable of gelling large amounts of organic liquids is reviewed with an emphasis on the approach taken by the authors. The properties of several of the gelators, as well as their gels with various organic liquids, are presented. Some challenges to futur…
The electrical performance of multilayer ceramic capacitors (MLCCs) with Ni inner electrodes, made from (Ba,Ca)(Ti,Zr,Mn)O 3 (BCTZM), is closely related to the calcination temperature and the A/B ratio of the powder. For materials showing A/B = 1.000, the lifetime, the breakdown voltage, and the RC increase with highe…
In recent years a number of imaging techniques to determine the optical properties of materials, either in reflection or in transmission, have been developed. Here the use of an imaging version of the so-called rotating-polarizer method in the study of phase transformations in crystals is demonstrated. This method cre…
A novel synthesis of octafluoro[2.2]paracyclophane (AF4), one that remarkably does not require the use of high dilution methodology, is presented. Using this unprecedented methodology, AF4 is produced in 60% yield in a reaction of Zn with 0.35 M p-bis(chlorodifluoromethyl)benzene in DMA at 100 degrees C. The process c…
Copper is classed as a transition metal both from its physico-chemical properties and its biochemical behavior. This review includes thirty formally copper(III) compounds where crystal structure has been determined. Coordination number four dominates with mostly a square-planar arrangement about the copper(III) atom.…
Within the mode-coupling theory (MCT) for the evolution of structural relaxation in glass-forming liquids, correlation functions and susceptibility spectra are calculated characterizing the rotational dynamics of a top-down symmetric dumbbell molecule, consisting of two fused hard spheres immersed in a hard-sphere sys…
The phase behavior of the supercritical (SC) CO 2 /styrene/poly(vinyl chloride) (PVC) system was studied at 40 °C in the pressure range from 80 to 160 bar. The styrene concentration in the fluid phase ranged from 0 to 0.4 mol/L. The mass uptakes of styrene in PVC films before and after depressurization were obtained.…
The crystal structure of [(C5H4BMe2)2Fe]-4,4′-bipyridine [2 · bipy]n has been determined by the method of simulated annealing from high resolution X-ray powder diffraction at room temperature. The compound is of interest, because it proves that highly ordered organometallic macromolecules can be formed in the solid st…
We investigate long-time translational and rotational self-diffusion of fluorocarbon tracer spheres (100 nm radius) in aqueous dispersions of silica host spheres (10 nm radius). Diffusion is measured as a function of ionic strength (0−10 mM NaCl) and for host-sphere volume fractions up to 37% using depolarized dynamic…