Materials Literature
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The performance of many solid-state devices including emissive displays, optical sensors, integrated optical circuits, and light-emitting diodes can be improved by applying a transparent high refractive index coating (≥ 1.65) onto the light-emitting or light-sensing portion of the device. Ideally, the coating shoul…
Xylanases (1,4-beta-D-xylan xylanhydrolases; EC 3.2.1.8) hydrolyze the 1,4-beta-D-xylopyranosyl linkage of xylans. The detailed structural characterization of these enzymes is of interest for the elucidation of their catalytic mechanism and for their rational modification toward improved stability and specificity. An…
An air drawing model of polymers and a model of the air jet flow field in the melt blowing process are established. The flow field model is solved using the finite difference method. The numerical computation results of distributions of the air velocity and air temperature coincide with the experimental data. The air…
Plastic-bonded materials are composites consisting of grains of filler material embedded in a polymeric matrix. A micromechanics model is proposed for investigating the mechanical behaviour of plastic-bonded materials having two disparate grain sizes. A hybrid theory is proposed to handle some aspects of the bimodal g…
Abstract The particle scattering function P ( k ) is approximately evaluated for the Kratky–Porod wormlike chain with a circular cross section to examine the effect of chain diameter d on the scattering curve of k 2 P ( k ) versus k , the magnitude of the scattering vector, for stiff chains and also the applicability…
A novel high-throughput method was used to determine the effect of chain extender composition on the mechanical properties of segmented poly(urethane−urea)s. Combinatorial libraries with continuous gradients in chain extender composition (60 < φ < 160 mol % stoichiometry), cure temperature (70 < T < 110 °C), or both w…
The degradation of porous methyl silsesquioxane (MSQ) films (k=2.2) by plasma irradiation has been investigated using several kinds of gas chemistries, which are used for photoresist strip. The porous MSQ is easily degraded by O2 plasma ash process and the dielectric constant increases largely, even by using the condi…
Hydrothermal reaction of H(3)PO(3), CH(3)NH(2), zinc(II) acetate, 4,4'-bipyridine (bipy), and (NH(4))(6)Mo(7)O(24).4H(2)O at 180 degrees C led to a novel organic-inorganic layered hybrid, [CH(3)NH(3)][H(2)bipy][Zn(4)(bipy)(3)(H(2)O)(2)Mo(V)(8)Mo(VI)O(36)(PO(4))].4H(2)O (1). Its structure was established by single-crys…
Uniform donut-like assemblies of YBO 3:Eu 3+ were obtained via a simple hydrothermal method, in the absence of any surfactant or template. These microparticles were actually composed of orderly aggregated nanosheets and exhibited improved chromaticity compared with the bulk. After controlled postcalcination, the micro…
Reiche Ernte: Mithilfe eines Organogel-Mediums wurde ein lichtsammelndes System für sichtbares Licht hergestellt (siehe Bild; Einschub: verschiedene Gelmischungen). Durch Mischen von vier unterschiedlichen Perylen-Derivaten in der Gelphase wird ein Energiegradient in den Gelfibrillen erzeugt. Die Nanofasern sammeln di…
By manipulating the crystallization conditions of C-methyl recorcinarene, a motif of self-assembled helical nanotubes held together by extensive π⋅⋅⋅π interactions is obtained. The tube, depicted (red=O, white=H, gray=C), has an exo-functionalized hydrophilic outer surface capable of complex formation with cationic or…
To identify the nature and the local structure of the surface of supported catalyst nanoparticles, we have performed a detailed comparative study of CO adsorption on two categories of oxide-supported Palladium catalysts: (1) polycrystalline MgO and γ-Al 2 O 3 supported Pd metal catalysts prepared by impregnation techn…
The structure of ${\mathrm{V}}_{2}{\mathrm{O}}_{5}$ nanotubes has been experimentally determined. The approach of the atomic pair distribution function technique was employed because of the limited structural coherence in this nanophase material. It has been found that even a nanocrystal with the complex morphology of…
Theory of the remote Coulomb impurity scattering in single--wall carbon nanotubes is developed within one--electron approximation. Boltzmann equation is solved within drift--diffusion model to obtain the tube conductivity. The conductivity depends on the type of the nanotube bandstructure (metal or semiconductor) and…
In protein crystallization, screening is initially performed to obtain an indication of the conditions under which a macromolecule might crystallize. These preliminary conditions are then optimized to produce (in a perfect world) well diffracting crystals; this process of optimization often involves fine grid screenin…
PURPOSE: Calotropis gigantea R. Br. (Asclepiadaceae) a wildly growing plant has been reported to possess number of medicinal properties and other purposes. The purpose of the present study was to evaluate scientifically the anti-diarrheal effects of C. gigantea used traditionally in Indian system of medicine using cas…
The hydrothermally synthesized 1D homochiral nickel aspartate oxide [Ni2O(l-Asp)(H2O)2].4H2O is based on infinite helical chains of edge- and corner-sharing nickel octahedra. It represents the first example of a chiral one-dimensional compound with an extended helical TM-O-TM subnetwork synthesized as an optically pur…
Since publication of the main contributions on the theory of kinetic roughening more than fifteen years ago, many works have been reported on surface growth or erosion that employ the framework of dynamic scaling. This interest was mainly due to the predicted existence of just a few universality classes to describe th…
It is well known that the physical properties of some transition-metal compounds (mostly oxides) are strongly affected by intra-atomic correlations. Very recently, investigations of the adsorption of small molecules such as CO on the surfaces of transition-metal oxides have led to rather surprising results: the weak a…
Before molecular imaging with MRI can be applied clinically, certain problems, such as the potential sparseness of molecular epitopes on targeted cell surfaces, and the relative weakness of conventional targeted MR contrast agents, must be overcome. Accordingly, the conditions for diagnostic conspicuity that apply to…