Materials Literature
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Morphology of a novel semiorganic nonlinear optical crystal, l -arginine trifluoroacetate ( + (NH 2 CNH(CH 2 ) 3 CH(NH 3 + )COO − ·CF 3 COO − ) has been indexed. The crystal has nine developed facets with major ones (1̅ 01) (1̅ 00) and (001). The dielectric constant and dielectric loss were recorded both as function o…
Ion irradiation of ${\text{Fe}}_{60}{\text{Al}}_{40}$ alloys results in the phase transformation from the paramagnetic, chemically ordered B2 phase to the ferromagnetic, chemically disordered A2 phase. The magnetic phase transformation is related to the number of displacements per atom (dpa) during the irradiation. Fo…
Abstract Diethylenetriaminepentatakis(methylene phosphonic acid) (DTPMP) is commonly used in oilfield for scale inhibition. In this study, Ca-DTPMP submicron-sized particles were prepared directly by chemical precipitation with the assistance of phosphino-polycarboxylic acid (PPCA). The influences of adsorbed PPCA, KC…
A copper-rich cereal: Superhydrophobic copper particles show a very large Cheerios effect and rapidly self-assemble into robust sheets on the surface of water. These sheets can support objects (including water drops, see photo) placed on them, even though the irregular geometry of the particles means that they contain…
The development of a tool called the Service Load Factor (SLF) for railway tapered roller bearings using residual stress and retained austenite data is presented. Case-carburized tapered roller bearings used in the railroad industry are manufactured with a dual-phase microstructure that consists primarily of tempered…
A novel modified nano-calcium carbonate (R-CCR) was prepared by coating a layer of organic compound with three functional groups (–OH, –COOH and C=C) on the surface of CCR (a commercial nano-CaCO3 modified with stearic acid) powders in solid state. Fourier transform infrared spectrometer (FTIR) indicated that the modi…
Abstract Injection of inhibitors for gas hydrate formation during transportation of wet gas/condensate in pipelines strongly affects the tolerance for produced formation water. The use of monoethylene glycol (MEG) as hydrate inhibitor can be combined with pH increase (pH stabilisation) as corrosion control for carbon…
A multicomponent and multiphase model with fluid motion is developed. The model is used to study reactive wetting in the case where concentration change of the spreading liquid and the substrate occurs. With the introduction of a Gibbs energy functional, the governing equations are derived, consisting of convective co…
Mesoporous silica nanospheres (MPNSs) were synthesized by the sol-gel method and were investigated by X-ray diffraction, nitrogen sorption, and transmission electron microscopy. The analyses showed that the MPNSs were highly dispersed, with a diameter range of 50-250 nm. Further, the polycation poly(allylamine hydroch…
Structural changes during tensile stretching deformation for pure polypropylene (PP) specimen and PP/ZnO specimens with different content of ZnO nanoparticles have been investigated by small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) techniques. For pure PP specimen, there is a large amount o…
A model based upon excluded volume considerations is presented for the connectedness percolation thresholds in polydisperse systems of cylindrical rod-like nanoparticles. The dependence of the percolation threshold upon polydispersity index and number-averaged aspect ratio is examined for two different distribution fu…
The electronic and magnetic properties of oxidized zigzag and armchair graphene nanoribbons, with hydrogen passivated edges, have been investigated from ab initio pseudopotential calculations within the density functional scheme. The oxygen molecule in its triplet state is adsorbed most stably at the edge of a zigzag…
We report the results of charge transport studies on single CdTe nanocrystals contacted via evaporated Pd electrodes. Device charging energy, E c, monitored as a function of electrode separation drops suddenly at separations below approximately 55 nm. This drop can be explained by chemical changes induced by the metal…
Schutzüberzug: Glycodendrimere können als homogene bioaktive Beschichtungen genutzt werden, um die Zytotoxizität von einwandigen Kohlenstoffnanoröhren (SWNTs) abzuschwächen. Die bifunktionellen Glycodendrimere (siehe Bild) weisen periphere Kohlenhydrateinheiten und eine Pyren-Endgruppe auf, die über π-π-Wechselwirkung…
Chalcopyrite CuInS 2 is an important photovoltaic material. CuInS 2 hollow nanospheres with diameters of 80−100 nm have been synthesized by a surfactant-assisted solution-chemical route. Structural characterization indicated that shells of the hollow spheres are composed of CuInS 2 nanoparticles of about 10 nm in size…
Abstract Alkyl pyridinium, 1‐vinyl alkyl imidazolium, 1,3‐dialkyl imidazolium, and tetraalkyl phosphonium bromides were successfully used as intercalants for the preparation of highly thermally stable organophilic montmorillonites. Nanocomposites of linear low density polyethylene (LLDPE) and linear low density polyet…
X-ray and neutron fiber diffraction has been used to study cellulose as it is converted from its naturally occurring crystal phase, cellulose I, to an activated crystal phase, cellulose III I , by ammonia treatment. The detailed crystal structures determined for cellulose I β , an intermediate ammonia-cellulose I comp…
We present a novel multifunctional magnetic Ag nanoshell with sandwichlike nanostructure, which is composed of a yolk−egg-like magnetic silica core and a continuous Ag nanoshell coating. First, yolk−egg-like magnetic silica was prepared by a facile one-step sol−gel method to embed the magnetic nanoparticles at the bou…
Pure and o -nitroaniline (O-NA) doped benzil single crystals were grown by the slow cooling solution growth method. The doping of O-NA is associated with the strong interaction between the guest and host molecules by the hydrogen bonding. Incorporation of O-NA in the lattice enhances the crystallinity. The nonlinearit…
Starker Ring: Der Cyclohexamer-Templat-Komplex 3, der durch templatgestützte Trimerisierung des Porphyrindimers 2 mit dem Hexapyridyltemplat 1 erhalten wurde, ist enorm stabil (Kf=7×1038 M−1). Dennoch kann der freie Makrocyclus 4 mithilfe von Aminliganden freigesetzt werden. Nach spektroskopischen Befunden und DFT-Rec…