Materials Literature
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A series of bimetallic, trigonal bipyramidal clusters of type {[Co(N-N)(2)](3)[Fe(CN)(6)](2)} are reported. The reaction of {Co(tmphen)(2)}(2+) with [Fe(CN)(6)](3)(-) in MeCN affords {[Co(tmphen)(2)](3)[Fe(CN)(6)](2)} (1). The cluster can exist in three different solid-state phases: a red crystalline phase, a blue sol…
Nanosize effect of ZrO2 in Au/ZrO2 catalyst was studied by deposition-precipitation of Au nanoparticles in similar sizes (4-5 nm) on ZrO2 nanoparticles of varying sizes. The catalysts were characterized with XRD, TEM, XPS, and nitrogen adsorption to understand the effect of ZrO2 particle size on the catalytic nanostru…
The mechanisms for silicon (Si) defect and nanocrystal related white and near-infrared electroluminescences (ELs) of Si-rich SiO2 films synthesized by Si-ion implantation and plasma-enhanced chemical-vapor deposition (PECVD) are investigated. The strong photoluminescence (PL) of Si-ion-implanted SiO2 (SiO2:Si+) at 415…
Drop sizes and drop size distributions were determined by means of an optical shear cell in combination with an optical microscope for the systems polyisobutylene/poly(dimethylsiloxane) (I) and poly(dimethyl-co-methylphenylsiloxane)/poly(dimethylsiloxane) (II) at low concentrations of the suspended phases and at diffe…
We introduce the notion of electronic enthalpy for first-principles structural and dynamical calculations of finite systems under pressure. An external pressure field is allowed to act directly on the electronic structure of the system studied via the ground-state minimization of the functional $E+PV_{q}$, where $V_{q…
Magnetotransport properties in a nanocrystalline La$_{0.67}$Sr$_{0.33}$MnO$_{3}$/micron sized Al$_{2}$O$_{3}$ granular composite with different concentrations of Al$_{2}$O$_{3}$ have been studied. The resistivity curves in absence of magnetic field and the various transport mechanisms which might account for the uptur…
Electrospinning offers an avenue to produce small diameter tubes made out of nanofibres. However, to date, most tubes from electrospun fibres have been either random fibres or from sheets that were rolled into tubes. Although there have been suggestions of getting tubes made of circumferentially aligned fibres, this i…
Hydrogen storage properties of mutiwalled carbon nanotubes (MWCNTs) with Ni nanoparticles were investigated. The metal nanoparticles were dispersed on MWCNTs surfaces using an incipient wetness impregnation procedure. Ni catalysts have been known to effectively dissociate hydrogen molecules in gas phase, providing ato…
The guanosine hydrazide 1 yields a stable supramolecular hydrogel based on the formation of a guanine quartet (G-quartet) in presence of metal cations. The effect of various parameters (concentration, nature of metal ion, and temperature) on the properties of this gel has been studied. Proton NMR spectroscopy is shown…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdvances in Homogeneous and Heterogeneous Catalytic Asymmetric EpoxidationQ.-H. Xia, H.-Q. Ge, C.-P. Ye, Z.-M. Liu, and K.-X. SuView Author Information Laboratory for Advanced Materials and New Catalysis, School of Chemistry and Materials Science, Hubei University, Wuhan 430…
The existing experimental evidence suggests that exposure of a composite material to the electromagnetic field leads to changes in the material’s strength and resistance to delamination. In this work, the mechanical response of transversely isotropic graphite/epoxy composite plates in the presence of an electromagneti…
Abstract KLa[C(CN) 3 ] 4 ·H 2 O was crystallized from an aqueous solution containing La(NO 3 ) 3 ·6H 2 O and K[C(CN) 3 ]. The crystal structure was solved and refined from X‐ray single crystal data (P4/n, Z = 2, a = b = 12.379(1) Å, c = 6.5695(8) Å, V = 1006.7(2) Å 3 ). Solid KLa[C(CN) 3 ] 4 ·H 2 O forms a framework s…
Abstract Coarse‐grained chains can be designed so that they successfully capture subtle effects arising from the local covalent structure of real chains. Constraining the conformations of the coarse‐grained chains with an appropriate rotational isomeric state model can achieve this objective. This claim has been docum…
*† A state of the art impact facility has been developed to study the ignition of polymer matrix composites in liquid oxygen. The facility utilizes several advanced data acquisition techniques including the novel flash sensor presented in this paper. The flash sensor is synchronized with the force signal to reveal exa…
Abstract Kernite Na 2 B 4 O 6 (OH) 2 ·3H 2 O dehydration in air at high temperature and in vacuum at room temperature has been studied. It was found that kernite easily dehydrates forming a new phase‐I both on heating and in vacuum. The chemical formula Na 2 B 4 O 6 (OH) 2 ·1.5H 2 O of the new phase‐I has been estimat…
Abstract Li 2 TeS 3 and Li 2 TeSe 3 were synthesized by the reaction of stoichiometric amounts of Li, Te and Q (Q = S, Se) in the ratio 2 : 1 : 3. Both products are extremely air and moisture sensitive. The crystal structures were determined by single crystal X‐ray diffraction at room temperature. Red Li 2 TeS 3 and m…
CDR Critical Design Review M&PT Material and Process Technology CFD Computational Fluid Dynamic NASA National Aeronautics and Space Adminis tration CFRP Carbon Fiber Reinforced Plastic NDI Nondestructive Inspection CIPR Critical Integrated Product Review ODA Organization Designation Authorization DPA Digital Preassemb…
A nano-precusor which can, in-situ, produce nano-SiO 2 under particular triggering condition was introduced into leather to improve the hydrothermal stability. In order to elucidate the reaction of nano-SiO 2 with proteinand how it influences the properties of the protein, collagen was used as a model in a detailed in…
Abstract Summary: The risk parameters of the high‐solids‐content emulsion copolymerization of vinyl acetate/butyl acrylate/acrylic acid (78.5/18.5/3 wt.‐%) were studied. The effect of the polymer/monomer ratio, the total solids content, the initiator/monomer ratio, the non‐swollen polymer particle size, and the proces…
Abstract Synthesis and Crystal Structures of PrSe 2 and NdSe 2 Crystals of PrSe 2 and NdSe 2 can be made by chemical transport reactions starting from pre‐annealed powders (800 – 600 °C, 2 weeks, I 2 as transport agent). Both compounds adopt the CeSe 2 ‐type structure. They crystallize in the monoclinic space group P…