Materials Literature
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The mono-terminal hydroxyl groups of polybutadiene of varying chain length were studied as sites for initiation of lactone ring-opening polymerization by lipase catalysis. Novozyme-435 (immobilized Candida antarctica lipase B) was an effective catalyst for this acylation. Monohydroxyl-terminated polybutadiene with M n…
${\mathrm{PrTiFe}}_{11\ensuremath{-}x}{\mathrm{Co}}_{x}$ alloys $(x<~3)$ prepared by melting and subsequent annealing have been investigated with their carbides ${\mathrm{PrTiFe}}_{11\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{C}}_{y}$ $(y=1)$ synthesized by means of reaction with solid hydrocarbon at 750 K. X-ray di…
We describe a first passage time Markov chain analysis of rare events in kinetic Monte Carlo (kMC) simulations and demonstrate how this analysis may be used to enhance kMC simulations of dislocation glide. Dislocation glide is described by the kink mechanism, which involves double kink nucleation, kink migration and k…
Two 1D bi-bridging Cu(II) chains, catena-oxalate-bis[1-(2-aminoethyl)pyrrolidine-copper(II)]-0.5(squarate) perchlorate hydrate (1) and catena-pyrazine-oxalate-tetraaquo-dicopper(II) diperchlorate (2) have been synthesised and their molecular structures determined by X-ray crystallography. Compound 1 exhibits a polymer…
Abstract 60 Co‐gamma‐radiation and ceric ammonium nitrate (CAN) redox‐induced graft polymerization of acrylic monomers (acrylonitrile, acrylic acid, and methyl acrylate) to starch was performed to produce drug‐delivery systems. The grafted starches obtained mainly by redox‐induced polymerization were characterized by…
We have investigated the spontaneous formation of the regular quadrilateral defect array in cholesteric emulsions, composed of water, surfactants, and cholesteric liquid crystals. Both at the substrate surface and at the surfactant-coated droplet surface, a homeotropic anchoring is enforced to the adjacent liquid crys…
In this work, aniline was polymerized directly to polyaniline sulfate salt without using protic acid. Polyaniline sulfate salt was prepared by an emulsion polymerization pathway using surfactants such as anionic surfactant (sodium lauryl sulfate), cationic surfactant (cetyltrimethylammonium bromide) and non-ionic surf…
New CoO−SiO 2 -sol pillared montmorillonite (Co−SiM) is synthesized by interlamellar hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in the presence of Co 2+ ion via an alkylammonium intercalated montmorillonite. The silicate layers of Na + −montmorillonite are expanded in advance with hexadecyltrimethy…
at973 K for 2 h prior to each catalytic measurement. Effluentgases from the reactor were analyzed by a gas chromato-graph (Chrompack CP9001) equipped with a thermal con-ductivity detector (TCD). GC column used in this study wasa Fused Silica capillary column (CarboPLOT P7). The BETspecific surface areas were measured…
We prepared the polyaniline (Pani) film and powder by chemical polymerization and doping with different dopants and also investigated the capability of Li//polyaniline cells after assembling. The oxidation/reduction potentials and electrochemical reaction of Li//polyaniline cells were tested by cyclic voltammetry tech…
Following Guo, G.-J., and Zhang, Y.-G., 2001, Molec. Phys., 99, 283, which calculates the bulk and shear viscosities of SPC/E water at 30°C and 0.999 g cm−3, further molecular dynamics simulations have been performed at state points of 0°C, −20°C, −40°C, and −60°C along an approximate isobar with the previous state po…
The deposition of charge-stabilized colloidal gold nanocrystals on silicon substrates, derivatized with (aminopropyl)triethoxysilane (APTES), is studied using atomic force microscopy. The influence of ionic strength on the spatial distribution of gold nanocrystal assemblies is analyzed in terms of radial distribution…
Single-crystalline nanoribbons were used as substrates for the epitaxial growth of different functional thin films deposited by laser ablation techniques. This simple method yields highly crystalline bilayer nanotapes with sharp structural and compositional interfaces. As an example, Co 0.05 Ti 0.95 O 2 @SnO 2 nanotap…
Epitaxial ${\mathrm{C}\mathrm{u}}_{2}\mathrm{O}$ islands on a Cu(100) surface formed through oxidizing Cu(100) films at 600 \ifmmode^\circ\else\textdegree\fi{}C in an ultrahigh vacuum transmission electron microscope were observed to undergo a shape transition from initially square shaped islands to elongated islands…
A combination of static and dynamic laser light-scattering techniques was employed to study the supramolecular structures of polyoxomolybdate-based giant molecules in aqueous solution. Convincing evidences indicate that the spherical aggregates have unique vesicle-like structures. A model is built up based on solid ex…
Planned nanopatterns of [Au 55 (Ph 2 PC 6 H 4 SO 3 Na) 12 Cl 6 ] clusters are generated on smooth silicon surfaces using a “bottom-up” fabrication methodology based on the selective self-assembly of the gold clusters on purpose-designed organic template patterns themselves fabricated via a hierarchical layer-by-layer…
A reinvestigation of the O-terminated, polar surface of zinc oxide, O-ZnO(0001\ifmmode\bar\else\textasciimacron\fi{}), using scattering of thermal energy He atoms reveals the presence of a (1\ifmmode\times\else\texttimes\fi{}3) reconstruction for the clean surface. This finding is at variance with the results of previ…
Oxidised, multi-walled, carbon nanotubes can be grafted with polystyrene molecules using an situ radical polymerisation reaction, thereby dramatically modifying their solubility and their suitability for nanocomposite applications.
Two anhydrous crystal structures of fully dehydrated Cd2+ - and Cs+ -exchanged zeolite X, Cd32Cs28Si100Al92O384 (Cd32Cs28-X: a = 24.828(11) <TEX>$\AA)$</TEX> and fully dehydrated Cd,sup>2+ - and Rb+ -exchanged zeolite X, Cd28Rb36Si100Al92O384 (Cd28Rb36-X: a = 24.794(2) <TEX>$\AA$</TEX>), have been determined by single…
Abstract Gelatin/montmorillonite (MMT) hybrid nanocomposite was directly prepared with unmodified MMT and gelatin aqueous solution. Thermal and mechanical properties of the composite were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and…