Materials Literature
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Luck and skill were both needed to find out that tetraaryl[32]heptaphyrin(1.1.1.1.1.1.1) and its fourfold-fused derivative stabilize divalent copper in an unprecedented T-shaped geometry of the coordinating environment (see picture; Cu red, F blue, N light gray, C dark gray).
Abstract In section 1.5 we gave a descriptive account of the space groups and their labels and we introduced the Seitz notation for the symmetry operations that constitute the space group. In the present chapter we shall be concerned with the details of the identification of the 230 space groups, with the construction…
In this paper, we determine the spectrum and density of states of a graphene quantum dot in a normal quantizing magnetic field. To accomplish this, we employ the retarded Green function for a magnetized, infinite-sheet graphene layer to describe the dynamics of a tightly confined graphene quantum dot subject to Landau…
Hoodia gordonii, an appetite suppressant, is used extensively as a botanical dietary supplement. Microscopy and molecular genetic procedures are provided for identification and differentiation between H. gordonii, Opuntia ficus indica, and other related Hoodia species.
Abstract Polyaniline doped with dodecylbenzene sulfonic acid and conductive carbon black (PAn.DBSA/CB) hybrid materials have been prepared by in situ polymerization. The electrical resistivity of the PAn/CB was measured as a function of CB. The minimum resistivity was noticed for the composites with 25 wt % of CB as c…
It is shown that the superconductivity in Ce 1− x Gd x FeAsO 0.84 F 0.16 compounds can be modulated by internal (chemical) pressure. The internal pressure is induced by Gd substitution for Ce in CeFeAsO 0.84 F 0.16 , which compresses the crystal lattice. The temperature dependences of resistivity and magnetization sho…
Abstract Films of blended poly(acrylonitrile‐butadiene‐styrene) (ABS) and polyaniline (PANI) were produced by codissolving both components in a common organic solvent, which was then evaporated. The influence of the preparation conditions on the properties of the blends was analyzed by factorial design. The factors ev…
This paper assesses a potentially interesting soil process, dealumination, as the mechanism for the increase observed in strong acid recoverable Al and associated elements in farmed soils compared with background soils in the Waikato Region of New Zealand. Waikato Regional Council has been measuring an established set…
Layered-silicate nanoparticles offer a cost-effective reinforcement for thermoplastics. Computational modelling has been employed to study large deformations in layered-silicate/poly(ethylene terephthalate) (PET) nanocomposites near the glass transition, as would be experienced during industrial forming processes such…
ZnO is probably the most studied material deposited as films by aqueous solution methods. Both neutral and alkaline solutions are commonly used, and deposition is often carried out in glass vessels. We show that for depositions carried out under alkaline conditions, slow dissolution of the glass by the solution often…
Abstract In this study, the effect of the dopant structure on the morphology, structure, optical absorption, conductivity, and thermal properties of conductive polyaniline (PAn)/silica (SiO 2 ) hybrids from a sol–gel process was first investigated. Camphorsulfonic acid (CSA) and dodecylbenzylsulfonic acid (DBSA) were…
The reaction of H 2 Re 2 (CO) 8 ( 1 ) with Cp*Rh(CO) 2 ( 2 ) in refluxing hexane affords the mixed-metal clusters H 2 RhRe 2 Cp*(CO) 9 ( 4, major product), HRh 2 ReCp* 2 (CO) 6 ( 5 ), and HRhRe 3 Cp*(CO) 14 ( 6 ). 4 and 5 are electron-precise 48e clusters and display triangular metallic cores, while 6 contains 64 vale…
Abstract The preparation and characterization of electrospun polyacrylonitrile (PAN)/platinum(II) acetylacetonate composite nanofibers were investigated. The solution properties, such as viscosity, surface tension, and conductivity, of Pt‐acetylacetonate‐added PAN solutions in N,N ‐dimethylformamide were measured, and…
Single-crystal neutron diffraction analysis of an l -alanine pseudo single crystal (PSC, a composite in which microcrystals are aligned three-dimensionally) prepared from its powder is presented. Microcrystals of l -alanine were suspended in an ultraviolet-curable resin precursor and subjected to three-dimensional mag…
The optical properties of zinc oxide nanowires are critically influenced by the growth process. Herein, we describe a metal-organic chemical vapour deposition (MOCVD) process for the growth of ZnO nanowires with improved optical properties. A tetrahydrofuran adduct is used to control the reactivity of dimethylzinc to…
We have applied density-functional theory based ab initio molecular dynamics to examine ${\text{Li}}_{4}{\text{BN}}_{3}{\text{H}}_{10}$ at temperatures both above and below the experimental melting point. We examine the structure of the liquid, diffusivity, vibrational spectra and compare to both experimental data and…
We report synthesis, structural details, and magnetization of SmFe1-xCoxAsO with x ranging from 0.0 to 0.30. It is found that Co substitutes fully at Fe site in SmFeAsO in an isostructural lattice with slightly compressed cell. The parent compound exhibited known as the spin density wave (SDW) character is below at ar…
Abstract Formation of detectable intermediate aggregates is found to affect the morphologies of PANI nanomaterials, leading to either tubular or rod structures with striated growth and rough surfaces. By simply varying the ratio of initial proton and aniline concentration, a wide range of product morphologies can be s…
The new magnesium (II) based oximato complex tris(aquo)-bis[2-(methoxyimino)-propanoato]magnesium(II) (1) has been prepared and fully characterised. This oximato complex serves as an ideal molecular single source precursor for chemical solution deposition and formation of cubic nanoscaled MgO from which thin films (2D…
The x BiMnO 3 −(1 − x ) PbTiO 3 solid solution has been synthesized by an accurate, nonclassical, wet-chemistry method. Results show the existence of two structurally different perovskites, depending on the x value: tetragonal for 0≤ x <0.36; pseudocubic for 0.44< x ≤0.8; and a morphotropic phase boundary (MPB) betwee…