Materials Literature
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Using a thin-film composition spread technique, we have mapped the phase diagram of the Ni-Mn-Al ternary system in search of ferromagnetic shape-memory alloys (FMSA). A characterization technique that allows detection of martensitic transitions by visual inspection using micromachined cantilever arrays was combined wi…
Abstract A series of highly soluble [tetrakis(2,4‐dimethyl‐3‐pentyloxy)phthalocyaninato]metal complexes [MPc(OC 7 H 15 ) 4 ] (M = Zn, Pd, Co) were prepared by cyclic tetramerization of 3‐(2,4‐dimethyl‐3‐pentyloxy)phthalonitrile ( 2 ) in the presence of the corresponding metal salts and 1,8‐diazabicyclo[5.4.0]undec‐7‐e…
A fourth polymorph of the 4-chloro-1,2,3,5-dithiadiazolyl radical, ClCNSSN is reported. It crystallises as twisted cofacial dimers in the triclinic space group P-1 with four molecules in the asymmetric unit. Whilst the structure exhibits three-centre SSδ+⋯Nδ− motifs similar to those previously observed in the α, β and…
On the basis of IR spectroscopy studies it is concluded that the redox couples Co(2+)/Co(+) and Ni(2+)/Ni(+) operate in the selective catalytic reduction of nitrogen oxides with hydrocarbons over Co-ZSM-5 and Ni-ZSM-5.
In recent years, a series of multi-element doped graphite materials has been developed for PFC (plasma facing components) in China. Detailed investigation of the composition and full characterization of the microstructure of the doped graphite were carried out in the last several years and are now still in progress. T…
Boron nitride (BN) nanohorns were synthesized by an arc-melting method, and atomic structure models for BN nanohorns with tetragonal BN rings were proposed from high-resolution electron microscopy. Stability and electronic structures of the BN nanohorns were investigated by molecular orbital/mechanics calculations. Th…
A new method for the synthesis of pillared clays using supercritical carbon dioxide (scCO2) has been developed. This scheme consists of two steps: (1) the hydrophobitization of the clay interlayer space, using an organic ion exchange method with interlayer cations in aqueous solution, and (2) the intercalation of a me…
A low polarization dependent, high diffraction efficiency grating for wavelength demultiplexer is proposed, manufactured by standard crystallographic etching of Si surface. Light is incident and diffracted inside the wafer, which is covered with reflecting metal. Optimized groove form results in a flat spectral respon…
The preparation, structural characterization and magnetic properties of three solvent adducts of VOCl(2), trans-VOCl(2)(THF)(2)(H(2)O) (1), trans-VOCl(2)(H(2)O)(2).2Et(2)O (2) and cis-VOCl(2)(MeOH)(3) (3) are described. In these solids, hydrogen bonding among the inorganic complexes is the critical determinant of the…
In order to work out indispensable criteria for a promising process of innovation, a historical review is given for two paths of innovation, which the author was involved in as an chemist in electrical industry from the initial idea up to commercialization and application in the field of microelectronics and electroni…
The crystal structure of a new mixed-valence Cu(III)/Cu(I) compound containing the ligand pds2− (pds, pyrazine-2,3-diselenolate) shows a unique packing pattern with 2D layers formed by the coordination of the Cu(I) countercations to both the pyrazine N and Se atoms of the [CuIII(pds)2]− complex, with a distorted squar…
Recent developments in the understanding of order-disorder and displacive type transitions are presented. It is shown that classical order-disorder type transitions like those in squaric acid and KDP contain in addition to the order disorder also a displacive component in the phase transition mechanism. Similarly clas…
Statistical methods for the dimensioning and specification of insulators with respect to pollution have formed the subject of many studies. However, such methods are not in widespread use due to its perceived complexity. A simple method is introduced for the dimensioning and verification of insulators with respect to…
The relationship was explored between nanoscale voids in anodic aluminum oxide films and the surface condition of aluminum samples prior to anodizing. Transmission electron microscopy (TEM) detected voids on the order of 10 nm in anodic films. Atomic force microscopy (AFM) of these films, obtained after partial oxide…
A novel structural behavior of strontium aluminate synthesized by spray pyrolysis was found from the structural dependence of on the Eu concentration. Results revealed that all of the as-sprayed samples were a mixture of the structures of monoclinic and hexagonal phases. However, the structural behavior of the postann…
Introduction: History, Motivation.- 1. Finite Generalized Quadrangles.- 2. Elation Generalized Quadrangles, Translation Generalized Quadrangles and Flocks.- 3. The Known Generalized Quadrangles.- 4. Substructures of Finite Nets.- 5. Symmetry Class I: Generalized Quadrangles with Axes of Symmetry.- 6. Symmetry Class II…
doi:10.1088/0953-8984/16/49/001 A two dimensional lattice gas model with a ‘core-softened ’ potential is investigated. Two liquid phases and density anomaly are found. The demixing phase transition between the two liquid phases ends at a tricritical point that is also the terminus of a critical line. The density anoma…
In 2003, numerous advances were made in the area of inorganic polymer science. In the main group, highlights include the preparation of siloxane nanowires using gold nanoparticles, the addition polymerization inorganic multiple bonds, and the development of new σ- and π-conjugated polymers. Novel self-assembled cylind…
This book deals with the theory and experiment of the elementary process of bremsstrahlung, where photons are detected in coincidence with decelerated outgoing electrons. Such experiments allow for a more stringent check of the theoretical work. The main emphasis is laid on electron-atom bremsstrahlung and electron-el…
This article provides a short tutorial review of how laboratory powder diffraction methods can be used to establish a variety of "non-traditional" pieces of information about solid state materials-information beyond simple phase identification or structure determination at a specific temperature. The examples show how…