Materials Literature
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Conjugated porphyrin polymers are giant supramolecular chromophores with extraordinary electrooptical and nonlinear optical properties. Close collaboration between synthetic organic chemists, chemical physicists and theoreticians has yielded new insights into the electronic structure of these remarkable materials. Alk…
Future applications for glass‐ceramics are likely to capitalize on designed‐in, highly specialized properties for the transmission, display, and storage of information. Glass‐ceramics with microstructures comprised of uniformly dispersed crystals <100 nm in size offer promise for many potential new applications as…
The vast majority of materials have a positive coefficient of thermal expansion and their volume increases on heating. There has been considerable recent interest in materials which display the unusual property of contracting in volume on heating; i.e. those with a negative coefficient of thermal expansion. This Persp…
Anode‐supported solid oxide fuel cells with yttria‐stabilized zirconia (YSZ) electrolyte, Sr‐doped (LSM) + YSZ cathode, and Ni + YSZ anode were fabricated and their performance was evaluated between 650 and 800°C with humidified hydrogen as the fuel and air as the oxidant. Maximum power densities measured were at 800°…
During the past decade, important advances have been made in the understanding of the hydrolytic degradation characteristics of aliphatic polyesters derived from lactic acid (LA) and glycolic acid (GA). Degradation of large poly(LAGA) (PLAGA) polymers is autocatalyzed by carboxyl end groups initially present or genera…
An overview is given of recent tests of the mode-coupling theory for the evolution of structural relaxation in glass-forming liquids. Emphasis is put on comparisons between the leading-order asymptotic formulae derived for the dynamics near glass transition singularities and the results of neutron scattering, depolari…
A mesoporous carbon with regular three-dimensionally interconnected 2 nm pore arrays using AlMCM-48 as a template has been synthesised; the mesoporous carbon exhibited excellent performance as an electrochemical double layer capacitor.
In this paper we present SFCHECK, a stand-alone software package that features a unified set of procedures for evaluating the structure-factor data obtained from X-ray diffraction experiments and for assessing the agreement of the atomic coordinates with these data. The evaluation is performed completely automatically…
PREFACE APPENDICES A. THE SHAPE OF SINGLE SOAP FILMS AND BUBBLES B. THE THEOREM OF LAMARLE C. BUBBLE CLUSTERS D. THE DECORATION THEORUM E. THE CONDUCTIVITY FORMULA OF LEMLICH F. THE DRAINAGE EQUATION G. PHYLLOTAXIS H. SIMULATION OF LIQUID FOAMS I. BIBLIOGRAPHY APPENDICES
Liquid microchannels on structured surfaces are built up using a wettability pattern consisting of hydrophilic stripes on a hydrophobic substrate. These channels undergo a shape instability at a certain amount of adsorbed volume, from a homogeneous state with a spatially constant cross section to a state with a single…
Diatoms are microscopic algae which are found in virtually every habitat where water is present. This volume is an up-to-date summary of the expanding field of their uses in environmental and earth sciences. Their abundance and wide distribution, and their well-preserved glass-like walls make them ideal tools for a wi…
A number of polynuclear d10 transition metal complexes have been found to exhibit interesting luminescence properties. The photoluminescence properties of polynuclear d10 metal complexes are highly diversified. In the presence of a wide range of bridging and ancillary ligands, the excited states of such complexes have…
A multi-reference source spanning the whole composites science field, this text covers such topics as: fibre reinforcements and general theory of composites; polymer matrix composites; metal matrix composites; test methods, nondestructive evaluation and smart composites; and design and application.
The radiative rate constants for depopulation of the excited states of closely-related series of anionic, neutral and cationic europium, terbium and ytterbium complexes have been measured in H2O and D2O. With the aid of selective ligand deuteriation, the relative contributions of OH, NH (both amide and amine) and CH o…
Natural fiber reinforced composites is an emerging area in polymer science. These natural fibers are low cost fibers with low density and high specific properties. These are biodegradable and non-abrasive. The natural fiber composites offer specific properties comparable to those of conventional fiber composites. Howe…
This review presents a wide-ranging broad-brush picture of dielectric relaxation in solids, making use of the existence of a `universality' of dielectric response regardless of a wide diversity of materials and structures, with dipolar as well as charge-carrier polarization. The review of the experimental evidence inc…
The effect of Cr and Mo on the corrosion resistance of super 13Cr stainless steel in CO{sub 2} environment has been investigated by the electrochemical technique and the surface film analysis. The corrosion rate in CO{sub 2} environment at elevated temperatures is reduced with the increase in the effective Cr content.…
The rupture of cationic giant vesicles (see the picture) in the presence of anionic vesicles, or the reverse, on exposure to digitonin is dependent on the respective cholesterol levels (0-50 mol%). Thus a disparate giant vesicle population can be chemically induced to release the contents from only a portion of its me…
Oxidative electropolymerization at glassy carbon and indium−tin−oxide electrodes from unbuffered aqueous solutions of Fe(5-NH 2 -phen) 3 2+ and Ru(5-NH 2 -phen) 3 2+ yields electrode-supported films that self-limit at thicknesses of ca. 50 and 2 nm, respectively. Electrodeposition is characterized by formation of none…
Recently we reported the femtosecond dynamics of some porphyrin molecules. These studies elucidated the elementary steps involved in intramolecular relaxation and charge transfer (CT) in cobalt tetraphenylporphyrin (CoTPP) from the porphyrin π (a_(2u)) system to the Co(d_z^2). Our interest in the dynamics of intramole…