Materials Literature
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Abstract The synthesis of an amphiphilic triarm star copolymer based on polystyrene, poly(ethylene oxide) and poly(ε‐caprolactone) block has been achieved by a novel strategy which consists in the preparation of a diblock copolymer, polystyrene‐ block ‐poly(ethylene oxide), having a protected anionic initiator group a…
In order to further improve the sensitivity of chemical IR sensors, research into a significant change in the signal generation mechanism was carried out. This effort was realized by generating the surface-enhanced IR absorption and Raman-scattering effect at silver- and gold-island-covered Ge- and ZnSe ATR surfaces f…
A novel method of measuring local electrochemical impedance using a single vibrating probe electrode has been developed by modification of a commercial device of scanning vibrating electrode technique (SVET). The small size of the vibrating probe used by the SVET minimizes the screening effect of the probe on the dist…
The X-ray diffraction of CCl 4 molecules adsorbed in slit-shaped graphitic micropores was measured at 303 K. The effect of the pore width in the range of 0.75−1.13 nm on the structure of CCl 4 molecular assembly in the micropores was examined. The electron radial distribution function (ERDF) analysis was applied to th…
The morphological behavior of three well-defined miktoarm star block copolymers having 16 arms/molecule was characterized using transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and small-angle neutron scattering (SANS) techniques. The molecules, called Vergina stars, have 8 arms of polyisop…
This book is formed from the `fall out' of the Second Mediterranean Workshop and Topical Meeting on Novel Optical Materials and Applications. The editors have primarily aimed this work as a reference text for a broad spectrum of research scientists both in academia and industry. Consisting of eleven chapters, the book…
Oxygen coulometric titration has been applied to measure chemical diffusion in between 700 and 1000°C. The transient current response to a potentiostatic step has been transformed from the time domain to the frequency domain. The equivalent circuit used to fit the resulting impedance data contains the element that des…
We have investigated the decay processes of the Er:4S3/2 and F39/2 states and the mechanisms of frequency upconversion under 800 nm excitation of Er3+ in ternary ZrF4–BaF2–LaF3 glasses. The decay processes of the Er:4S3/2 and F49/2 states are discussed on the basis of the Er concentration dependence of the fluorescenc…
The crystal structure of despentapeptide insulin, a monomeric insulin, has been refined at 1.3 A spacing and subsequently used to predict and model the organization in the insulin fibril. The model makes use of the contacts in the densely packed despentapeptide insulin crystal, and takes into account other experimenta…
Electrodepositiona s an approach to quantum confinement is the idea behind the work on nanocomposite films of Cu and Cu 2 O reported here. The phase of the film electrodeposited from an alkaline aqueous solution of copper(II) lactate depends on the cathodic current density used, varying from pure Cu 2 O (a p‐type semi…
This study considers how the electronic relaxation rate enhancement effects of strong antiferromagnetic coupling in the Fe III −X−Cu II unit (X = O 2 -, OH - ) of complexes [(F 8 -TPP)Fe III −O−Cu II (TMPA)] + ( 1 ), and [(F 8 -TPP)Fe III −OH−Cu II (TMPA)] + ( 2 ) (F 8 -TPP = tetrakis(2,6-difluorophenyl)porphyrinate(2…
Chemists have always derived their knowledge about chemical reactions by inductive learning from observations on a series of individual chemical reactions. Predictions of the products of chemical reactions are made by analogy. With the availability of large reaction databases this process can be automated. In this pap…
The results of the structural determination of Li2MnO3 from X-ray powder diffraction data and the refinement by the Rietveld technique are presented. The Li2MnO3 structure has a monoclinic cell with space group C2/m(Z = 4) and cell parameters a = 4.9246 (1), b = 8.5216 (1), c = 5.0245 (1) Å, β = 109.398 (1)°; the refi…
Absolute rate theory and the sticking probability approach have been previously examined as possible means of predicting the rate of adsorption. However, when applied to examine adsorption kinetics, they have been found not to contain the coverage and pressure dependence required for several important systems includin…
We have investigated the electro-optical effects and physical switching principle of homogeneously aligned nematic liquid crystals when applying an in-plane electric field with interdigital electrodes. By using the in-plane switching (IPS) of the liquid crystals which is achieved by the in-plane electric field, the vi…
We describe the deposition and characterization of nanocrystalline CdTe films which exhibit size quantization. The CdTe films were electrodeposited from a dimethylsulfoxide solution of tri-( n -butyl)phosphine telluride and cadmium perchlorate at 100 °C. The stoichiometry of the films depends on applied potential and…
Abstract Phase and morphological changes during thermolysis of Mg 4 Al 2 (OH) 12 CO 3 · n H 2 O and Zn 6 Al 2 (OH) 16 CO 3 · n H 2 O layered double hydroxides (LDH) and their nanocomposites with poly(styrene sulfonate) (PSS) are studied by X-ray powder diffraction (XRD), scanning and transmission electron micrography…
The process of protein crystallization often takes place too rapidly, thus producing showers of crystals instead of large single crystals. A novel technique for improving protein-crystal size by slowing down the crystallization process is described. This is achieved by the setting up of a vapour-diffusion experiment w…
The synthesis of dicyanooligothiophenes NC(C 4 H 2 S) n CN ( n = 3−6) is reported. For n = 3, 4, and 5 the dinitriles are generated by treatment of the corresponding dibromo compounds with copper(I) cyanide in quinoline. For n = 6 the preparation involves the Ni-catalyzed coupling of 5-bromo-2,2‘:5‘,2‘‘-terthiophene-5…
Growth of diamond has usually been discussed without invoking any form of surface diffusion. Our recent theoretical results identified, however, that bridging CH 2 and CCH 2 groups and radical vacancies can migrate on diamond {100} surfaces. The present work further explores migration of hydrogen atoms, bridging group…