Materials Literature
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All representatives of an inorganic crystal structure type can be found systematically in the new database SICS (Standardized Inorganic Crystal Structures). It is derived from the Inorganic Crystal Structure Database (ICSD) by selecting the best determination of each phase. In addition, each entry is given in a standa…
Controlling bacterial biofouling is desirable for almost every human enterprise in which solid surfaces are introduced into nonsterile aqueous environments. One approach that is used to decrease contamination of manufactured devices by microorganisms is using materials that easily slough off accumulated material (i.e.…
We study the phase behavior of model colloidal systems composed of infinitely thin hard platelets, with polydispersity in the size of the particles. Semi-grand Gibbs ensemble simulations are used to study the coexisting nematic and isotropic phases for a range of systems with varying polydispersity. Particle size segr…
The present study was carried out in an attempt to make a gelatin film strongly bioadhesive by introducing free dangling aldehyde groups. When gelatin films were treated with 0.5M of glutaraldehyde (GA) solution at 60 degrees C, free aldehyde groups (up to 150 micromol/g) were introduced in the film. The bonding stren…
We developed a new lattice Boltzmann method that allows the simulation of two-phase flow of viscoelastic liquid mixtures. We used this new method to simulate a bubble rising in a viscoelastic fluid and were able to reproduce the experimentally observed cusp at the trailing end of the bubble.
We propose a di-interstitial model for the P6 center commonly observed in ion implanted silicon. The di-interstitial structure and transition paths between different defect orientations can explain the thermally activated transition of the P6 center from low-temperature C1h to room-temperature D2d symmetry. The activa…
We study the critical dynamics of three-dimensional ferromagnets with uniaxial anisotropy by taking into account exchange and dipole-dipole interaction. The dynamic spin correlation functions and the transport coefficients are calculated within a mode coupling theory. It is found that the crossover scenario is determi…
This paper reports ${}^{139}\mathrm{La}$ NMR measurements of a powder sample of the colossal magnetoresistance compound ${\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}{(T}_{c}=268 \mathrm{K})$ performed in the paramagnetic state (292--575 K) and in high magnetic fields (2.00--9.40 T). Analysis of the spectru…
Classical hard spheres crystallize at equilibrium at high enough density. Crystals made up of stackings of two-dimensional hexagonal close-packed layers (e.g., fcc, hcp, etc.) differ in entropy by only about ${10}^{\ensuremath{-}3}{k}_{B}$ per sphere (all configurations are degenerate in energy). To readily resolve an…
Numerical simulation of the dislocation motion in 2D Frenkel - Kontorova (FK) model in the thermostat shows an unusual dynamical behavior. It appears that ''kink'' regime of dislocation gliding takes place in a certain region of parameters of the model but, in disagreement with the common views about the dislocation m…
The aim of the study is to investigate new intumescent materials based on ethylene-vinyl acetate copolymers. Hostaflam AP 750 is used as a flame-retardant system. Fire testing and thermal analyses have shown that the incorporation of AP 750 leads to the formation of an intumescent coating which provides good fire barr…
On the basis of Raman spectra and x-ray-diffraction patterns, we show that both dense zirconium and hafnium dioxides adopt the same structural phases, in similar pressure ranges. Furthermore both dioxides may be quenched at room conditions from high pressure to give polycrystalline solids which present optical transpa…
Crystalline TiO 2 powders were prepared by the homogeneous precipitation method simply by heating and stirring an aqueous TiOCl 2 solution with a Ti 4+ concentration of 0.5 M at room temperature to 100°C under a pressure of 1 atm. TiO 2 precipitates with pure rutile phase having spherical shapes 200‐400 nm in diameter…
The indirect Fourier transformation (IFT) is the method of choice for the model-free evaluation of small-angle scattering data. Unfortunately, this technique is only useful for dilute solutions because, for higher concentrations, particle interactions can no longer be neglected. Thus an advanced technique was develope…
This paper describes a simple orbital picture for understanding the optical transitions and the second-order nonlinear optical response of metallocene-based chromophores of the form metallocene−(π-bridge)−acceptor, and experimental studies to test this model. From a combination of UV photoelectron spectroscopy, cyclic…
A model for metal-oxide surge arresters, derived from that one recommended from the IEEE W.G. 3.4.11, is presented. The main innovation introduced by the paper lies in the simplicity of the criteria proposed for the model's parameter identification. Such criteria allow calculation of the model parameters directly from…
Hexagonally ordered nanopore arrays in anodic alumina with high aspect ratios (see Fig.) have been produced using a self-organization process. The pore arrays are straight and parallel, and of polycrystalline structure. The distance between pores can be controlled by adjusting the electrolyte and the applied voltage.…
Various deformation models incorporating higher-order gradients are discussed and their implications are considered in a variety of problems ranging from the determination of the size of dislocation cores or elastic dislocation interaction to the determination of wavelengths of dislocation patterns or heterogeneous di…
Liquid Crystals -- Basic Physical Properties: Structure and Symmetry of Liquid Crystal Phases. LC Mixtures, the Temperature Range and Phase Transitions. Basic Physical Properties. Surface Phenomena and Cell Preparation. New Basic Developments in Liquid Crystals. Electrooptical Effects in Liquid Crystal Materials: Elec…
Colloidal gold adsorbed onto positively charged substrates forms a two-dimensional layer with a maximum coverage of 1 colloid/1000 nm 2 as shown by optical absorption spectroscopy, small-angle X-ray scattering, and atomic force microscopy. Positively charged substrates are obtained by either chemisorption of end-group…