Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Although the minimum energy conformation of the mesogenic molecule 4-n-pentyl-4′-cyano-biphenyl (5CB) is known to have an inter-ring torsional angle of 37.0° and an alkyl tail which lies perpendicular to the adjoining phenyl ring, less is known about the conformational properties of the alkyl tail. This paper investig…
Molten inorganic salt hydrates can be used to dissolve cellulose. According to the salt concentration molten salt hydrates are arranged between concentrated salt solutions and anhydrous melts. As new cellulose solvents molten LiClO 4 *3H 2 O and LiI*2H 2 O were found. Mixtures of LiClO 4 *3H 2 O with e. g. Mg(ClO 4 )…
The phenomenon of nanosized particle structuring and structural transitions due to confinement in thin liquid films is of considerable interest in both science and technology. Our recent experimental observations on thinning of single liquid films containing monodispersed nanosized colloidal particles with diameters v…
Perylenetetracarboxydiimide (PEDI) shows a unique fluorescence property. The dye is highly fluorescent in 3,3‘4,4‘-biphenyltetracarboxylic dianhydride (BPDA)-derived polyimide (PI) matrices but turns nonfluorescent in PIs from pyromellitic dianhydride (PMDA). The results can be explained in terms of a fluorescence que…
Room temperature green and red light emission under ultra violet radiation have been observed from CdS nanocrystals. The chemical route used suggested a size distribution of nanocrystallites and was confirmed by atomic force microscopy analysis. The red band photoluminescence is ascribed to the presence of CdO phase a…
The design and analysis of a dielectric guided-mode resonance filter (GMRF) utilizing a nonlinear material for the waveguide is presented. Small changes to the parameters of a GMRF have a large impact on its resonance. A nonlinear material can provide a small change in the refractive index of the waveguide, altering t…
The dynamic wetting of a commercial alkyl ketene dimer (AKD) wax was measured on model cellulosic surfaces. The variables investigated were temperature and the surface composition. The model surfaces consisted of cellulose and cellulose acetate films as well as glass. These surfaces are smooth by industrial standards…
Molecular dynamics simulations have been performed for a liquid crystal composed of a Gay—Berne core site with two alkyl chains of different length (C7 and C3) at either end of the molecule. Calculations have been carried out for 512 molecules in the NVT ensemble for simulation times of up to 8.0ns at two distinct den…
We present a new, biased Monte Carlo scheme for simulating complex, cyclic peptides. Backbone atoms are equilibrated with a biased rebridging scheme, and side-chain atoms are equilibrated with a look-ahead configurational bias Monte Carlo. Parallel tempering is shown to be an important ingredient in the construction o…
The lattice constant, dc resistivity, dielectric constant, saturation magnetization and Curie temperature were studied on a series of Cr-substituted Li-Sb ferrite systems. The dc resistivity increases with increase of the chromium level. A change in slope was observed in the variation of resistivity with temperature a…
A hyperbranched polyester based on 3,5-dihydroxybenzoic acid was completely modified with dodecanoyl chloride to result in an amphiphilic, globular polymer, which has a polar core and a nonpolar outer sphere with the ability both to incorporate an organic dye and to interact with a nonpolar matrix. A series of blends…
Porous polytetrafluoroethylene films were positively or negatively corona-charged at room or elevated temperatures and their charge-storage behaviour was investigated by means of isothermal surface-potential and thermally stimulated discharge-current measurements. In addition, electron micrographs of the sample morpho…
Since the discovery of small diamond grains in meteorites, the presence of such grains in the interstellar medium has been suspected. Here we report what we think to be the first unambiguous evidence of the presence of small crystallites of diamond in the dusty envelopes surrounding stars. Thanks to experimental resul…
An improved formulation of the one-step model of photoemission from crystal surfaces is proposed which overcomes different limitations of the original theory. Considering the results of an electronic-structure calculation, the electronic (one-particle) potential and the (many-body) self-energy, as given quantities, we…
Density-functional-theory calculations for the adsorption of molecular nitrogen on ruthenium surface are reported. It is found that nitrogen molecule is adsorbed while standing perpendicular to the triangular surface of ruthenium. The doping by K atoms favours the adsorption of molecular nitrogen. The calculation of t…
The collapse of flexible polyelectrolytes in a solution of multivalent counterions is studied by means of a two state model. The states correspond to rod-like and spherically collapsed conformations respectively. We focus on the very dilute monomer concentration regime where the collapse transition is found to occur w…
The important integrated circuit failure mechanism of electromigration is reviewed. The basic physics of failure is introduced and the concepts of electromigration and thermally induced stresses are discussed. A concept of thermodynamics in a conducting material and the response to non-direct current will be presented.
The spreading velocity of liquids on the surface of a liquid crystalline polymer can be tremendously affected by a slight temperature change. Indeed, a bulk transition between a highly ordered smectic and an isotropic phase induces a sharp change from a rigid to a soft behavior, with consequent effects on the tack pro…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAn A2 + B3 Approach to Hyperbranched Aliphatic Polyethers Containing Chain End Epoxy SubstituentsTodd Emrick, Han-Ting Chang, and Jean M. J. FréchetView Author Information Department of Chemistry, University of California, Berkeley,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGold-Based Therapeutic AgentsC. Frank ShawView Author Information The Department of Chemistry, Eastern Kentucky University, Richmond, Kentucky 40475-3124, and The Department of Chemistry, University of WisconsinMilwaukee, Milwaukee, Wisconsin 53201-0413 Cite this: Chem. Rev.…