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。
Progress in the field of discotic liquid crystals is summarized, with emphasis on experimental results rather than theoretical developments. Examples are given of discotic mesogens (including metallo-mesogens) and discotic polymers, and the structures of the mesophases identified to date are described.
Sinterable cordierite glass-ceramics developed for use in fabricating copper-glass-ceramic multilayer substrates have been studied to understand the important role of the composition in sintering, crystallization, and microstructural development
This symposium was held February 22--24, 1993 in Denver, Colorado as part of the 1993 Annual TMS Meeting. The purpose of this symposium was to provide a forum for exchange of state-of-the-art information on titanium alloys. Attention is focused on the following: alloy development; environmental aspects; microstructure…
A general scheme for the improvement of electron-density maps is described which combines information from real and reciprocal space. The use of Sayre's equation, solvent flattening and histogram matching within this scheme has been described previously [Main (1990). Acta Cryst. A46, 372-377]. Non-crystallographic sym…
Thermal oxidizing treatments of hydrogenated diamond surfaces have been performed in an O2 environment. Chemisorption of oxygen on diamond surfaces has been investigated by diffuse reflectance Fourier-transform infrared (FTIR), temperature-programmed desorption (TPD), temperature-programmed reaction (TPR) and thermogr…
The effect of dilute, insoluble surfactant on the deformation and breakup of a viscous drop is examined. Two cases are considered: the deformation and stretching of a drop in a uniaxial extensional flow and the surface-tension-driven motion of an elongated drop in a quiescent fluid. Aside from rescaling the mean capil…
F. G. N. Cloke, Chem. Soc. Rev., 1993, 22, 17 DOI: 10.1039/CS9932200017
A previously developed method of partial discharge (PD) recognition is used to evaluate PD in HV devices. Using conventional discharge detection (bandwidth approximately 400 kHz), the PD patterns are studied. By means of unambiguous statistical operators like skewness, kurtosis, number of peaks, etc., quantitative inf…
A new type of biomaterial for artificial skin was developed as a form of sponge by combining fibrillar collagen (F-collagen) with gelatin. The sponge was physically and metabolically stabilized by introducing dehydrothermal cross links. To get the final product, various conditions in the preparation of sponges were ev…
Smart pixels are discussed in terms of the following neurally inspired functions: memory, sensors, intrapixel circuitry, interpixel communication, and optical outputs. The types of liquid crystals and electronic circuits used in VLSI/liquid crystal arrays, and their electrooptic properties are reviewed. Examples of el…
The influence of a range of soluble biological and related molecules on the crystallization of CaCO3 from aqueous supersaturated solution has been studied by optical and scanning electron microscopy and X-ray diffraction. The efficacy of monofunctional additives to induce morphological changes increased with overall a…
Mathematical modeling of mass, momentum, heat, and species transport phenomena occurring during solidification of metal alloys is reviewed. Emphasis is placed on the incorporation of the effects of the solid structure and the interactions between the solid and liquid phases on a microscopic scale into a (macroscopic)…
Abstract
The Kohlrausch-Williams-Watts (KWW) and the Havriliak-Negami (HN) relaxation functions have been widely used to describe the relaxation behavior of glass-forming liquids and complex systems over the last several years. The HN relaxation function is a frequency-domain function while the KWW function applies for the tim…
The Ti–Ni–Nb shape memory alloys are attracting recent attention for the wide transformation temperature hysteresis, which is caused by the As increase due to pre-deformation, since it is suitable for pipe couplings. To find out the origin for the As increase by pre-deformation, similar investigation was made by tensi…
A synthetic pathway is described to construct "in bulk" two-dimensional (2D) polymers shaped as molecular sheets. A chiral oligomeric precursor is used that contains two reactive sites, a polymerizable group at one terminus and a reactive stereogenic center near the middle of the molecule. The bulk reaction yields bil…
The functional photoswitchable systems 1–3 and 12–15 display pronounced photochromic properties; the bis-pyridinium derivative 1 represents a prototype of a switched molecular wire which may be converted from an open unconjugated form to a closed electron-conducting state.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBorohydride reduction of cobalt ions in water. Chemistry leading to nanoscale metal, boride, or borate particlesGeorge N. Glavee, Kenneth J. Klabunde, Christopher M. Sorensen, and George C. HadjipanayisCite this: Langmuir 1993, 9, 1, 162–169Publication Date (Print):January 1…
A thermochemical kinetics analysis has been carried out for growth on the (100)-(2xl):H diamond surface using a pair of previously proposed mechanisms which operate sequentially. Half of the growth on such a surface is accounted for by insertion into dimer bonds, while the other half is accounted for by addition acros…
X-ray diffraction, transmission electron microscopy, and differential scanning calorimetry were used to study the thermal stability of highly supersaturated nanocrystalline FexCu100−x alloys (10≤x≤95) synthesized by mechanical alloying. Alloys with x<60 exhibit single-phase fcc structure while single-phase bcc…