Engineered interfaces in fiber reinforced composites
Engineered Interfaces in Fiber Reinforced
Materials Literature
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Measurements and modeling of PS/supercritical CO2 solution viscosities
Abstract This paper presents a technology to determine the melt viscosity of a PS/super‐critical CO 2 solution using a linear capillary tube die mounted on a foaming extruder. CO 2 was injected into the extrusion barrel and the content of CO 2 was varied in the range of O to 4 wt% using a positive displacement pump. S…
Electrochemical synthesis of α-cobalt hydroxide
Cathodic reduction of an aqueous solution of cobalt nitrate at low pH, high Co(II) ion concentration (≥1 M) and low current densities (<0.3 mA cm –2 ) leads to the formation of a novel layered hydroxide of Co(II) with an interlayer spacing of 8.93 Å. This hydroxy deficient phase is structurally and compositionally rel…
Polycrystalline and Monocrystalline Pore Arrays with Large Interpore Distance in Anodic Alumina
We have prepared hexagonally arranged pore arrays with large interpore distance ( 200 – 460 nm ) by using two kinds of techniques: a self‐organization process and a prepattern guided anodization on aluminum. The self‐organized pore arrays were produced by anodizing aluminum in an aqueous phosphoric acid solution ( H 3…
Compilation of the fragility parameters for several glass-forming metallic alloys
The fragility parameter, m , in the general classification scheme of glass-forming liquids has been estimated from data provided in the literature for viscosity measurements close to and below the calorimetric glass transition temperature for 21 metallic alloys consisting of ternary, quaternary and quinary alloys. The…
Oligomeric porphyrin arrays
The field of synthesis and physical characterization of oligomeric porphyrin arrays has been the subject of intense research in recent years. Some of these systems present unique physical and optical properties which reflect the extent of electronic interaction between the monomers in the array, and determines their p…
First donor–acceptor interaction promoted gelation of organic fluids
Bile acid derivatives functionalized at the 3-position with an aromatic group formed gels in organic solvents in the presence of trinitrofluorenone.
Alkyl-terminated Si(111) surfaces: A high-resolution, core level photoelectron spectroscopy study
The bonding of alkyl monolayers to Si(111) surfaces has been studied with high-resolution core level photoelectron spectroscopy (PES). Two very different wet-chemical methods have been used to prepare the alkyl monolayers: (i) Olefin insertion into the H–Si bond of the H–Si(111) surface, and (ii) replacement of Cl on…
Substitution Effect on the Coloration Quantum Yield of a Photochromic Bisbenzothienylethene
Abstract Introduction of isopropyl substituents to 2 and 2′ positions of benzothiophene rings of bis(1-benzothiophen-3-yl)hexa-fluorocyclopentene increased the population of anti-parallel conformation, and enhanced the quantum yield of the cyclization reaction.
Structure–functionality relationships of grafted Ti-MCM41 silicas. Spectroscopic and catalytic studies
Detailed spectroscopic measurements have been used to elucidate the nature of Ti(IV)-centred active sites that were anchored to a mesoporous silica surface (MCM41) by two distinct routes from titanocene precursors. The catalyst prepared in dry argon (Ti-MCM41 [Ar]) is more active than that prepared in air (in the pres…
Surface investigation on CexZr1-xO2 compounds
The surface of CexZr1-xO2 compounds has been studied by Fourier transform infrared (FTIR) spectroscopy using adsorbed probe species. Methoxy species, from methanol dissociative adsorption, compensate the coordinative unsaturation of surface cations. From the ν(OC) vibration of methoxy species it was shown that mixed c…
Slow dynamics and ergodicity breaking in a lanthanum-modified lead zirconate titanate relaxor system
The freezing of the dynamic process in a 9/65/35 lanthanum lead zirconate-titanate (PLZT) ceramics has been investigated by measurements of the frequency-dependent complex dielectric constant and the quasistatic field-cooled (FC) and zero-field-cooled (ZFC) dielectric susceptibilities. It was found that the aging proc…
Fiber Crystal Growth From the Melt
The literature on melt growth of single crystalline fibers is reviewed. The paper introduces in the characteristic features and wide field of advanced applications of micro single crystals in elongated form having a small diameter in the region mykrometer-millimeter. A brief historical survey is given. After that typi…
Mechanical Behavior of an Ni-Ti Shape Memory Alloy Under Axial-Torsional Proportional and Nonproportional Loading
Several biaxial proportional and nonproportional loading experiments are reported for thin-wall tubes of a pseudoelastic Ni-Ti shape memory alloy (SMA). In addition to the mechanical behavior, temperature was measured during the experiments. It is shown that the phase transformation exhibits asymmetrical behavior in t…
Multidimensional Director Modeling Using the Q Tensor Representation in a Liquid Crystal Cell and Its Application to the π Cell with Patterned Electrodes
To estimate numerically multidimensional director configurations in a liquid crystal cell, it is important to use the Q tensor representation of the strain free energy because it solves the problem of the difference between the directors, n and - n , in the Frank-Oseen free energy representation. In this paper, we dis…
Synthesis and spectroscopic properties of a new 4-bora-3a,4a-diaza-s-indacene (BODIPY®) dye
The constrained dye 3 was prepared and shown to have a sharper, red-shifted, and more intense fluorescence emission than the 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY®) dye 2 in which the aryl groups can rotate freely.
The CATH Database provides insights into protein structure/function relationships
We report the latest release (version 1.4) of the CATH protein domains database (http://www.biochem.ucl.ac.uk/bsm/cath). This is a hierarchical classification of 13 359 protein domain structures into evolutionary families and structural groupings. We currently identify 827 homologous families in which the proteins hav…
Acoustic and optical methods for measuring electric charge distributions in dielectrics
Much progress had been made during the last two decades in acoustic and optical methods for measuring charge distributions in dielectrics. A review on this topic is given, which mainly covers the past research activities associated with that at our laboratory. For acoustic methods, we will discuss andoompare the pulse…
Second-Order Phase Field Asymptotics for Unequal Conductivities
We extend Karma and Rappel's improved asymptotic analysis of the phase field model to different diffusivities in solid and liquid. We consider both second-order "classical" asymptotics, in which the interface thickness is taken much smaller than the capillary length, and the new "isothermal" asymptotics, in which the…
Simple silica-particle template synthesis of mesoporous carbons
A simple preparative method for mesoporous carbons with high pore volumes using surfactant stabilized silica particles as templates is reported.