Materials Literature
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Abstract The aim of this work is the study of the foaming process of a commercial polyethylene in the presence of a crosslinking agent. Foams have been produced under nearly atmospheric pressure conditions, which commonly occur during polymer rotomolding. Different processingtemperatures and different combinations of…
This chapter contains sections titled: Introduction Polymer Blends Coarse-Grained Polymer Models A Coarse-Grained Model for Binary Polymer Blends Self-Consistent Field (SCF) Theory and Fluctuation Effects Identifying the Effective Flory–Huggins Parameter, ˜χ Single-Chain Conformations in the Bulk Interfaces Liquid–Vap…
ADVERTISEMENT RETURN TO ISSUEPREVCommentComment on "Hydrophobic Forces in the Foam Films Stabilized by Sodium Dodecyl Sulfate: Effect of Electrolyte" and Subsequent CriticismCosima Stubenrauch, Dominique Langevin, Dotchi Exerowa, Emil Manev, Per M. Claesson, Ludmila B. Boinovich, and Regine v. KlitzingView Author Info…
Abstract This article describes some properties and behavior of oxidized cellulose evaluated with ultraviolet–visible spectroscopy. Newly defined analytical parameters are described. Mechanisms of poly(1,4‐β‐ D ‐anhydroglucuronic acid) degradation and destruction are formulated. The feasibility of using the same Staud…
Nature's use of biomineralization polypeptides to control and modulate the growth of biogenic minerals is an important process that, if properly understood, could have significant implications for designing and creating new inorganic-based materials. Although the sequences for a number of biomineralization proteins ex…
Abstract The structure and binding energies of mercury telluride crystals encapsulated within single walled carbon nanotubes (SWNTs) have been studied using density functional theory. The energies of three different pseudo one‐dimensional crystals of HgTe with 4:4, 3:3, and 2:2 coordination are compared. The initial s…
The role of the crystalline polarity of zinc oxide (ZnO) in the interfacial properties was investigated with semiconductor–insulator–semiconductor structures prepared from ZnO single crystals and an oxide glass insulator. The insulator/ZnO(0001) interface showed highly nonlinear current–voltage ( I – V ) relationships…
In Tip-Enhanced Raman Spectroscopy (TERS) a metal (or metallized) sharp tip is used to enhance the electromagnetic field by a localized surface-plasmon excitation. Two different modes – atomic force mode (AFM) and scanning tunneling mode (STM) – together with their respective types of probe tips are used in TERS exper…
Abstract A structured triblock protein was designed to explore the potential of engineered peptides to function as high‐performance ink dispersants and binders. The protein consists of three functional elements, including a pigment binding domain, a hydrophilic linker, and a printing surface binding domain. To constru…
We have theoretically investigated the capacitance of a double-walled carbon nanotube (CNT) (4,0)@(24,0) as a nanoscale coaxial-cylindrical capacitor. To calculate the responses of the capacitor to the bias application, we have used a first-principles method based on the density-functional theory with a local-density…
An intergranular layer was found in 0.4 mol% Y-doped BaTiO3, which was sintered below the eutectic temperature in air. The layer possessed a crystal structure similar to Ba6Ti17O40 with a thickness of 0.7 nm. Plate-like second phases of Ba6Ti17O40 were also observed at triple-grain junctions and an orientation relatio…
Abstract Polyaniline (PANI)–organoclay nanocomposites were prepared. Intercalation of aniline monomer into montmorillonite (MMT) modified by polyoxyalkylene was followed by subsequent oxidative polymerization of the aniline in the interlayer spacing. The organoclay was prepared by cation exchange process between sodiu…
The purpose of this study is to provide a quantitative characterization of the thermal behavior of amorphous organic pharmaceutical compounds across their glass transition temperature, and to assess their molecular mobility as a function of temperature and time by combining theoretical simulations with experimental me…
The year 2007 marks the 50th anniversary of Keller's seminal proof that thin polyethylene crystals grown from dilute solution are composed of chain-like molecules that are folded.1 Shortly thereafter it was demonstrated that polymer crystals grown from the melt phase also are plate-like with stems oriented in the thin…
Fluorescence spectroscopy and electron paramagnetic resonance (EPR) provide insights into the nature and dynamics of disulfide binding to the surface of CdSe quantum dots. We show evidence that adsorption occurs slowly but irreversibly, leading to time-dependent quenching efficiency.
Electrochromic properties of spun films of bis[octakis(hexylthio)phthalocyaninato] dysprosium(III) were investigated for determining nicotinamide adenine dinucleotide hydride (NADH) in water solutions. A spin-coated film deposited on indium tin oxide electrode displays only one redox couple (at E1/2=0.78V). The films…
X-ray photoelectron spectroscopy (XPS) and atomic force microscopy have been used to study Co nanoparticles evaporated onto freshly cleaved highly oriented pyrolytic graphite (HOPG) surfaces. XPS chemical characterization employed symmetrical line shapes and was carried out as functions of the amount of Co deposited a…
La 0.5 Ba 0.5 MnO 3 products with novel flowerlike, microcube, and nanocube structures were successfully synthesized by a simple hydrothermal route by controlling the alkalinity of the reaction solutions. The synthesized products were systematically studied by X-ray powder diffraction, field-emission scanning electron…
The kinetics of propylene oxidation to propylene oxide (PO) with H 2 /O 2 mixtures on gold supported on the mesoporous titanium silicate, Ti-TUD, was investigated using Langmuir−Hinshelwood (L−H) models and power−rate law (PRL) models. The catalyst gave stable activity and was appropriate for the kinetic studies, givi…
O estudo químico das cascas das raízes de Spathodea campanulata (Bignoniaceae) conduziu ao isolamento de um irióide glicosilado (ajugol) e dois derivados fenólicos (ácido p -hidroxi-benzóico e p -hidroxi-benzoato de metila). Os compostos foram identificados com base na interpretação dos seus dados espectrais. A ativid…