Materials Literature
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We have determined the internal organization of elongated sexithiophene aggregates in solution by combining small-angle X-ray scattering and magnetic birefringence experiments. The different aggregate axes can be probed independently by performing the experiments on magnetically aligned aggregates. We have found multi…
An ultrasonic vibration cavitation erosion experiment was performed to study the thermal effect during the erosion process. The ring affected zone was observed on the sample surface around the erosion pit at the incipient stage of the cavitation erosion. The results of the surface testing on roughness, hardness, and c…
Rate constants for thermal cis-to-trans isomerization of N-(phenylazo)-substituted nitrogen ring heterocyles were determined as a function of phenyl ring substitution, cyclic amine ring size, and organic solvents. Observed first-order rate constants are found to increase with increasing electron-withdrawing character…
Abstract Turn up the heat! Iron and ruthenium nanoparticles in carbon have been prepared by thermolysis of iron and ruthenium fullerene complexes at 500–900 °C in nitrogen. Differences in their size, formation processes, and catalytic activities have been characterized using TG‐DTA, VT‐TEM, and VT‐XRD analyses. magnif…
Definitive prion disease diagnosis is currently limited to postmortem assay for the presence of the disease-associated proteinase K-resistant prion protein. Using cerebrospinal fluid (CSF) from prion-infected hamsters, matrix-assisted laser desorption/ionization Fourier transform mass spectrometry (MALDI-FTMS), and su…
In this paper we have performed density-functional study on the adsorption and diffusion of various alkali-metal ions on the surface of pristine and defective armchair single-wall carbon nanotubes. In the pristine SWNT system, the position above the hexagon is believed to be the most stable site for adsorption, while…
Abstract Effect of metallic oxides on flame retardancy and the thermal stability of styrene butadiene rubber (SBR) composites based on ammonium polyphosphate (APP) and pentaerythritol (PER) was studied by the limiting oxygen index (LOI), UL 94, the cone calorimeter tests, and thermogravimetry analysis (TGA), respectiv…
Porphyrin rings CZ4, CZ6, and CZ8 that respectively comprise four, six, and eight porphyrins, immobilized in a thin PMMA film, have been investigated using single molecule fluorescence spectroscopy with a focus on the influences of the overall structural rigidity as the ring size of porphyrin array increases. Neighbor…
The purpose of this research was to explore the effects of textile properties on the microclimate inside caps and on subjective wearing sensations. Physical tests on heat and moisture transfer properties of cap fabrics were conducted, as well as tests on the sensations from subjects wearing the caps. The temperature a…
This article presents an industrially feasible method to effectively reduce vessel picking tendency by a simple chemical modification of pulp. ECF-bleached eucalyptus kraft pulp was treated with carboxymethyl cellulose (CMC) under specified conditions. The aim was to study the effects on vessel element structure and v…
Highly sensitive palladium (Pd) decorated carbon nanotube (CNT) embedding gas sensors working at atmospheric pressure were fabricated. Two types of gas sensors of bare CNTs and Pd nanoparticle decorated CNTs were synthesized by dielectrophoresis. The CNT-containing solution was dropped onto the patterned-platinum elec…
The epoxidation of hydroxyl-terminated polybutadiene (HTPB) via phase transfer catalysis (PTC) using H 2 O 2 as the oxidant and ammonium tungstate hydrate and phosphoric acid as the cocatalysts was successfully carried out in an acidic solution/organic solvent two-phase medium. The microstructures of original and epox…
We present a simple method to improve the transparency and rheological properties of polystyrene/organoclay nanocomposites. Such composites are typically prepared using organophilic derivatives of commercial montmorillonite (MMT) clays that contain a wide range of particle sizes. Our approach is to fractionate the nat…
Alternate bilayer structures of N, N ′-bis(2,5-di- tert -butylphenyl)-3,4,9,10-perylene dicarboximide (PDI), free-base phthalocyanines (Pc), and double-linked free-base phthalocyanine−fullerene dyad (Pc−C 60 ) were prepared by the Langmuir−Schäfer method and studied using a range of optical spectroscopy methods includ…
In this paper we report on the water permeability behavior of nonwoven fabrics produced from flax fibers. Three different types of needle punched nonwoven fabrics are produced by varying the depths of needle penetration during the needle punching process. The pore size and its distribution in the nonwoven fabrics are…
In this study, monofilament tubular braided structures were fabricated and their performances were analyzed. The braided tubes are in three-dimensional form, made of polyester monofilaments intended for use in medical applications. This type of structure, called a stent, is used to open clogged arteries and veins by e…
Horizontally aligned single-walled carbon nanotubes (SWNTs) were directly grown across trenches produced on SiO(2)/Si substrate, forming suspended aligned SWNTs over the trenches, and were fabricated with simple methods for infrared (IR) detection application. The horizontally aligned SWNTs can grow across trenches as…
Summary Antifungal biopolymers were prepared by incorporating natamycin (NA) and NA + rosemary extract (RE) into wheat gluten (WG) and methyl cellulose (MC) films. Interaction between antimicrobial agents and biopolymers was determined with mid‐infrared spectroscopy and scanning electron microscopy (SEM). Water vapour…
The influence of temperature, pulping time and soda concentration on the yield, kappa index, brightness and fiber density of Agave Americana L. pulp has been studied. Using a factorial design to identify the optimum operating conditions, equations relating the dependent variables to the operational variables of the pu…
We investigated charge-carrier transport in the nematic phase of small molecules such as 2-phenylbenzothiazoles by time-of-flight experiments, in which the conduction mechanism has been considered to be ionic. As a result, we established the hole and electron transports in the nematic phase of highly purified samples:…