Materials Literature
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We have synthesized dendrimers of the amino-acid lysine bound to a central poly(ethylene glycol) (PEG) core, and then formed multiple diazeniumdiolate nitric oxide (NO) donors on the lysine residues. NO release from these materials occurred for up to 60 days under physiological conditions. These materials display the…
The non-linear electrical characteristics of a polymeric electrochemically controlled junction based on a conducting polymer (polyaniline) and a solid electrolyte (Li doped polyethylene oxide) are considered as basic features for the realization of smart materials based on the statistical occurrence of such heterojunc…
An engine oil condition sensor based on multiwall carbon nanotubes was fabricated with the screen printing method. Carbon nanotube (CNT) paste was printed between two parallel-aligned electrodes. The conductivity change in the engine oil according to mileage was measured by using CNT oil sensor. The sensor output was…
In order to obtain highly dispersed heteropolyacids (HPAs) species, H3PMo12O40 and H4PVMo11O40 were supported on various supports: silica (Aerosil - Degussa and Romsil types) and TiO2. The structure and thermal decomposition of supported and unsupported HPAs were followed by different techniques (TGA-DTA, FTIR, XRD, l…
The dynamic mechanical properties of high strength aluminum–scandium (Al–Sc) alloy are investigated using a compression split Hopkinson bar. Dynamic impact testing is carried out at nominal strain rates (abbreviated to strain rate hereafter) ranging from 1.2×103 to 5.8×103 s−1 at room temperature. The effects of strai…
The present authors have conducted characterization of zincate films formed as a pretreatment for electroless nickel-phosphorus coatings on commercial pure aluminum substrate (JIS A1050P-H24, 99.5 mass%Al). By using a basic solution which consisted of sodium hydroxide and zinc oxide, a zincate film formed by single zi…
Abstract Surface‐enhanced Raman spectra (SERS) are presented for two water‐soluble, donor–donor‐ or donor–acceptor‐substituted phenylene vinylene derivatives adsorbed on the surfaces of colloidal silver nanoparticles. The normally water‐insoluble, substituted stilbene and distyrylbenzene chromophores have been modifie…
This paper presents a study that uses gel permeation chromatography (GPC) to characterize the aging process of blends of aged crumb rubber–modified (CRM) binders containing rejuvenating agents. Two aging processes proposed by SHRP binder specifications—rolling thin-film oven (RTFO) and RTFO + pressure-aging vessel (PA…
Afin d'assurer la durabilite de l'industrie du papier recycle, il faut trouver des solutions de remplacement economiquement viables et respectueuses de l'environnement qui permettent de reutiliser les dechets. L'une de ces solutions est l'integration de ces residus dans un produit a valeur ajoutee. Dans la presente co…
Stress corrosion cracking (SCC) is one of the major reasons to reduce the reliability of aged reactor components. Toshiba has been developing underwater laser welding onto surface of the aged components as maintenance and repair techniques. Because most of the reactor internal components to apply this underwater laser…
In this Feature Article, we discuss our work on the Jahn–Teller isomers in a single molecule magnet, [Mn12O12(RCO2)16(H2O)4] (abbreviated as Mn12R), and the magneto-structural correlation between them. Mn12R derivatives always exhibit two peaks at 5 and 2 K in the temperature dependence of the imaginary component of t…
To reach its ultimate potential, photovoltaics has to attain costs that are sufficiently low for solar-generated electricity to compete with wholesale electricity prices. To do so requires not only low-cost, thin-film approaches but also high energy conversion efficiency to offset unavoidable area-related material and…
Mechanical activation was used as a method for modification of the structural and optical properties of commercial ZnO powder. For this purpose zinc oxide powder was mechanically treated by grinding in a high-energy vibro-mill in a continual regime in air up to 300 minutes. Starting and modified ZnO samples were chara…
Novel polyimide‐silica nanocomposites with interphase chemical bonding have been prepared using the sol‐gel process. The morphology, thermal and mechanical properties were studied as a function of silica content and compared with the similar composites having no interphase interaction. The polyimide precursors, polyam…
Polycatenar 1-imidazole amphiphiles, consisting of a 1-imidazole head connected through a benzene ring to a trialkyloxyphenyl tail, were synthesized and their self-assembling properties investigated. The H NMR and fluorescence spectroscopy studies showed that in nonpolar solvents, the amphiphiles formed reverse micell…
Small additions of boron to conventional titanium alloys have been found to produce significant changes to the microstructures and associated properties. Grain refinement and improved strength and stiffness are first-order effects, which lead to possibilities for developing novel and affordable processing methodologie…
Stretch woven fabrics are widely used because of their good elongation and recovery (residual extension) properties. Several parameters and test method are used to measure the properties of these fabrics. Each different set of test parameters means a different test application. Sometimes, repeating tests for different…
Abstract The production of active semiconductor thick-film components typically involves the deposition of precursor materials and subsequent thermal processing to produce a massive semiconductor layer. In this paper, we present electronic materials, based on nanoparticulate silicon, to produce the active semiconducti…
Biomolecules have been encapsulated in silica microparticles for controlled release applications, by destabilisation of aqueous silica precursors in the water droplets of a water-in-oil emulsion. The use of colloidal solutions (colloids typically in the size range 6–20 nm) as silica precursors avoids the detrimental e…
We report a new method of low temperature removal of template from SBA-15 by KMnO4 chemical oxidation. Using this silica as template, mesoporous carbon with thick pore walls and relatively small mesopores can be cast. The results from XRD and nitrogen sorption show that the silica obtained after surfactant removal has…