Materials Literature
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The development of a continuous process for supercritical fluids is desirable for high-pressure technology. In a previous study, it was revealed that a twin-screw extruder was applicable as the reactor and feeder for industrial supercritical fluid processes (Goto, T.; et al. Ind. Eng. Chem. Res . 2011, 50, 5661–5666).…
Viscosity effects on the kinetics of complex solution processes have proven hard to predict. To test the viscosity effects on protein aggregation, we use the crystallization of the protein glucose isomerase (gluci) as a model and employ scanning confocal and atomic force microscopies at molecular resolution, dynamic a…
A new model for solid skin formation on submicrocellular foams based on PMMA is presented. Structural foams has been produced by the solid state foaming technique using as precursor material a blend of poly (methyl methacrylate) PMMA and a triblock copolymer [poly (methyl methacrylate)-block poly (butyl acrylate)-bloc…
Various processing routes were applied to as-cast magnesium during equal channel angular pressing with back-pressure (BP) at room temperature (RT). Multiple passes with BP resulted in crack-free microstructures independent of the processing route. Microstructure and texture examination by electron backscatter diffract…
Flache Porenmodelle: Dünne, wohldefinierte Aluminosilicatfilme mit tetraedrischen [SiO4/2]- und [AlO4/2−]-Struktureinheiten, die schwach an eine Metallunterlage gebunden sind, enthalten stark saure, verbrückende OH-Gruppen, die einen H-D-Austausch zeigen (siehe Bild; Si gelb, O rot, Al grau, C schwarz, H weiß). Die Fi…
Surface modification of biomaterials has been highlighted by biomedical engineers as a facile method for improving cell-biomaterial interactions without the expense and time required to develop new materials. In the present study, we investigated the influence of ion-etching on the surface characteristics of chitosan…
Heavy metals released into the environment continue to receive attention over with advances of technology, but with variations in concentration. Heavy metals released into the environment in various concentrations continue to receive attention, fostered by advances in technology. Lead, one of the best-known heavy meta…
In this study, two novel phthalonitrile derivatives were firstly prepared starting from 4‐nitrophthalonitrile: substitution of the nitro group with 3‐mercaptopropionic acid and 4‐mercaptobenzoic acid gave two precursors, namely, 4‐(carboxyethylsulphanyl) phthalonitrile and 4‐(carboxyphenylsulphanyl)phthalonitrile. Zin…
Abstract In recent years, environmentally friendly materials have become popular because of the growing environmental demands in human society. Natural fibers are now widely used as reinforcements in polymer matrix composites for their various advantages such as low cost, light weight, abundant resources, and biodegra…
Ti-6Al-4V is the most used of titanium alloy and presents some important properties as metallurgical stability, high specific strength, corrosion and creep resistance [. The aim of this study is to evaluate the creep behavior of Ti-6Al-4V alloy with equiaxed and bimodal microstructures and determine the creep paramete…
First principles calculations based on spin-polarized density functional theory were used to identify metallic adatoms that would strengthen the Pt(111)/graphene interface (with a low work of separation of 0.009 J m(-2)), when the adatom was placed between the Pt(111) and the graphene. It was shown that the strength o…
We investigated catalytic activities of strong brønsted acids for dehydration polycondensations of dicarboxylic acids and diols, which were carried out at low temperature (<100 °C) under reduced pressure (0.3-3 mmHg). Strong Brønsted acids, bis(perfluoroalkanesulfonyl)imide and perfluoroalkanesulfonic acid, showed hig…
A novel crystal-growth system and morphology control of ZnO are achieved by using cetyltrimethylammonium chloride (CTAC), a general surfactant, in a new role. We synthesize ZnO via the layered hydroxide zinc acetate (LHZA) in ethanolic-aqueous zinc acetate solution. The CTAC surfactant plays three roles in the nucleat…
We have investigated the charge-ordered state of the quasi-one-dimensional organic charge-transfer salts (TMTTF)${}_{2}X$ (where TMTTF stands for tetramethyltetrathiafulvalene and $X={\text{PF}}_{6}$ AsF${}_{6}$, SbF${}_{6}$, and SCN) by performing comprehensive electron-spin-resonance (ESR) experiments at several fre…
Using density-functional theory within the generalized gradient approximation, we investigate the energetics of oxygen subsurface adsorption governing the onset of bulk oxidation of Cu(100) surface. It shows that the presence of boundaries formed from merged missing-row nanodomains mismatched by a half unit-cell leads…
Abstract In this work, the thermal Alder‐ene functionalization of highly reactive, vinylidene‐terminated, polyisobutene (PIB) with stoichiometric amounts of maleic anhydride at 200 °C was investigated by NMR spectroscopy. The thorough interpretation of the complex NMR spectra of PIB derivatives collected at different…
We report a linear dependence of the phonon splitting $\ensuremath{\Delta}\ensuremath{\omega}$ on the nondominant exchange coupling constant ${J}_{\mathrm{nd}}$ in the antiferromagnetic transition-metal monoxides MnO, FeO, CoO, NiO, and in the frustrated antiferromagnetic oxide spinels ${\mathrm{CdCr}}_{2}{\mathrm{O}}…
High rank order parameters may comprise substantial information about molecular orientational distribution of liquid-crystalline materials. There are few experimental procedures targeted at the determination of high rank order parameters. We suggest a procedure for the determination of order parameters of a spin probe…
The kinetic process of key intermediates involved in the electrochemical ring opening of photochromic dithienylcyclopentenes (DTEs) has been observed for the first time, where the electronic nature of the DTEs is an important factor that determines the rate-determining step in the electrochromism. The dual chromic pro…
The electronic properties of semiconductor quantum dots (QDs) are critically dependent on the nature of the ligand molecules on their surfaces. Here we show the reversible formation of surface electronic trap states in the model system of solid thin films of PbS QDs capped with thiol molecules. As the temperature was…