Materials Literature
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${\mathrm{E}\mathrm{r}}_{5}{\mathrm{S}\mathrm{i}}_{4}$ is a member of the ${R}_{5}({\mathrm{S}\mathrm{i}}_{4\ensuremath{-}x}{\mathrm{G}\mathrm{e}}_{x})$ family of alloys, where $R=\mathrm{r}\mathrm{a}\mathrm{r}\mathrm{e}$ earth metal. Many of these compounds display a strong coupling between the magnetic and crystal l…
We have used a kinetic model to investigate the influence of changing the pressure (0.1–0.8 Torr) and power (100–300 W) on the non-equilibrium plasma chemistry of RF (13.56 MHz) produced C 2 H 2 (1%)/H 2 /Ar plasmas of interest for the synthesis of nanodiamond thin films. We found that the concentrations of the specie…
Using ab initio calculations, we have studied the influence of optical activation on functionalization reactions of silicon quantum dots with unsaturated hydrocarbons. We find that the energy barrier for the replacement of silicon-hydrogen with silicon-carbon bonds is dramatically reduced if the silicon dot is optical…
Heteronuclear NMR relaxation measurements and hydrogen exchange data have been used to characterize protein dynamics in the presence or absence of stabilizing solutes from hyperthermophiles. Rubredoxin from Desulfovibrio gigas was selected as a model protein and the effect of diglycerol phosphate on its dynamic behavi…
Corn gluten meal (CGM)/wood fiber composites, plasticized by glycerol, water and ethanol, were extruded into pellets, and then the pellets were compression-molded into sheets for evaluation of water resistance, thermal stability and morphology. Pellets were also injection-molded to prepare plant pots for developing lo…
Several experiments were performed to compare the in vitro adhesion of human macrophage and granulocyte inflammatory cells to polyethylene terephthalate substrate and the same coated with a phosphorylcholine (PC)-based polymer. The inclusion of various types of serum at different stages in the assay indicated that pro…
The stability of the native structure of globular proteins is known to be affected strongly by a variety of substances that act at high concentration (usually ≥1 M ). We will refer to these as co-solvents, whether they are liquids or solids. Some of these substances are known to stabilize protein structure, others to…
High- T g yet mechanically robust polymers are desirable but difficult to realize. To explore whether the insertion of a motionally active molecular entity in the backbone could produce polymers with both high T g and yet are not brittle, three series of high- T g glassy polycarbonates/polyesters/poly(ester carbonate)…
The transformation of the micro-domain structure of polyimide films during thermally induced chemical conversion from the polyamic acid prepared from 3,3‘,4,4‘-diphenyl tetracarboxylic dianhydride and p -phenylene diamine, also in the presence of triphenyl phosphate, is studied with a transmission electron microscope.…
The dilation of polycarbonate (PC), poly(vinyl acetate) (PVAc), and poly(ether urethane) (PEUT), induced by acetonitrile sorption at 40 °C, was studied using FTIR-ATR spectroscopy. Results compared well to those obtained through direct observation of volumetric changes using a CCD camera. Polymer dilation and penetran…
Exfoliated graphite (EG) is prepared by the thermal exfoliation of graphite intercalation compounds at different temperatures. Surface and bulk physicochemical properties of EG are followed by spectroscopic and analytical methods and are observed to be a function of exfoliation temperature. EG particles can be recompr…
A graphene sheet is well known to be highly stable against chemisorption of a single hydrogen atom, since a puckered ${\mathrm{sp}}^{3}$ hybridized site heavily distorts the surrounding ${\mathrm{sp}}^{2}$ framework. However, successive adjacent chemisorbed hydrogen atoms can engage in a collective stabilization media…
We report on the adsorption from solution of a family of triblock copolymers, copoly(ethylene oxide−propylene oxide−ethylene oxide) (PEO−PPO−PEO), on a gold surface modified by a methyl-terminated, self-assembled monolayer (SAM) of a long-chain alkanethiol (CH 3 (CH 2 ) 10 SH). We employed a surface plasmon resonance…
Organ transplantation has been successful since the early 1960s as a result of the success in immunologic suppression in the clinical setting ( 1 ), and has saved, and is continuing to save, countless lives, but is far from a perfect solution to tissue losses or organ failures. By far the most serious problem facing t…
Gas-solid heterogeneous photocatalytic oxidation of aromatic compounds in air was carried out at room temperature with a fixed bed flow reactor. The deposition of Rh on TiO2 catalyst improved the catalyst durability in benzene photooxidation. The Rh deposition reduced the amounts of carbonaceous materials on the catal…
We have investigated the structures of copper nanowires encapsulated in carbon nanotubes using a structural optimization process applied to the steepest descent method. The results showed that the stable morphology of the cylindrical ultrathin copper nanowires in carbon nanotubes is multishell packs consisting of coax…
The effects of single-walled carbon nanotubes on the polymerase chain reaction (PCR) were investigated via quantitative PCR product measurements, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The results showed that adding single-…
Isothermal−isobaric (NPT) molecular dynamics simulation has been performed to investigate the layering behavior and structure of nanoconfined quaternary alkylammoniums in organoclays. This work is focused on systems consisting of two clay layers and a number of alkylammoniums, and involves the use of modified Dreiding…
Natural selection is believed to be an unforgiving and relentless force in the evolution of life on earth. An organism that cannot adapt to a changing environment or an environment hostile to cell functions is at risk as a species. So it is important to understand the mechanisms used by plants, animals, and microorgan…
Novel organic solar cells prepared using quaternary self-organization of porphyrin (donor) and fullerene (acceptor) dye units by clusterization with gold nanoparticles on SnO2 electrodes exhibit the remarkable enhancement of the photoelectrochemical properties relative to the reference systems.