Materials Literature
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The aqueous corrosion behavior of the GeSe 4 glass composition has been studied over time under various conditions (temperature and pH). The evolution of the surface topography by atomic force microscopy and properties such as surface hardness and reduced modulus, as well as the optical transmission in the 1–16 μm win…
Abstract We have developed procedures for the synthesis of push–pull azo‐chromophores containing the s ‐triazolo[3,4‐ b ]thiadiazole heterocycle compatible with the presence of electron‐acceptor groups (nitrophenyl group) as substituents on both the triazole and thiadiazole rings. The linear and non‐linear optical pro…
Removal by the light: The photochemical regulation of restriction endonucleases, which are important enzymes in molecular biology, has been investigated. Photolabile protecting groups have been installed on DNA substrates and have been demonstrated to inhibit restriction endonuclease activity until removed by UV light…
Bent multiwall carbon nanotubes (CNTs) were grown on silicon substrate by manipulating the direction of the electric field during the growth process in the plasma enhanced chemical vapour deposition system in the presence of hydrogen and acetylene gases. Different geometries of the as-grown nanostructures were employe…
Standing room only: Dense polymer brushes can be prepared by adsorbing a diblock copolymer comprising a neutral block and a polyelectrolyte block to an oppositely charged polyelectrolyte brush (see picture). The density of the resulting neutral brush is determined by charge compensation, leading to brush densities wel…
Small amounts of impurities are always present in the raw materials for the mass production of lead zirconate titanate (PZT) ceramics. In this work, the effects of these impurities on sintering kinetics were investigated. The sintering behavior of PZT ceramics was monitored in situ by a thermo‐optical measuring device…
Homoisocitrate dehydrogenase (HIcDH) catalyzes the Mg2+- and K+-dependent oxidative decarboxylation of homoisocitrate to alpha-ketoadipate using NAD as the oxidant. A recent consideration of the structures of enzymes in the same family as HIcDH, including isopropylmalate and isocitrate dehydrogenases, suggests all of…
γ-LiAlO 2 (100) and sapphire (101̅0) substrates have been employed to grow nonpolar (101̅0) Zn 1− x Mg x O films using metalorganic chemical vapor deposition. Zn 1− x Mg x O films with various Mg contents (0 ≤ x ≤ 0.113) are obtained by adjusting the partial pressure of the Mg metalorganic precursor in gas phase. Mg a…
The finite size effects in nanoribbon graphene field-effect transistors (FETs) make the energy distribution of the channel electrons very different from that when neglecting finite size effects. Such an effect is especially obvious when the width of the graphene ribbon is a few nanometers. Thus, it results in more hig…
The influence of surface roughness on emission site density (ESD) is investigated for nanotube film emitters. An empirical expression for film emitters, [Formula: see text], where B is the intercept in the modified Fowler-Nordheim (FN) plots, A(CNT) the emission area of one site, and C related to the work function, is…
We combine first-principles, statistical, and phenomenological methods to investigate the electronic and dielectric properties of NiO and clarify the nature of the gigantic dielectric response in codoped NiO. Unlike previous models which are dependent on grain-boundary effects, our model based on small polaron hopping…
Passive oxidation of single crystal silicon carbide (6H–SiC) resulted in the formation of a vitreous silica layer which crystallized gradually at temperatures near 1300°–1400°C. During this process, statistically distributed devitrification centers appeared and disk‐like aligned crystal plates (radialites) formed. The…
A novel, simple, and feasible route for synthesizing air‐stable, water‐soluble tantalum precursors has been developed using moisture‐insensitive Ta 2 O 5 as a starting source of the Ta element, based on the conventional basic flux method. Various analytical techniques have been used to characterize the formation mecha…
A hybrid polymer-nanocrystal (NC) light-emitting diode (LED) device with a single active layer structure is simply fabricated by a spin coating. From a high-resolution transmission electron microscopy (HRTEM) study, each PVK polymer particle is observed to be capped with TPBi molecules and CdSe/ZnS NCs are mainly dist…
We report that an achiral particle with anisotropic rigidity can migrate in the vorticity direction in shear flow. A minimal "tetrumbbell" model of such a particle is constructed from four beads and six springs to make a tetrahedral structure. A combination of two different spring constants corresponding to "hard" and…
The temperature-dependent oxidation of Pt nanoclusters on a thin film of Al 2 O 3 on NiAl(100), in the absence of a gaseous oxidizing agent, was investigated with various surface probe techniques. The Pt clusters (of mean diameter 2.2 nm and height 0.4 nm) grown from vapor deposition on the thin film of Al 2 O 3 on Ni…
Abstract The carbon nanotubes/ultrahigh molecular weight polyethlene (CNTs/UHMWPE) conductive composite with a low percolation threshold had been successfully fabricated, and CNTs were only dispersed in the interface of matrix particles. Some factors, including CNTs concentration, processing temperature, and the time…
Dissipative particle dynamics (DPD) is an effective mesoscopic particle model with a lower computational cost than molecular dynamics because of the soft potentials that it employs. However, the soft potential is not strong enough to prevent the DPD particles that are used to represent the fluid from penetrating solid…
Crystal structures of metastable tetragonal Ce x Zr 1− x O 2 have been studied through first principles calculations (0 ≤ x ≤ 1). Unit-cell parameters a, c, and atomic coordinates of 24 atoms were optimized for all the occupational configurations of Ce and Zr atoms by using the constraints for cell parameters: a = b a…
Abstract Finding a suitable plasticizer for polylactide (PLA) is necessary to overcome its brittleness and enlarge its range of applications. In this study, commercial PLA was melt‐blended with a new plasticizer, an ethylene glycol/propylene glycol random copolymer [poly(ethylene glycol‐ co ‐propylene glycol) (PEPG)]…