Materials Literature
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Interesting in generation and exploration of mid-infrared radiation has induced using optical parametric effect in nonlinear optical crystal with high nonlinearity, high transmission, phase-matching ability, and high sensitivity in room temperature, such as AgGaSe<sub>2</sub>(AGSe), AgGaS<sub>2</sub>(AGS) crystals. To…
The latest data concerning the modification of polymers containing phenylquinoxaline cycles and the manufacture of polymer materials on their basis are systematized. It has been shown that the design of silicon-and fluorine-containing and sulfated poly(phenylquinoxalines) makes it possible to significantly improve the…
Three new photochromic diarylethenes bearing cyano groups at the ortho -, meta -, or para -positions of both terminal phenyl rings, namely 1,2-bis(2-methyl-5-(2-cyanophenyl)-3-thienyl)perfluorocyclopentene ( 1a ), 1,2-bis(2-methyl-5-(3-cyanophenyl)-3-thienyl)perfluorocyclopentene ( 2a ), and 1,2-bis(2-methyl-5-(4-cyan…
Perovskite-type $\mathrm{Bi}\mathrm{Ni}{\mathrm{O}}_{3}$ is an insulating antiferromagnet in which a charge disproportionation occurs at the Bi site. La substitution for Bi suppresses the charge disproportionation and makes the system metallic, and for $0.05\ensuremath{\le}x\ensuremath{\le}0.1$ a broad metal-insulator…
Colitose is a dideoxysugar found in the O-antigen of the lipopolysaccharide that coats the outer membrane of some Gram-negative bacteria. Four enzymes are required for its production starting from D-mannose-1-phosphate and GTP. The focus of this investigation is GDP-4-keto-6-deoxy-D-mannose 3-dehydratase or ColD, whic…
Lu and Steinhardt (Reports, 23 February 2007, p. 1106) claimed the discovery of a large, potentially quasi-crystalline Islamic tiling in the Darb-i Imam shrine but regard the earlier Maragha tiling, previously described as quasiperiodic, as a small isolated motif. We demonstrate that the Darb-i Imam pattern is periodi…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A simple method to prepare large areas of polycarbonate (PC) alignment layers with a high degree of polymer chain orientation, a periodic and oriented nanoscale pattern, and a controlled surface roughness is presented. The method involves three steps: (i) the preparation of a film of bisphenol A polycarbonate in its g…
In this paper, the introduction of both a methionine residue and a nitrobenzyl derivative as a labile linker between the peptide part and the hydrophobic alkyl chain of a peptide amphiphile are presented. These modifications are shown not to inhibit the formation of structured assemblies that analogous peptide amphiph…
A dynamic model of a solid-oxide fuel cell (SOFC) of 100 KW capacity has been developed with a control action associated with it for application in distributed power generation. The SOFC system is chosen as a distributed energy resource (DER) because of its ability to tolerate relatively impure fuels. It also can be o…
Multilayer structures of alternating thin titanium and tungsten oxide layers having dimensions of ∼20 nm have been fabricated from titanium alkoxide and various tungstate precursor solutions using the dip coating technique. Single, double, and triple layer titanate and tungstate thin films were deposited on silicon su…
Aligned nanocables, consisting of CuO nanowire cores and lipid nanotube shells, are prepared by sheathing an aligned array of CuO nanowires with a self-assembled tubular glycolipid (see figure). The sheath thickness of the nanocable is tunable by changing the incubation temperature of the lipid on the CuO nanowire.
Platinum (Pt) nanocrystals with special surfaces attract much attention in the field of chemistry because the surface structure plays a vital role for the activity and selectivity of Pt catalyst. The surface evolution of Pt nanocrystals is closely related with facet growth, which depends on not only the oxidizing prop…
Perovskites, with exclusive selectivity for oxygen over nitrogen, offer significant promise as potential high temperature adsorbents for air separation. Results from fixed bed, breakthrough experiments at 500 °C on two perovskite samples having compositions SrCo 0.5 Fe 0.5 O 3- δ and La 0.1 Sr 0.8 Ag 0.1 Co 0.5 Fe 0.5…
Taking into account both curvature and disorder, we study the magnetic moments of carbon nanotori in the presence of magnetic field B (perpendicular to the torus plane). Due to the intrinsic curvature effect, energy gaps of about 10 meV are obtained in those primary metallic carbon nanotori, which result in a novel ma…
A fast electrochemical replication technique has been developed to fabricate large-scale ultra-smooth aluminum foils by exploiting readily available large-scale smooth silicon wafers as the masters. Since the adhesion of aluminum on silicon depends on the time of surface pretreatment in water, it is possible to either…
The interactions of CH 4, CO, and CH 4 /O 2 with Ni/Al 2 O 3 catalysts were examined by the pulse reaction technique and the transient response technique. The adsorption and dissociation of CH 4, CO, CH 4 /CO 2, and CH 4 /O 2 on nickel alumina catalysts were also extensively investigated by temperature-programmed hydr…
Abstract High‐field transport properties of ZnO and ZnO/ZnMgO heterostructures were investigated. Three types of structures, a 500‐nm‐thick ZnO and ZnO/ZnMgO single‐hetero‐ (SH) and single‐quantum‐well (SQW) structures containing a thin (10‐20 nm) ZnO channel layer, were grown on a‐plane sapphire substrates by plasma‐…
A photo-thermoelectric technique was employed to perform anisotropic thermal diffusivity measurements in nanocomposites and multilayer structures. In this technique a thermal wave is produced into the specimen by absorption of modulated laser radiation while the thermal wave is detected using a fast thermoelectric eff…
Single crystals of the anhydrate and hydrate [4-OH-BZA + H 2 O] with 1:1 stoichiometry of 4-hydroxybenzamide (4-OH-BZA) were grown, and their structures were solved by X-ray diffraction methods. Furthermore, the temperature dependence of the vapor pressure of the anhydrate phase was obtained, and the thermodynamic par…