Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The aim of this paper is twofold: first to report on the lateral and vertical characterisation of a surface chemical gradient of carboxylic‐acid functionality and second, to demonstrate the use of said gradient to probe the passive adsorption of immunoglobulin G (IgG) as a function of the density of surface c…
The structural flexibility and efficacy of thiourea−amine catalysts for the supramolecular activation and ring-opening polymerization (ROP) of lactide are described. The nature of the hydrogen bonding group and its strength as well as the steric congestion have been altered, leading to shorter polymerization times, be…
We describe a promising and flexible technique for fabricating uniform nonspherical particles with anisotropic phase and surface properties. Our approach is based on the seeded polymerization technique in which monomer-swollen particles are polymerized. The polymerization causes a phase separation to occur, giving ris…
A tight-binding model is used to calculate the band structure of bilayer graphene in the presence of a potential difference between the layers that opens a gap $\ensuremath{\Delta}$ between the conduction and valence bands. In particular, a self-consistent Hartree approximation is used to describe imperfect screening…
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.
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.
Abstract Poly(trimethylene terephthalate) (PTT) was prepared by the ring‐opening polymerization of its cyclic dimer. Antimony(III) oxide, titanium(IV) butoxide, dibutyltin oxide, and titanium(IV) isopropoxide were used as catalysts. Among the catalysts, titanium(IV) butoxide was the most effective for the same reactio…
We investigate charge pumping in semiconducting carbon nanotubes by a travelling potential wave on the surface of a piezoelectric quartz substrate. We estimate the magnitude and profile of the potential wave as its passes the nanotubes and show how this results in the pumping of charge in packets. By tuning the potent…
The present work reports isothermal gas/solid equilibration kinetics for Nb-doped TiO(2) (0.65 atom %) at elevated temperatures (1073-1298 K) within narrow ranges of oxygen activity spanning between 10(-13) Pa and 75 kPa. The equilibration kinetics were monitored using electrical conductivity measurements. The kinetic…
Abstract Dense, lead‐free ceramics with composition of (K 0.5 Na 0.5 ) 0.96 Sr 0.02 Nb 1– x Mn x O 3 ( x = 0, 0.01, 0.02, 0.03, 0.04) were successfully prepared by a conventional mixed‐oxide method. The X‐ray diffraction patterns revealed pure peroveskite structure after Mn doping as compared to the original compositi…
We introduce a robust and efficient methodology to solve the Ornstein-Zernike integral equation using the pseudoarc length (PAL) continuation method that reformulates the integral equation in an equivalent but nonstandard form. This enables the computation of solutions in regions where the compressibility experiences…
Phytochemical screening of the roots of Gomphrena macrocephala, with particular attention to its triterpene glycoside constituents, has resulted in the isolation of two new oleanane glycosides (1 and 2) and a new taraxerane glycoside (3). The structures of 1-3 were determined as 11alpha,12alpha-epoxy-3beta-[(O-beta-D-…
The basic science in quantum transport of nano-scaled 'devices' is largely based on the availability of suitable model systems . Nanostructures built from conventional metals are typically in the diffusive transport regime. Semiconductors, as the starting material for nanodevices, are different. Because of the low car…
Density functional theory is employed to study Pd and Pd/Ni alloy monatomic chain-functionalized metallic single walled carbon nanotubes (SWNT(6,6)) and semiconducting SWNT(10,0), and their interactions with hydrogen molecules. The stable geometries and binding energies have been determined for both isolated chains an…
Reaction of two transition metal cations M (M = V V , Fe III ) on the open Wells–Dawson anion α-[{K(H 2 O) 2 }Si 2 W 18 O 66 ] 15– leads to dinuclear and tetranuclear complexes, respectively. The molecular anions [{KV 2 O 3 (H 2 O) 2 }(Si 2 W 18 O 66 )] 11– and [{Fe 4 (OH) 6 }(Si 2 W 18 O 66 )] 10– have been structura…
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.
The physicochemical and mechanical properties of amine-terminated covalently bound poly(ethylene glycol) (PEG) layers are dependent on fabrication methods. In particular, the use of a ϑ solvent yields dense polymer layers with properties not well described by traditional models. Light diffraction techniques were used…
Jewel-box: In a hierarchical process, three molecules of a calix[4]arene (blue) and six of barbituric or cyanuric acid (green) assemble into double-rosette boxes, which assemble into columns, which in turn assemble into columnar liquid-crystalline phases (see picture). The resulting mesophases have a remarkable therma…
Modulierbar: Optisch reversibel schaltbare fluoreszierende Verbindungen wurden synthetisiert, deren sichtbare Fluoreszenz mit Licht der Wellenlänge 360–400 nm bis auf 6 % unterdrückt und dann mit rotem Diodenlaserlicht wiederhergestellt werden kann. Die fluoreszierenden Schalter bieten Möglichkeiten für die Datenspeic…
In a stable condition: Oxyhydroxide colloids of chromium deposited on silica gel are selective, stable catalysts for the autoxidation of cyclohexane (CyH). The CrIII colloids, generated in situ, are immobilized by a column precipitation chromatographic technique (see picture). An increased yield of cyclohexanone (QO)…