Materials Literature
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The title compound, [Co(C6H4NO2)2(NO2)(H2O)], displays O—H⋯O hydrogen bonds, leading to the formation of a two-dimensional network structure. Interestingly, the oxidation and decomposition of α-pyridoin and the auto-redox reaction of cobalt nitrate occurred during the reaction process.
The nature of the melting transition for a system of hard discs with translational degrees of freedom in two spatial dimensions has been analysed by a combination of computer simulation methods and a finite size scaling technique. The behaviour of the system is consistent with the predictions of the Kosterlitz–Thoules…
A novel method for studying the impurity distribution coefficient in protein crystals was proposed. We observed the impurity distribution in a crystal by a fluorescence method. Conventional electrophoresis can only provide the average effective distribution coefficient ( K eff ) of the whole crystal, but the fluoresce…
Accurate crystal structure analysis at high temperatures is an important challenge in science and technology. A new electric furnace for the measurement of high-resolution (δ d / d = 0.03%) synchrotron radiation powder diffraction profiles from materials at high temperatures (up to 1900 K in air) has been designed and…
Hyperbranched methacrylates were synthesized by self-condensing group transfer polymerization (SCGTP) of 2-(2-methyl-1-triethylsiloxy-1-propenyloxy)ethyl methacrylate (MTSHEMA) and characterized by multidetector SEC and 13 C NMR. Depending on the reaction conditions, molecular weights up to M w = 38 000 at a polydispe…
Hydrogen adsorption measurements on mixed carbon material containing single-walled carbon nanotubes (SWNTs) obtained by the electric-arc method were carried out by three different techniques: a volumetric system, a gravimetric system and an electrochemical method. The found H 2 gas adsorption capacity (volumetric and…
The crystal structure and melting transition of two-dimensional colloids interacting via an anisotropic magnetic dipole–dipole potential are studied. Anisotropy is achieved by tilting the external magnetic field inducing the dipole moments of the colloidal particles away from the direction perpendicular to the particl…
We study the effect of shear flow on homogeneous crystal nucleation, using Brownian Dynamics simulations in combination with an umbrella sampling like technique. The symmetry breaking due to shear results in anisotropic radial distribution functions. The homogeneous shear rate suppresses crystal nucleation and leads t…
Large, oriented single crystals may be obtained from shear melts of colloidal particles after nucleation at the container walls. We are here interested in the processes occurring during the initial phase of their formation. Using different microscopic and scattering techniques we here studied highly charged suspension…
A high-resolution powder synchrotron X-ray diffraction pattern of the Γ form of D-sorbitol has been recorded at 293 K on the BM1B beamline at the ESRF (Grenoble). The starting model of the structure was found by Monte Carlo simulated annealing. The final structure was obtained through Rietveld refinements performed wi…
The dynamic behaviour of the molecular alignment strongly affects the rheological properties of nematic liquid crystals. The closed nonlinear relaxation equation for the five components of the alignment tensor which was derived within the framework of irreversible thermodynamics and also inferred from a generalized Fo…
Abstract A fast and environment-friendly green microwave-heating route to synthesize flower-like ZnO nanosheet aggregates in a room-temperature ionic liquid has been reported. SEM images showed the nanosheets with uniform 50 nm in thickness. The PL spectrum of ZnO nanosheet aggregates exhibits a weak ultraviolet emiss…
The segmental dynamics of amorphous poly(dimethylsiloxane) (PDMS) in a lamellar poly(styrene)−poly(dimethylsiloxane) diblock (PS−PDMS) is investigated by means of broadband dielectric spectroscopy. Because of the absence of normal mode in PDMS, we have been able to analyze the low-frequency side of the α-relaxation in…
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTFormation of Helical Hybrid Silica BundlesYonggang Yang, Miho Nakazawa, Masahiro Suzuki, Mutsumi Kimura, Hirofusa Shirai, and Kenji HanabusaView Author Information Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Ueda…
A mesostructured hollow sphere form of carbon can be synthesized by using mesocellular foam (MCF) silica as template. A carbon structure composed of spherical hollows with closed walls and with mesopores of around 4 nm in diameter was prepared by the two-step impregnation of sucrose and successive carbonization under…
A rigid body boundary layer interface force (RIF) model for stress calculation on the nanoscale is proposed in this paper for calculating stress based on molecular dynamics. The RIF model is used to study the stress–stain behaviour when nanoscale single crystal copper is under uniaxial tension, and is used for 15 tens…
The scattering function for Schulz–Flory distributed spherical core–shell particles is derived analytically. A constant ratio of core to shell radii is assumed. The analytical expression, which does not require any numerical integration, provides a fast way to model experimental data by nonlinear least-squares fitting…
Abstract Single-crystalline CuO nanoleaves with an average thickness of about 10 nm and with lateral sizes of hundreds of nanometers to several micrometers have been successfully synthesized by microwave-heating of an aqueous solution containing copper salt and sodium hydroxide. CuO nanoleaves were characterized by po…
By using Monte Carlo simulations in the grand canonical ensemble we investigate the bulk phase behaviour of a model colloid–polymer mixture, the so-called Asakura–Oosawa model. In this model the colloids and polymers are considered as spheres with a hard-sphere colloid–colloid and colloid–polymer interaction and a zer…
In a previous study, we have reported chemical synthesis of novel aliphatic poly(butylene succinate-co-cyclic carbonate) P(BS-co-CC)s bearing various functionalizable carbonate building blocks, and this work will continue to present our new studies on their enzymatic degradation and in vitro cell biocompatibility assa…