Materials Literature
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Individual graphene oxide sheets subjected to chemical reduction were electrically characterized as a function of temperature and external electric fields. The fully reduced monolayers exhibited conductivities ranging between 0.05 and 2 S/cm and field effect mobilities of 2-200 cm2/Vs at room temperature. Temperature-…
Structural information on nanometer-sized gold particles has been limited, due in part to the problem of preparing homogeneous material. Here we report the crystallization and x-ray structure determination of a p-mercaptobenzoic acid (p-MBA)-protected gold nanoparticle, which comprises 102 gold atoms and 44 p-MBAs. Th…
We report a method to form multifunctional polymer coatings through simple dip-coating of objects in an aqueous solution of dopamine. Inspired by the composition of adhesive proteins in mussels, we used dopamine self-polymerization to form thin, surface-adherent polydopamine films onto a wide range of inorganic and or…
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.
Growth modes of single wall carbon nanotubes are investigated during chemical vapor deposition within an environmental transmission electron microscope and in furnace reactors at different gas pressure and flow conditions. The nanotube pivoting observed by in situ microscopy can be explained by dynamic catalyst crysta…
Crack healing has great effect on monotonic strength of ceramics. Also the crack-healing effect on fatigue behavior is an interesting issue. Three kinds of Al 2 O 3 /30 vol.% SiC composites that have differences in crack-healing ability and fracture toughness were hot pressed. Static fatigue behaviors of these crack-h…
Abstract This communication describes the morphology and DC conductivity of poly( N ‐vinylcarbazole) (PNVC)/multi‐walled carbon nanotubes (MWCNTs) nanocomposite. The nanocomposite has been synthesized by solid state in situ polymerization of N ‐vinylcarbazole (NVC) monomer in the presence of MWCNTs at an elevated temp…
Abstract The morphology of a thin film was studied for a binary mixture of asymmetric PS‐ b ‐PMMA block copolymers on a flat silicon wafer coated with 50 nm thick silicon oxide. AFM and TEM reveal that the PMMA cylinders orient perpendicular to the substrate by tuning the film thickness. Furthermore, grating substrate…
The effect of annealing heat treated temperature, loading rate, environmental temperature, repeated loading cycle on the phase transformation and thermo-mechanical behaviors of shape memory alloy is investigated through a DSC test and a thermo-mechanical test. Shape memory alloy wire with the diameter of 1.1 mm is use…
The structure, the ionic transport properties, and the dynamics of long-wavelength charge-density fluctuations, for two polarizable point dipole models of molten NaI, have been studied by molecular dynamics simulations. These models are based on a rigid ion potential to which the induced dipole polarization of the ani…
The aim of this paper is to review and to preview some selected topics of crystal nucleation in colloidal suspensions. First we discuss how the structure of critical nuclei can be calculated by computer simulations, in particular how linear shear flow affects the size and shape of the critical nuclei. Second, we previ…
We report an optical spectroscopy study on the newly discovered superconductor Cu0.07TiSe2. Consistent with the development from a semimetal or semiconductor with a very small indirect energy gap upon doping TiSe2, it is found that the compound has a low carrier density. Most remarkably, the study reveals a substantia…
Abstract For the size reduction of electric power equipment, the electric field stress around solid insulators is to be carefully designed. This concern will be solved by the application of FGM (Functionally Graded Materials). In this paper, we investigated an application feasibility of FGM from numerical simulation,…
We have used phase field simulations to study elastic stress-driven phase inversion in which an initial microstructure with a minority phase embedded in a majority phase evolves to one in which the latter becomes embedded in the former. Such phase inversion is possible if the majority phase is elastically stiffer than…
In this article biaxial constrained recovery in a thick-walled shape memory alloy (SMA) ring with a rectangular cross-section is modeled using the theory of generalized plasticity, which is developed by Jacob Lubliner and Ferdinando Auricchio. As a mechanical obstacle that delays free recovery in a SMA ring, a steel r…
Self-crack-healing by oxidation of silicon carbide (SiC) is the most effective method to improve the reliability of ceramics, as this eliminates surface cracks completely. Furthermore, if the service condition corresponds to the state under which self-crack-healing can occur, cracks introduced during service can be co…
Flash-cooling of macromolecular crystals often compromises diffraction quality by increasing the mosaicity. In some cases, cycling the crystal between low temperature (LT) and room temperature (RT) can reverse this increase in mosaicity. Previous studies of RT/LT cycling have focused on the quality of the crystal as i…
Abstract Two pyrrole‐deriviatized carboxylic acids [ L 1 = 1‐methylpyrrole‐2‐carboxylate] and [ L 2 = N ‐methyl‐3‐indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [( L 1 ) 3 Ln] n (Ln = Eu, 1 ; Gd, 2 ; Tb, 3 ) and [( L 2 ) n Ln(NO 3 )(MeOH) 2 ] n (Ln = Eu, 4 ; Gd, 5 ; Tb, 6 ). Th…
Abstract The morphology transitions in AB diblock and ABA triblock copolymers confined between flat and curved surfaces were investigated by MC simulations. Upon variation of the extent of frustration between thickness d and bulk lamellae period L 0 , parallel and vertical or distorted vertical lamellar structures app…
Magnetoelectric CoFe(2)O(4)-Pb(Zr,Ti)O(3) nanostructured films with various phase connectivity patterns were prepared by a pulsed laser deposition method. It was found that the microstructure as well as the phase connectivity pattern of the film varied remarkably with the variation of phase content ratio. All composit…