Materials Literature
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Abstract Tris(β‐diketonato)europium( III ) with a series of variably fluorinated ligands derived from 3,5‐heptanedione were synthesised with the aim of determining their hydration state under extraction conditions. The number of coordinated water molecules was determined by measuring the lifetime of the Eu( 5 D 0 ) ex…
The contrast mechanism for scanning electron microscopy images of single-walled carbon nanotubes (SWNTs) is studied for samples on various substrates using low voltage scanning electron microscopy (LVSEM). We show that the contrast of SWNT images is greatly affected by a charging effect, where the brightness strongly…
Polycrystalline double perovskite Sr 2 FeMoO 6 samples were synthesized by a wet chemistry method under controlled reduction conditions. Single-phase 'bulrush-like' samples of grain size about 110 nm in width and >2 µm in length were readily obtained at temperatures as low as 950 °C, and they showed a large room-tempe…
One-step synthesis of 3D dendritic gold/polypyrrole nanocomposites via a self-assembly method, Huang, Kun, Zhang, Yuanjian, Han, Dongxue, Shen, Yanfei, Wang, Zhijuan, Yuan, Junhua, Zhang, Qixian, Niu, Li
We have developed an electrically-driven flexible polymer microcavity with green- or red-emitting polymer sandwiched between the 3M multilayer flexible polymer distributed Bragg reflector and the aluminum mirror. The nearly all-polymeric flexible planar polymer microcavity of a Fabry-Perot resonator is fabricated by e…
A series of nano-hybrid light emitting dots with diameter range from 2 nm to 4 nm were synthesized through grafting organic conjugated chains directly onto an inorganic rigid cage polyhedral oligomeric silsesquioxanes (POSS). The effect of chain length, side groups, polarity of solvents on the property of light emitti…
Despite the promising field emission properties, as-grown carbon nanotubes (CNTs) are far from perfect and need improvement. We report on the field electron emission properties of hafnium coated CNTs. The result shows hafnium carbide (HfC) can be formed on the surface of CNT films at an annealing temperature of 1200 °…
A comprehensive set of interatomic potential parameters for modeling natural apatite crystals is presented. These potentials build on those previously used in research on apatites with new potentials fitted empirically to crystal structures and their properties using the GULP program. We demonstrate that the new poten…
The high-pressure behavior of fully intercalated lithium cobaltite, ${\mathrm{LiCoO}}_{2}$, has been investigated by angle-dispersive synchrotron x-ray powder diffraction and Raman spectroscopy. The layered structure $(R\overline{3}m)$ is found to exist up to at least $26\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. From…
Fullerene nanomesh: Fullerene islands with rectangular shapes organize themselves on a vicinal gold surface in an extraordinarily well-ordered mesh with unprecedented periodicity and low defect density (see Figure). This adsorbate system is a promising candidate for guiding subsequent deposition of functional units.
Based on a simple low-temperature chemical-solution method, multiwalled carbon nanotubes (MWCNTs) are coated discontinuously with a alumina gate-dielectric shell (see Figure) and application as p-type field-effect transistors is demonstrated. With a coating thickness of 8 nm, the drain current exceeds the gate current…
Effects of intertube interactions on transport are studied numerically in incommensurate double-wall carbon nanotubes. The intertube transfer at each lattice site oscillates around zero in a complex plane as a function of position in a quasiperiodic manner and therefore cancels each other when being summed up. The can…
Abstract Summary: The grafting of two hydrophilic vinyl monomers, dimethylaminoethyl acrylate (DMAEA) and dimethylaminoethyl methacrylate (DMAEMA), onto natural rubber latex was carried out by emulsion polymerization using redox initiation. The effects of the redox initiator concentration and type (cumene hydroperoxid…
Using a renormalization group approach, we determine the phase diagram of an extended quasi-one-dimensional electron gas model that includes interchain hopping, nesting deviations, and both intrachain and interchain repulsive interactions. We find a close proximity of spin-density- and charge-density-wave phases and s…
In this paper, we present a novel hybrid numerical-analytical modeling method that is capable of predicting viscoelastic behavior of multiphase polymer nanocomposites, in which the nanoscopic fillers can assume complex configurations. By combining the finite element technique and a micromechanical approach (particular…
Collagen is a well known protein component that has the capacity to mineralize in a variety of vertebrate tissues. In its mineralized form, collagen potentially can be utilized as a biomimetic material for a variety of applications, including, for example, the augmentation and repair of damaged, congenitally defective…
Abstract Single‐walled carbon nanotubes (SWNTs) are recognized as the ultimate carbon fibers for high‐performance, multifunctional composites. The remarkable multifunctional properties of pristine SWNTs have proven, however, difficult to harness simultaneously in polymer composites, a problem that arises largely becau…
Abstract The effects of particle size and surface treatment of CaCO 3 particles on the microstructure and mechanical properties of poly(vinyl chloride) (PVC) composites filled with CaCO 3 particles via a melt blending method were studied by SEM, an AG‐2000 universal material testing machine and an XJU‐2.75 Izod impact…
A description of dislocations and disclinations defects in terms of Riemann--Cartan geometry is given, with the curvature and torsion tensors being interpreted as the surface densities of the Frank and Burgers vectors, respectively. A new free energy expression describing the static distribution of defects is presente…
The mixed-alkali effect in the cation dynamics in silicate glasses is analyzed via molecular dynamics simulations. Observations suggest a description of the dynamics in terms of stable sites mostly specific to one ionic species. As main contributions to the mixed-alkali slow down longer residence times and an increase…