Materials Literature
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Local lattice and electronic structures in the Fe-As layer of ${\text{SmFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ superconductors were studied by x-ray absorption spectroscopy, the $\text{Fe}\text{ }K$-edge and the $\text{As}\text{ }K$-edge extended x-ray absorption fine-structure, and x-ray absorption near-edge-struc…
A rapid and simple approach to fabricate a large area of nanostructured substrate for surface-enhanced Raman scattering (SERS) is reported. Gold nanoparticles ranging from 10 to 40 nm in diameter uniformly distributed on a silicon substrate were obtained by annealing the gold film precoated on the silicon substrate wi…
All conventional viewing angle switchable liquid crystal displays with pixel division have drawback in light efficiency because the sub-pixel that controls viewing angle does not transmit the incident light at normal direction. In this paper, we propose new viewing angle controllable homogeneously aligned liquid cryst…
Alternating meta - and para -phenylene-linked oligoarylamines are considered as promising molecular parts for the molecule-based electronics and/or spintronics due to their intriguing electronic and magnetic properties. From the magnetic viewpoint, a -meta -phenylene linker plays a crucial role in ensuring the effecti…
The phase morphology, dynamic mechanical, thermal, and crystallization behaviors of poly(trimethylene terephthalate) (PTT)/polycarbonate (PC) blends were studied. The phase morphology of the blends, investigated as a function of the composition, indicated a two-phase structure. Dynamic mechanical thermal analysis (DMT…
We report steady state and dynamic properties of (multi)excitons in InAs quantum dots using femtosecond time-resolved transient absorption and time-resolved terahertz spectroscopy. The polarizability of confined excitons in the ground state is found to be of the order of 10 4 Å 3, increasing sharply with quantum dot r…
Methods to efficiently determine the phase behavior of novel proteins have the potential to significantly benefit structural biology efforts. Here, we present protocols to determine both the solubility boundary and the supersolubility boundary for protein/precipitant systems using an evaporation-based crystallization…
Lipid vesicles spontaneously fuse and assemble into a lipid bilayer on planar or spherical silica surfaces and other substrates. The supported lipid bilayers (SLBs) maintain characteristics of biological membranes, and are thus considered to be biomembrane mimetic systems that are stable because of the underlying subs…
During the operation of solid oxide fuel cells (SOFCs) the Ni base anode and/or Ni-mesh is in direct contact with the ferritic steel interconnect or the metallic substrate. For assuring long-term stack operation a diffusion barrier layer with high electronic conductivity may be needed to impede interdiffusion between…
We develop a lattice model for the splay flexoelectric effect in nematic liquid crystals. In this model, each lattice site has a spin representing the local molecular orientation, and the interaction between neighboring spins represents pear-shaped molecules with shape polarity. We perform Monte Carlo simulations and…
Properties of the dynamical-mode-locking phenomena are studied in the ac driven overdamped Frenkel-Kontorova model with deformable substrate potential. Appearance of very large subharmonic steps due to deformation of the substrate potential significantly influences the stability and existence of harmonic steps. Strong…
Abstract A 2D isothermal finite element simulation of the injection stretch‐blow molding (ISBM) process for polyethylene terephthalate (PET) containers has been developed through the commercial finite element package ABAQUS/standard. In this work, the blowing air to inflate the PET preform was modeled through two diff…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTDirect Observation of Rotational Motion of Fluorophores Chemically Attached to Polystyrene in Its Thin FilmsZhongli Zheng†, Fangying Kuang, and Jiang Zhao*View Author Information Beijing National Laboratory of Molecular Science, Joi…
We studied the effects that deviations from a perfectly flat structure have in the adsorption of water on a single graphene sheet at room temperature. To do so we performed molecular dynamics simulations of water on top of a single sheet of carbon atoms whose positions were changed periodically or randomly and the res…
Silicate particles with various types of internal structures were prepared via one-pot synthesis. Spherical particles with sizes of 50-100 nm could be obtained by a simple precipitation process with the addition of alcohol to an aqueous sodium silicate solution. By controlling the reaction conditions such as the preci…
We introduce a novel single-step method capable of a continuous production of Pt catalysts supported on carbon agglomerates for the preparation of the fuel electrode. An acetylene-air diffusion flame is employed as heat and carbon sources, and Pt(acac)(2)-containing xylene droplets are injected into the flame. A sampl…
Paramagnetic nanomaterials for use as magnetic resonance imaging (MRI) contrast agents have higher relaxivity than conventional low molecular weight MRI agents. However, the biocompatibility and pharmacokinetics of such nanomaterials will strongly affect the likelihood of clinical approval. We synthesized MRI contrast…
Layer-by-layer (LbL) thin film assembly behaviors of the polymethylene-type polyelectrolytes poly(fumaric acid) and poly(methyleneamine) were comprehensively studied as a function of the dipping solution pH values. Since polymethylene-type polyelectrolytes can possess double the density of side-chain charges of conven…
A multistep procedure to prepare heterogeneous structured surfaces with contrasted chemical functionalities at the nanometer scale is presented. Aryldiazonium cations are used for the nanopatterning of electrodes to create hybrid surfaces. The nanopatterning procedure involves the auto-organization of a polystyrene (P…
A novel and effective methodology to control the diameters of semiconductor nanowires is reported through a versatile contact-printing method for obtaining size-controlled nanocatalysts by size-tunable carbon-based nanometer stamps. Vertically aligned carbon nanopost arrays, derived from nanoporous alumina templates,…