Materials Literature
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We develop Electrochemical Mean-Field Kinetic Equations (EMFKE) to simulate electrochemical cells. We start from a microscopic lattice-gas model with charged particles, and build mean-field kinetic equations following the lines of earlier work for neutral particles. We include the Poisson equation to account for the i…
The magnetic ground state of the antiferromagnet Kondo lattice compound Ce8Pd24Ga has been investigated using neutron powder diffraction, inelastic neutron scattering and zero-field muon spin relaxation measurements. The neutron diffraction analysis, below TN (3.6(0.2)K), reveals a commensurate type-C antiferromagneti…
Abstract Solvothermal synthesis is an important technology for the preparation of nanowires at low temperature. Nanowires can grow as long as 100 μm with the aid of polymer matrix, and under the pressure generated by solvothermal reactions, the as‐prepared nanowires are well crystallized. For water‐sensitive reactions…
Abstract The layer‐by‐layer (LbL) desposition of oppositely charged polyelectrolytes from adsorption solutions of different ionic strength onto ∼7 nm diameter carboxylic acid‐derivatized gold nanoparticles has been studied. The polyelectrolyte‐modified nanoparticles were characterized by UV‐vis spectrophotometry, micr…
We study the roughness of stylolite surfaces (i.e. natural pressure-dissolution surfaces in sedimentary rocks) from profiler measurements at laboratory scales. The roughness is shown to be nicely described by a self-affine scaling invariance. At large scales, the roughness exponent is $ζ_1 \approx 0.5$ and very differ…
The macroscopic alignment and superlattice structures of CdSe nanorods in a nematic liquid‐crystalline (LC) phase are determined by the phases that form prior to complete solvent evaporation (e.g., vortex structures in linear arrays, see Figure). By controlling the phase of the LC solution and its orientation using pr…
One-dimensional $S=1$ $\mathrm{XXZ}$ chains with uniaxial single-ion-type anisotropy are studied by numerical exact diagonalization of finite-size systems. The numerical data are analyzed using conformal field theory, the level spectroscopy, phenomenological renormalization-group, and finite-size scaling method. We th…
The deterministic growth of different shapes of ZnO crystals from nanometer to micrometer scale is reported. Tetrapods (see Figure) and dendrites have been synthesized by simply adjusting the reaction temperature and the partial pressure of oxygen within the system. Size control of these structures can be achieved. Zn…
Abstract The systematic shape control of colloidal nanocrystals including one‐dimensional (1D) nanorods remains a key issue in the “bottom–up” approach of nanoscience. Here, we examine the anisotropic structural evolution of various semiconductor nanocrystals and systematically elucidate the key growth parameters for…
Abstract The shape of CdSe and other semiconductor nanocrystals is controlled, producing dots, rods, rice‐shaped particles, tetrapods, or other elongated shapes. Monomer concentration in the growth solution is the determining factor in shape‐control and shape‐evolution. The elongated shapes could be transformed into m…
By using seed‐mediation and careful control of pH , gold nanorods of high aspect ratio (∼ 18–25, 20 in the Figure) have been produced by surfactant‐directed synthesis. The yield is high (∼ 90 %) and the method can be readily adapted for scaling up.
Abstract A novel approach to the rational fabrication of smart and functional metal oxide particulate thin films and coatings is demonstrated on the growth of ZnO nanowires and oriented nanorod arrays. The synthesis involves a template‐less and surfactant‐free aqueous method, which enables the generation of, at large‐…
Abstract This article provides a comprehensive review of current research activities that concentrate on one‐dimensional (1D) nanostructures—wires, rods, belts, and tubes—whose lateral dimensions fall anywhere in the range of 1 to 100 nm. We devote the most attention to 1D nanostructures that have been synthesized in…
<div class="htmlview paragraph">With the recent interest in the possibilities of utilizing TPE materials as alternatives to flexible PVC (fPVC) in interior automotive applications, we have conducted a study of several soft touch polymer compounds in order to compare and contrast their characteristics with those…
<div class="htmlview paragraph">Laboratory testing and computer aided engineering (CAE) techniques have long been employed in the development and optimization of automotive bumper systems. However, as more aggressive automotive styling and performance trends and mass and cost reduction objectives continue to pus…
<div class="htmlview paragraph">Thixomolding (<span class="xref">1</span>) is a relatively new process in which the metallic slurry is injected into a die cavity tool at semi-solid or liquid temperatures to form near net-shape products from the solid feedstock. As part of on-going research into Thixo…
In an attempt to provide the low- and high-density polyethylene (LDPE and HDPE) plates with the autohesive and adhesive properties at lower grafted amounts, methacry-lamide (MAAm) was photografted onto their surfaces. The surfaces of the LDPE and HDPE plates were made highly hydrophilic by the photografting of MAAm, a…
<div class="htmlview paragraph">A study was performed on a lean NO<sub>x</sub> trap in which the loading of a ceria-containing mixed oxide in the washcoat was varied. After a mild stabilization of the traps, the time required to purge the NO<sub>x</sub> trap generally increased with incre…
Non-uniform distortion induced by superstructure domains has been observed during the ordering process of an order–disorder transformation in a single decagonal quasicrystal of Al 72 Ni 20 Co 8 . The full width at half maximum (FWHM) of the fundamental reflections increased below the transformation temperature, T c .…
<div class="htmlview paragraph">The use of two-component polyurethane foam materials to improve sealing, stiffness, and crash performance in vehicle structures has increased significantly in the past 10 years. The proven cost and performance advantages associated with polyurethane chemistry, along with recent de…