Materials Literature
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We derive expressions for the lossy boundary-scattering contribution to the linewidth of surface electronic states confined with atomic corrals and island resonators. Correcting experimentally measured linewidths for these contributions along with thermal and intrumental broadening enables intrinsic many-body lifetime…
We report electrochemical and optical properties of the first electrochemically and chemically prepared green, soluble conducting polymer in its neutral form. Oxidative electrochemical and chemical polymerization of dioctyl-substituted 2,3-di(thien-3-yl)-5,7-di(thien-2-yl)thieno[3,4- b ]pyrazine ( 3b ) results in a so…
Well-aligned ZnO nanowires were synthesized by simple physical vapor deposition using c-oriented ZnO thin films as substrates without catalysts or additives. The synthesized ZnO nanowires have two typical average diameters: 60nm in majority and 120nm in minority. They are about 4μm in length and well aligned along the…
The size of proteins that can be studied by solution NMR spectroscopy has increased significantly because of recent developments in methodology. Important experiments include those that make use of approaches that increase the lifetimes of NMR signals or that define the orientation of internuclear bond vectors with re…
We assessed the ability of luminescent quantum dots (QDs) to function as energy acceptors in fluorescence resonance energy transfer (FRET) assays, with organic dyes serving as donors. Either AlexaFluor 488 or Cy3 dye was attached to maltose binding protein (MBP) and used with various QD acceptors. Steady-state and tim…
The synthesis of a new ligand (1) containing a single phenanthroline (phen) chromophore and a flexibly connected diethylenetriamine tetracarboxylic acid unit (DTTA) as a lanthanide (Ln) coordination site is reported [1 is 4-[(9-methyl-1,10-phenantrol-2-yl)methyl]-1,4,7-triazaheptane-1,1,7,7-tetraacetic acid]. From 1,…
Three-dimensional nanoarchitectures (see Figure) are formed by the oriented aggregation of CuO nanoparticles. One-dimensional orientation in the early stages of aggregation (in the [001] plane) of CuO nanoparticles is followed by formation of single-crystalline nanostructures consisting of hundreds of oriented nanopar…
Abstract In this review article, we explore covalent chemical strategies for the functionalization of carbon‐nanotube surfaces. In recent years, nanotubes have been treated as chemical reagents (be it inorganic or organic) in their own right. Indeed, from their inherent structure, one can view nanotubes as sterically…
The wetting and the self-cleaning properties (the latter is often called the "Lotus-Effect") of three types of superhydrophobic surfaces have been investigated: silicon wafer specimens with different regular arrays of spikes hydrophobized by chemical treatment, replicates of water-repellent leaves of plants, and comme…
Ferroelectric thin films are multifunctional materials with applications in a wide range of microelectronic and microelectromechanical devices. The recent investigations on multilayer heterostructures builtup with ferroelectric layers of different compositions have shown an enhancement of the dielectric, ferroelectric…
The assembly of lysozyme (hen egg white) at the surface of aqueous solution follows the same behaviors as amphiphilic molecules. The critical assembly concentration appearing in the protein solutions is found to coincide with the equilibrium concentration of protein crystals under given conditions. The crystallization…
Polarization-dependent Raman spectra are presented to analyze the structural properties of epitaxial, quasiepitaxial, and microcrystalline silicon films deposited on (100) single-crystal silicon substrates by electron cyclotron resonance plasma-enhanced chemical-vapor deposition. We rotate the sample with respect to t…
The transport and magnetic properties of La0.9Ce0.1MnO3 epitaxial thin films without observable impurity of CeO2 on their x-ray diffraction data using pulsed laser deposition method were investigated by varying the oxygen partial pressure and the substrate temperature with the intention being to investigate whether th…
Metallic glasses have often been regarded as ideal model systems of dense random packing with strong interaction among their components. Here we report direct evidence for the presence of the Einstein oscillator with an Einstein temperature θE of 74 K, which induces the boson peak at 4.9 meV in bulk metallic glass Zr4…
Alumina nanotube (ANT) and nanowire (ANW) arrays were produced from highly ordered porous anodic alumina (PAA) by etching in phosphoric acid and subsequent thermal treatment. The domain structures that have small sizes provide more boundaries and break the hexagonal symmetry of the PAA template, thereby inducing star-…
Using a simple, feldspar-like model and the crystal-based reaction mechanism for water-rock kinetics being developed before, we show directly how the dissolution of euhedral faces of crystals are governed by the nonlinear quantity represented by the solubility product. The kinetic approach requires recognition of the…
Novel 2,3-O-hydroxyethyl- and 2,3-O-hydroxypropyl cellulose products were synthesized by heterogeneous etherification of 6-O-(4-monomethoxytrityl) cellulose (MMTC). Due to the very hydrophobic character of MMTC, the reaction was successful in the presence of anionic and non-ionic detergent in the reaction mixture yiel…
Atomically resolved room temperature scanning tunneling microscopy images of carbon nanotubes were obtained, and actual values of the nanotube dimensions were estimated from a line profile fitting analysis. It was found that the cross sectional deformation induced by the van der Waals forces between the CNTs and the s…
The electrolytes currently investigated for high temperature solid oxide fuel cells are reviewed in their electrical and mass transfer properties. First, these features are summarized and compared for the yttria stabilized zirconia, doped ceria and LaGaO3-based oxide. It has been clarified that the high electron condu…
The role of oxygen vacancy in lead–titanate–zirconate ferroelectric thin film has been numerically simulated using the two-dimensional four-state Potts model. On one hand, the presence of an oxygen vacancy in a perovskite cell strongly influences the displacement of the Ti4+ ion. Hence the vacancy–dipole coupling must…