Materials Literature
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The role of metal ͑Au, Pt, and Ag͒ electrodes in yttria-stabilized zirconia ͑YSZ͒ electrolyte-based impedancemetric nitric oxide ͑NO͒ sensors is investigated using impedance spectroscopy and equivalent circuit analysis.Focus on the metal/porous YSZ interface is based on previous studies using a symmetric cell ͑metal/Y…
Abstract Biodegradable and biocompatible composites based on soy protein isolate (SPI) and various cellulose derivatives have been prepared, and the dependence of structures and mechanical properties on the content and species of cellulose derivatives for the composites were investigated by X‐ray diffraction, differen…
Anodic oxygen evolution reaction on titanium oxide film and its affect on the surface and bulk properties of the film is an important subject in the Ti-based studies and applications. In this work, the behavior of oxygen evolution and some other related electrode processes occurring at anodically grown Ti O 2 films on…
Mechanical strain gradient induced polarization effect or flexoelectricity in perovskite-type ferroelectric and relaxor ferroelectric ceramics was investigated. The flexoelectric coefficients measured at room temperature ranged from about 1 μ C m −1 for lead zirconate titanate to 100 μ C m −1 for barium strontium tita…
The effect of Mg incorporation on structural and optical characteristics of rhombohedral Zn 2 Ge O 4 doped with manganese was systematically studied, fixing the concentration of manganese at 2 atom %. The phosphors were prepared by a high-temperature solid-state-reaction technique. The structural properties were studi…
A tight-binding model is used to study the role of impurities in a graphene ribbon. The graphene ribbon is made of lines of carbon atoms in an armchair or zigzag shape where the impurities are included in the ribbon substitutionally. The addition of a line of impurities opens up a gap in the energy spectrum. The size…
The role of hydrogen-containing surface species in the alkaline dissolution of aluminum was studied by secondary ion mass spectrometry (SIMS) and atomic force microscopy (AFM). The measurements revealed quasi-periodic nucleation and dissolution of large number densities of size particles, during open-circuit dissoluti…
The plasmon response of a spherical metallic shell becomes significantly more complex as its size is increased beyond the quasistatic limit. With increasing size and decreasing aspect ratio (r1/r2), higher order multipolar modes contribute in a more dominant manner, and two distinct core-shell geometries exist that pr…
Nucleation of polymorphs is a phenomenon in which a chemical compound crystallizes with different molecular packing arrangements in the solid state. Glycine, the simplest amino acid, usually crystallizes as the metastable α-polymorph from pure aqueous solution. Based on our previous studies (Poornachary et al. Cryst.…
The corrosion behavior of a pure aluminum/pure copper couple in a weakly conductive sulfate solution was investigated. Potential and current distributions on the surface of the model couple at the beginning of immersion were obtained by solving the Laplace equation using a finite element method (FEM) algorithm. The po…
The utility of mesoporous silica particles to encapsulate nutraceuticals and thereby serve as a molecular tracker, a drug carrier and a controlled drug release system is investigated.
Reaction of a cluster precursor [Et 4 N] 2 [MoOS 3 (CuCN)] ( 1 ) with equimolar [Cu(MeCN) 4 ](PF 6 ) in MeCN/aniline gave rise to an interesting polymeric cluster {[Et 4 N] 2 [MoOS 3 Cu 2 (μ-CN)] 2 ·2aniline} n ( 2 ), while treatment of 1 in MeCN with 2 equiv of CuCN and KCN in H 2 O afforded the other polymeric clust…
Motivated by the production of fine chemicals and the improvement of flame retardance properties, experiments have been performed with a fixed-bed reactor to investigate the catalytic action exerted by zinc chloride on fir wood pyrolysis (catalyst concentrations between 0 and 16% on a dry wood basis and heating temper…
Gelatin hydrogel electrolytes ͑GHEs͒ with varying NaCl concentrations have been prepared by cross-linking an aqueous solution of gelatin with aqueous glutaraldehyde and characterized by scanning electron microscopy, differential scanning calorimetry, cyclic voltammetry, electrochemical impedance spectroscopy, and galv…
Highly crystalline and nearly monodisperse In 2 O 3 nanocrystals with both cube and flower shapes were successfully synthesized in one step through a facile aqueous solvothermal method for the first time, free of any surfactant or template. X-ray diffraction (XRD), transmission electron microscopy (TEM), selective are…
Injectable nanocomposites made of biodegradable poly(propylene fumarate) and the crosslinking agent propylene fumarate-diacrylate as well as each of three forms of single-walled carbon nanotubes (SWNTs) were evaluated for their in vitro cytotoxicity. Unreacted components, crosslinked networks, and degradation products…
The dispersion of nanomaterials in solutions is of primary importance for the improvement of their processability, but it also provides a way to investigate phase behavior and to assemble nanostructures in solvents. Several methods based on different interactions have been developed to disperse carbon nanotubes, where…
A new method was developed in this work for extraction of chitosan from the zygomycetes cell wall. It is based on the temperature-dependent solubility of chitosan in dilute sulfuric acid. Chitin is soluble in neither cold nor hot dilute sulfuric acid. Similarly chitosan is not soluble at room temperature but is dissol…
We study the interactions and directed assembly of dipolar nematic colloidal particles in planar nematic cells using laser tweezers. The binding energies for two stable configurations of a colloidal pair with homeotropic surface alignment are determined. It is shown that the orientation of the dipolar colloidal partic…
The grafting of 3-aminopropyltriethoxysilane (APTES) onto the internal aluminol groups of two kaolinite minerals from Georgia and from Cameroon was achieved by utilizing their corresponding dimethyl sulfoxide (DMSO) intercalation compounds as intermediates. The modified clays were characterized by powder X-ray diffrac…