Materials Literature
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Effects of electric field-frequency, electric field-amplitude, mechanical stress, and temperature on the hysteresis area, especially the scaling form, were investigated in soft lead zirconate titanate (PZT) bulk ceramics. The hysteresis area was found to depend on the frequency and field-amplitude with the same set of…
(LSM) film electrodes of thickness 100, 450, 650, and were fabricated on yttria-stabilized zirconia (YSZ) electrolyte pellets by ultrasonic spray pyrolysis. In addition, thick LSM electrodes with a surface doped with La-, Sr-, or Mn-nitrate were studied. Electrodes were deposited on both sides of the YSZ pellets in a…
Type I restriction-modification (RM) systems are large, multifunctional enzymes composed of three different subunits. HsdS and HsdM form a complex in which HsdS recognizes the target DNA sequence, and HsdM carries out methylation of adenosine residues. The HsdR subunit, when associated with the HsdS-HsdM complex, tran…
Specific interactions and miscibility are demonstrated in a series of binary miscible blend comprising of bio-compatible/biodegradable polyesters, such as poly(epsilon-caprolactone) (PCL), poly(ethylene adipate) (PEA), or poly (butylene adipate) (PBA), and a macromolecular ester with polyphenol groups, tannic acid (TA…
The preparation and characterization of surface-PEGylated polymeric nanoparticles are described. These systems were obtained by UV irradiation of PHM and PHM-PEG(2000) as an inverse microemulsion, using an aqueous solution of the PHM/PHM-PEG(2000) copolymer mixture as the internal phase and triacetin saturated with wa…
Staphylococci cause the majority of the nosocomial implant-related infections initiated by adhesion of planktonic bacteria to the implant surface. It was hypothesized that plasma accelerating filtered pulsed arc discharge method enables combination of the advantageous properties of diamond with the antisoiling propert…
A series of FeCo-SiO(2) nanocomposite aerogels having different FeCo loadings of 3, 5, and 8 wt % were prepared using a novel urea-assisted sol-gel route. The size of the nanoparticles, which was estimated using Scherrer analysis of the main peak of the x-ray diffraction pattern, varies from 3 to 8 nm. X-ray absorptio…
Using the layer-by-layer technique, ELISA polystyrene plates were coated with multilayer assemblies of albumin with various heparins or with multilayer assemblies of albumin. The coatings containing heparin were tested for their ability to potentiate thrombin inhibition by antithrombin and its dependence on the layer…
Prominently enhanced capacitive performance of well-dispersed nanoparticles (NPs) on nitrogen-containing carbon nanotubes directly grown on Si has been achieved. The function of nitrogen amalgamation is to create preferential sites on carbon nanotubes (CNTs) with lower interfacial energy for attachment of NPs. This cr…
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.