Materials Literature
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The conductive nitrogen-doped diamond-like carbon film (N-DLC) of about 0.14 μm in thickness was deposited on highly conductive silicon wafer (111) with DC magnetron sputtering system. The electrochemical characteristics of the film have been studied with cyclic voltammetry (CV). The N-DLC film electrodes compare very…
Charged and neutral oxygen vacancies in the bulk and on perfect and defective surfaces of MgO are characterized as quantum-mechanical subsystems chemically bonded to the host lattice and containing most of the charge left by the removed oxygens. Attractors of the electron density appear inside the vacancy, a necessary…
Phylogenetic analyses, based upon nuclear small-subunit ribosomal RNA gene sequences, of four ‘chlorosarcinoid’ species referred to Planophila Gerneck show that the genus is polyphyletic. The type species, P. laetevirens Gerneck, is closely related to species in the Ulotrichales, Ulvophyceae. The monotypic sarcinoid g…
Abstract The development of crystalline structure and orientation during uniaxial stretching of cast amorphous linear and branched lactic acid films were investigated in the rubbery temperature ranges that spans between glass transition temperature and cold crystallization temperature. This material exhibited almost i…
A two-dimensional subwavelength grating (SWG) has been fabricated on a GaAlAs light-emitting diode (LED). The SWG is patterned by electron beam lithography and etched by fast atom beam with Cl/sub 2/ and SF/sub 6/ gases. The fabricated grating has 200 nm period and the tapered grating shape with aspect ratio of 1.38 t…
The authors have tabulated bacteria that mediate or facilitate various pairs of half-cell reactions affected by bacteria in otherwise kinetically unfavorable electrochemical cells. Nernst equation plots of these half-cell electrode reactions have been overlaid on the potential-pH Pourbaix diagram for iron, permitting…
Tissue engineering promises to replace and repair body organs but has largely been overlooked for artistic purposes. In the last 6 years, the authors have grown tissue sculptures, “semi-living objects,” by culturing cells on artificial scaffolds. The goal of this work is to culture and sustain for long periods tissue…
A series of linear, aliphatic m, n -polyurethanes [O−(CH 2 ) m −O−C(O)−NH−(CH 2 ) n −NH−C(O)] x derived from long-chain aliphatic diols HO−(CH 2 ) m −OH, where m = 12, 22, or 32, and much shorter diisocyanates O C N−(CH 2 ) n −N C O, where n = 4, 6, 8, or 12, were previously characterized and shown to have physical an…
The reactions which occur between amorphous carbon and a number of first transition metals (Ti, Cr, Fe, Co, Ni, and Cu) have been studied by transmission electron microscopy (TEM). The materials are in thin-film form with the metal layer sandwiched between thicker carbon layers. In four cases, the predominant reaction…
The chromium doped spinel crystals, MgAl2O4:Cr3+, have been grown using floating zone technique and its application for the fiber-optic thermometer is discussed on the basis of the temperature dependence of the fluorescence lifetime. Lifetimes of the spinel crystals (τ=10 ms), which decrease with temperature, were abo…
The paper gives a short overview on recent approaches to link several time and length scales in soft matter simulations. Special attention is given to the fact that in contrast to low molecular weight compounds, intramolecular entropy is as important as the energetic contribution. First applications to industrially re…
Small-scale analyses of volatiles in minerals and glasses provide information on how volatiles influence high-temperature geologic processes and low-temperature alteration processes. Four techniques for determining the C-O-H volatile contents of andesitic glasses are compared: manometry, secondary ion mass spectrometr…
Work is being undertaken to develop a new multiplatform software programme for predicting a wide range of materials properties for various alloy types. These properties include thermophysical and physical properties, mechanical properties, time–temperature transformation (TTT)/continuous cooling transformation diagram…
Au-core/Pt-shell bimetallic clusters have been loaded on the surface of TiO 2 (Au( x wt %)−Pt( y wt %)−TiO 2 (Pt/Au atomic ratio, z )) in a highly dispersed state by a two-step method consisting of the Au deposition and the subsequent Pt photodeposition. The mean diameter of the metal particles increases as a result o…
The optical properties of VO(2) nanoparticles formed in an amorphous SiO(2) host by stoichiometric ion implantation of vanadium and oxygen and thermal annealing have been determined and correlated with the particle size and morphology. The results show that that the temperature-controlled semiconductor-to-metal phase…
After modification with different trialkoxysilanes, nano-sized silica and alumina particles were used as fillers in transparent UV/EB curable acrylates for polymer reinforcement, particularly to attain scratch and abrasion resistant coatings. The acid catalyzed condensation of the organosilanes forms a polysiloxane sh…
Abstract Dilute aqueous smectite suspensions are well suited to convert into functional nanofilms. The functionalization is performed by ion exchange of amphiphilic molecules carrying the desired functionality. A functionalized clay mineral nanofilm is obtained by the organization of the molecules at the clay surface…
A carotenoid binding protein (CBP) has been isolated from the silk glands of Bombyx mori larvae. The protein has an apparent molecular mass of 33 kDa and binds carotenoids in a 1:1 molar ratio. Lutein accounts for 90% of the bound carotenoids, whereas alpha-carotene and beta-carotene are minor components. Immunologica…
Poly(oxyethylene- b -oxybutylene) block copolymers of various chain lengths (E m B n ) were blended with poly(oxybutylene) homopolymer (B h ), materials having different segregation strengths and morphologies (lamellae, cylinder, and sphere) were obtained. The isothermal crystallization kinetics and melting behavior o…
Abstract The adsorption of hexadecyltrimethylammonium (HDTMA) in smectite was studied by adsorption isotherms, X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Smectites that had reacted for 48 h with HDTMA cations equivalent to 0.2–3.0 times the cation exchange capacity (CEC) were…