Materials Literature
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We review some aspects of the realistic implementation of the dynamical mean-field method. We extend the techniques introduced in Ref.[A. Georges, G. Kotliar, W. Krauth, and M.J. Rozenberg, Rev. Mod. Phys. 68, 13 (1996)] to include the calculations of transport coefficients. The approach is illustrated on La_{1-x}Sr_x…
We apply first-principles calculations to study the electronic structure of boron nitride nanocones with disclinations of different angles $θ=nπ/3$. Nanocones with odd values of $n$ present antiphase boundaries that cause a reduction of the work function of the nanocones, relative to the bulk BN value, by as much as 2…
Hydrotalcite-like compounds (HTlcs) are solid sorbents that may potentially be used for high-temperature separation and capture of CO 2 . The high-temperature adsorption of CO 2 on Mg−Al−CO 3 HTlc is affected by structural changes that take place upon heating of the material. The structural changes of a synthetic HTlc…
A systematic approach towards highly fluorescent, water-soluble perylene-3,4:9,10-tetracarboxylic acid diimide chromophores is presented. Water solubility was introduced first through the attachment of four hydrophilic substituents onto the bay region of the perylene dye. Positively and negatively charged groups were…
The morphology of doped polypyrrole.Cl powder changes dramatically from granular to nanofibrillar when a very small amount (1-4 mg) of V2O5 nanofibers are added to a chemical oxidative polymerization of pyrrole in aq 1.0 M HCl using (NH4)2S2O8 as the oxidant. Unlike the polyaniline system, a key synthetic requirement…
We present a theoretical calibration of the RR Lyrae period-luminosity (PL) relation in the UBVRIJHK Johnson-Cousins-Glass system. Our theoretical work is based on calculations of synthetic horizontal branches (HBs) for several different metallicities, fully taking into account evolutionary effects besides the effect…
Bimetallic dendrimer-stabilized nanoparticles (DSNs) were used to prepare supported Pt-Au catalysts within the bulk miscibility gap for this binary system. Hydroxy-terminated generation 5 PAMAM dendrimers were used to prepare Cu(0) nanoparticles (NPs). The Cu(0) NPs were subsequently used to reduce K(2)PtCl(4) and HAu…
The shell secreted by molluscs is one of the most remarkable examples of a matrix-mediated mineralisation performed outside living tissues. The calcifying matrix is a mixture of proteins, glycoproteins, and polysaccharides that precisely self-assemble and control the CaCO3 polymorph (calcite, aragonite), the size, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReview of Developments in Portable Hydrogen Production Using Microreactor TechnologyJamelyn D. Holladay, Yong Wang, and Evan JonesView Author Information Battelle, Pacific Northwest Division, Richland, Washington 99352 Cite this: Chem. Rev. 2004, 104, 10, 4767–4790Publicatio…
Abstract Films of soluble collagen extracted from rat‐tail tendon were studied at the solid–solution interface, and the surface energy of the films was evaluated. The films transferred onto solid substrates using the Langmuir–Blodgett film (LB film) technique were characterized using Fourier transform IR attenuated to…
The origin of room-temperature near-infrared electroluminescence (EL) of nanocrystalline germanium (Ge) embedded in oxide was investigated. The nanocrystals were synthesized by partial oxidation of silicon-germanium, Si0.54Ge0.46, films. Under constant current density bias in accumulation and inversion, Ge nanocrystal…
Department of Chemistry and Institute of Natural Science, Yeungnam University, Gyongsan 712-749, KoreaReceived June 18, 2004Key Words : Nonlinear optical, Hyperpolarizability, Susceptibility, Heteroaromatics, StilbeneThe nonlinear optical (NLO) responses induced in variousmaterials are of great interest in recent year…
A Raman scattering study of the vibrational modes in K2Al2B2O7 crystals has been performed at room temperature. The vibrational modes are classified by the nuclear site group analysis method and the internal vibrational modes are assigned to vibrations of the BO3 triangle and AlO4 tetrahedron.
Erythritol is a noncariogenic, low calorie sweetener. It is safe for people with diabetes and obese people. Candida magnoliae is an industrially important organism because of its ability to produce erythritol as a major product. The genome of C. magnoliae has not been sequenced yet, limiting the available proteome dat…
In the present study, the damping behavior of bulk Cu–11.9Al–2.5Mn (wt%) was investigated using a multifunction internal friction apparatus through the method of forced vibration over the temperature range from room temperature to 400 °C. Two internal friction peaks are found at around 150 °C and 325 °C during heating…
The action of electron-trapping materials (ETMs) consists of three sequential steps, i.e., the storage, the transfer, and the release of energy. It is generally considered that the co-dopant acts as a trapping center to enhance the storage ability of ETMs, which focus on the first step. In this letter, by the abnormal…
The perovskite solid solution between ferromagnetic ${\mathrm{SrRuO}}_{3}$ and antiferromagnetic ${\mathrm{LaCoO}}_{3}$ is studied and its structural, electronic,and magnetic properties are compared with $({\mathrm{Sr}}_{1\ensuremath{-}x}{\mathrm{La}}_{x})({\mathrm{Ru}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}){\mathrm{O}}…
The perovskite solid solution between ferromagnetic ${\mathrm{SrRuO}}_{3}$ and antiferromagnetic ${\mathrm{LaFeO}}_{3}$ is studied and its structural, electronic, and magnetic properties are reported. With increasing ${\mathrm{LaFeO}}_{3}$, the solid solution forms a spin glass and undergoes, by Anderson localization,…
The structure and electrical transport properties of ${\mathrm{La}}_{0.8}{\mathrm{Ba}}_{0.2}\mathrm{Mn}{\mathrm{O}}_{3+\ensuremath{\delta}}$ thin films prepared on $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (100) substrates are studied in an effort to clarify the origin of the metal-insulator transition temperature enha…
The dependence on void size of the migration speed of morphologically stable voids that translate along metallic thin films due to surface electromigration is analyzed in finite-width films through self-consistent numerical simulations taking surface diffusional anisotropy into account. It is shown that, as the morpho…