Materials Literature
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Two extensive homologous series of H-shaped symmetrical dimers were synthesized and their thermotropic properties studied by differential scanning calorimetry and on a hot-stage of a polarizing microscope. These compounds consist of two mesogenic units of azoester interconnected through flexible spacers (n = 4) result…
Using first-principles density functional theory based calculations, carried out on the recently measured crystal structure data [K. Oka et al. J. Am. Chem. Soc. 132, 9438 (2010)], we study the changes in the electronic structure of BiCoO${}_{3}$ between the ambient-pressure condition and the high-pressure condition.…
Due to their intrinsic isotropic magnetic properties, soft magnetic composite (SMC) materials are applied in electrical machines in which the magnetic energy can be transported in three dimensions (3-D). However, in real applications, complicated magnetic properties such as anisotropy and nonlinearity, are found, in p…
A Comment on the Letter by Adrian C. Barnes et al., Phys. Rev. Lett. 103 225702 (2009). The authors of the Letter offer a Reply.
A Reply to the Comment by G. N. Greaves et al.<br/><br/>
Stimuli response behaviors of cystamine-core dendrimer in the presence of several reducing agents including vitamin C, sodium bisulfite, and DL-Dithiothreitol are described. A competitive redox cleavage and supramolecular aggregate formation model is proposed based on PFG NMR and (1)H NMR titration experiments. Furthe…
Specific heat has been measured down to 600 mK and up to 8 T by highly sensitive ac microcalorimetry on MgCNi${}_{3}$ single crystals with ${T}_{c}\ensuremath{\approx}$ 7 K. Exponential decay of the electronic specific heat at low temperatures proved that a superconducting energy gap is fully open on the whole Fermi s…
Directing films: The chemical vapor deposition of (MeO)3B on a multilayered Rh(111) substrate results in selective precursor decomposition leading to a boride-type film. This film can be oxidized into a well-ordered boron nitride monolayer (see picture with model structure), thus opening up a new approach to BN system…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTThickness Dependence of Reflection−Absorption Infrared Spectra of Supported Thin Polymer FilmsM. Djak†‡, E. Gilli†‡, Eero Kontturi*§, and R. Schennach*†‡View Author Information† Institute of Solid State Physics, Graz University of T…
We performed theoretical and experimental investigations of the magnetic properties of metamaterials based on asymmetric double-wire structures. Using the multipole model for the description of metamaterials, we investigated the influence of the geometrical asymmetry of the structure on the macroscopic effective param…
The magnetic and electronic properties of α-NaMnO2 and delafossite CuMnO2 are investigated using a full-potential linearized augmented plane wave method. For the monoclinic structure at room temperature, CuMnO2 behaves like a frustrated spin-lattice. For the triclinic structure at low temperature, the obtained magneti…
Abstract Functionalization of hydrofluoric acid‐etched crystalline silicon surfaces were performed using 4‐aminopyridine. This treatment was employed to perform an organic interface with the exterior ambient. The obtained treated surfaces were exposed to different organic vapors while keeping track of their electric c…
The heat capacity of natural lead molybdate (wulfenite, PbMoO 4 ) has been measured by the method of vacuum adiabatic calorimetry over the temperature range of (4.3 to 80) K, and its thermodynamic functions in the range from (0 to 320) K have been calculated. The obtained standard values are as follows: C p o (298.15)…
The optical band-gap energy (Eg) is an important feature of semiconductors which determines their applications in optoelectronics. So, it is necessary to investigate the electronic states of ceramic ZnO and effect of doped impurities at different processing conditions. Eg of the ceramic ZnO + xBi2O3 + xTiO2 where x =…
The structural information and functional insight obtained from X-ray crystallography can be enhanced by the use of complementary spectroscopies. Here the information that can be obtained from spectroscopic methods commonly used in conjunction with X-ray crystallography and best-practice single-crystal UV-Vis absorpti…
Abstract We report first to date ‘green’ metalorganic‐free synthesis of colloidal GaSe nanocrystals. Structure and optical properties of gallium selenide nanocrystals dispersed in oleylamine are discusses in respect to that conventionally prepared in alkylphosphonic solutions. We explore the organization of the partic…
The sulfur-transfer catalyst plays an important role in the fluid catalytic cracking (FCC) process through which the sulfur oxides (SO x ) are removed from flue gas. This work reports the synergistic effect between CeO 2 and MgO on the SO x oxidation and adsorption in the FCC process. The CeO 2 acts as the oxidation p…
We developed a novel photochemical technique for preparation of ceria (CeO 2 ) nanocrystals in simple aqueous solution containing only Ce(NO 3 ) 3, where no additive and no heating are required. Under UV light illumination, photochemical reduction of NO 3 − resulted in formation of NO 2 − accompanied by hydroxyl radic…
Co 1.5 M 1.5 /Al 1− x Ti x hydrotalcite-like compounds (where M = Co, Ca and x = 0, 0.1) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 °C for 4 h were all of spinel phase without crystalline TiO 2 phase being detected. Substitution of partial Al for Ti…
This paper describes the synthesis, structural analysis, and investigations of the optical and electrochemical properties of some gold nanoparticles (AuNPs) which consist of a triarylamine ligand shell attached to small gold cores (Au-Tara). The triarylamine chromophores were attached to small 4-bromobenzenethiol cove…