Materials Literature
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This approach provides a new technique to synthesize silver nanoparticles (AgNPs) using CO(2)-expanded liquids (CXLs) as the processing medium. A soluble form of silver carboxylate, silver isostearate (AgISt), was synthesized and characterized. The XRD and DSC analyses indicated that the methylated branched alky chain…
Nickel–carbon nanotube (CNT) nanocomposites have been processed in a bulk form using a laser deposition technique, commercially known as the laser engineered net shaping (LENS) process. Mechanical milling of the powder feedstock consisting of nickel powders and CNTs before laser deposition has resulted in not only a m…
Abstract A bifunctional siloxane cage, where double four-membered ring (D4R) silicate was capped with alkoxyvinylsilyl groups, was synthesized as a novel building block for the formation of inorganic–organic microporous solids in order to show its usefulness for synthesizing silica-based nanomaterials with unique stru…
The orbital symmetries of electron-doped iron-arsenide superconductors $\text{Ba}{({\text{Fe}}_{1\ensuremath{-}x}{\text{Co}}_{x})}_{2}{\text{As}}_{2}$ have been measured with x-ray absorption spectroscopy. The data reveal signatures of $\text{Fe}\text{ }d$ electron itinerancy, weak electronic correlations, and a high…
The valence band structure of the icosahedral $(i)$ Ag-In-Yb quasicrystal, which is isostructural to the binary $i\text{-Cd-Yb}$ system, is investigated by ultraviolet photoemission spectroscopy (UPS). Experimental results are compared with electronic-structure calculations of a cubic approximant of the same phase. UP…
Magnetoelectric (ME) Ni–lead zirconium titanate–Ni trilayers with neither electrodes nor bonding layers have been derived by electroless deposition. The structure and magnetic properties of the electroless deposited Ni layers with different pH values are characterized by x-ray diffraction and vibrating sample magnetom…
The structure and electronic property at the cleaved (001) surfaces of the newly discovered pnictide superconductors ${\text{BaFe}}_{2\ensuremath{-}x}{\text{Co}}_{x}{\text{As}}_{2}$ with $x$ ranging from 0 to 0.32 are systematically investigated by scanning tunneling microscopy. A $\sqrt{2}\ifmmode\times\else\texttime…
The aim of the present study was to determine the influence of doping rare earth ion on strontium calcium aluminate (CaO–SrO–SiO 2 –Al 2 O 3 ). Therefore, the authors have manufactured luminescent material consisting of 40CaO–5SrO–5SiO 2 –50Al 2 O 3 doped with Dy 3+ . The compositions have been selected on the basis o…
The establishment of conductive graphene-molecule-graphene junction is investigated through first-principles electronic structure calculations and quantum transport calculations. The junction consists of a conjugated molecule connecting two parallel graphene sheets. The effects of molecular electronic states, structur…
The effect of incorporation of different types of accelerators i.e. TMTD, TMTM, DOTG and NPV/C on properties of NBR rubber was investigated. Without any organic accelerator it required long time to cure; tensile properties showed the least value but elasticity was the highest one and ageing properties were poor. Thiur…
Novel hexyl-substituted bisthiophene compounds containing a thiazolothiazole(5,4-d) unit have been explored. The molecules are soluble in common organic solvents, which would enhance their chance of possible integration in printable electronics. Synthesis and complete elucidation of the chemical structures by detailed…
We have systematically investigated structural and ferroelectric properties of A- and B-site co-doped BiFeO3 thin films using the composition spread technique. X-ray diffraction and polarization hysteresis loop measurements reveal that the co-doped (Bi,Sm)(Fe,Sc)O3 exhibits the structural transition from the rhombohed…
We report the influence of processing atmosphere on the evolution of oxide-embedded germanium nanocrystals (Ge-NCs) formed by the thermal processing of (C 6 H 5 GeO 1.5 ) n sol−gel polymers. In an inert processing atmosphere (100% Ar), the generation of elemental Ge from thermally induced disproportionation of the ger…
In this review we examine the use of reflection absorption infrared spectroscopy (RAIRS) as a tool for studying model catalyst surfaces. Model catalysts allow us to study the structural and physical properties of their surfaces at an atomic level in a controlled environment in order to gain a fundamental understanding…
We have prepared germanium carbide (Ge1−xCx) films on Si(0 0 1) by radio frequency (RF) reactive sputtering a pure Ge(1 1 1) target in a CH4/Ar mixture discharge, and found that the sp3 hybridized carbon atoms in the Ge1−xCx film can be significantly increased in two ways. One is by increasing the Ge content via incre…
In the U.S.A., cotton is classed (primary quality parameters) by the Uster ® High Volume Instrument (HVI), which must be maintained under tightly controlled laboratory environmental conditions. Improved and fast response quality measurement systems and tools are needed to rapidly assess the quality of cotton. One key…
The synthesis of horizontal porous anodic alumina (PAA) structures with individually addressable channel systems is demonstrated. This was achieved by developing a multicontact design of aluminum finger structures (two to five contacts) on silicon wafers. These aluminum contacts were electrically isolated from each ot…
The effects of incident electron current density and temperature on the total electron emission yield of polycrystalline CVD diamond, Belhaj, M, Tondu, T, Inguimbert, V, Barroy, Pierre, Silva, François, Gicquel, Alix
Magnetic and electrical properties of ${\text{Ag}}_{2}{\text{MnO}}_{2}$ were examined by elastic and inelastic neutron-scattering measurements and by density-functional calculations. The spins of the triangular antiferromagnet metal ${\text{Ag}}_{2}{\text{MnO}}_{2}$ are found to freeze into a gapless short-range colli…
We investigate a homopolymer brush system on the basis of the wormlike-chain model, incorporating an Onsager-type interaction between polymer segments in the excluded-volume interaction. The model depends on the ratio between the total polymer length and the persistent length and a reduced grafting density as two basi…