Materials Literature
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The fabrication of ferroelectric thin films on flexible metal foils or polymeric substrates is of particular interest for embedded capacitors integrated into Printed Circuit Boards (PCB). In this work, Ba x Sr 1− x TiO 3 ( x = 1, 0.9, 0.7, 05, 0.3, 0.1, and 0) polycrystalline thin films were fabricated at low temperat…
The phase evolution, microstructure, and magnetic properties of melt spun SmCo7−xNbx (x=0–0.6) ribbons have been investigated using powder x-ray diffraction, transmission electron microscopy, and vibrating sample magnetometer, respectively. SmCo7−xNbx ribbons could crystallize in TbCu7-type structure only for low Nb s…
Abstract Gutes Modell? Partikuläre Edelmetallkatalysatoren benötigen oft kleine Mengen von Sauerstoff, um ihre optimale katalytische Aktivität auszuspielen. Die genaue Struktur und Zusammensetzung der beteiligten Metalloxidcluster ist aber bis heute, fast zweihundert Jahre nach ihrer Entdeckung, nicht geklärt. Ein neu…
Abstract A novel series of one‐pack solvent borne polyurethane‐urea insulating coatings was prepared from hydroxyl‐terminated prepolymers (HTP) and blocked isocyanate curing agent (BIC). HTP was prepared from poly z(tetramethylene ether)glycol (PTMEG) with excess amount of toluene diisocyanate (TDI) and subsequent rea…
Cadmium sulfide (CdS) nanocrystals were in situ grown in a polyvinylpyrrolidone (PVP) matrix at room temperature using cadmium nitrate and thioacetamide as the cadmium and sulfur sources, respectively. It was found that the growth of CdS nanocrystals in the PVP matrix was well controlled and the mass concentration of…
The interaction of NO with adsorbed atomic oxygen on Pt(111) was studied with temperature programmed desorption (TPD), infrared reflection absorption spectroscopy (IRAS), and low-energy electron diffraction (LEED). Atomic oxygen adlayers with 0.25 and 0.75 ML coverages were prepared on a Pt(111) single crystal by diss…
Stacking faults (SFs) in Co-based alloy grains in a Co100−xMx (M: Cr, Mo, and W) film are evaluated by means of in-plane x-ray diffraction. Moreover, the correlation between SFs and uniaxial magnetocrystalline anisotropy Ku is discussed in connection with the spin-orbit interaction. The ratio of the integrated intensi…
Abstract A series of four‐coordinate boron compounds of the type N , O ‐(OPh OxZ ArX)BPh 2 or N , O ‐(OPh OxZ NPh 2 )BPh 2 ( 5a – g ) has been prepared by treating triphenylboron (TPB) with2‐(4,4‐dimethyl‐4,5‐dihydrooxazol‐2‐yl)‐4‐X‐arylphenols(HOPh OxZ ArX; 4a – f ) or 2‐(4,4‐dimethyl‐4,5‐dihydrooxazol‐2‐yl)‐4‐(4‐dip…
Abstract Heavily‐doped ZnO:Al films have been deposited on high temperature stable glass substrates using radio‐frequency (RF) magnetron sputtering. The effect of growth temperature on physical properties of the films has been investigated. The microstructure evolved a columnar structure into a granular one with the i…
HMS-supported Ni catalysts were prepared by the direct synthesis and the impregnation method. In the direct synthesis, the effect of nickel content and pH value of the preparation system on the catalyst structure and hydrodechlorination performance was systematically investigated. The physicochemical properties of the…
OBJECTIVES: A liposome preparation that is amenable to receptor-mediated endocytosis has been developed to enhance the oral bioavailability of poorly absorbable peptidomimetic drugs by use of folic acid as the mediator of liposomal uptake. METHODS: Folic acid was physically coupled to the surface of the liposomes and…
Abstract In the present work, a possibility to use thermal annealing of porous silicon to enlarge the pore sizes has been studied. The size of the pores can be increased by controlling the annealing temperature and time. The pore enlargements from 10 nm even up to 100 nm can be obtained without destroying the pore str…
Optical scanning tomography is used to characterize bulk properties of transparent water-in-paraffin oil emulsions stabilized with hexadecyl-trimethylammonium bromide (CTAB) and silica nanoparticles. A flow of 500 hundred images is used to analyze each scanning shot with a precision of about 1 microm. The role of sili…
Swap the coins! The Pt(2)Au(2), Pt(2)Au(2)Cu(2), and Pt(2)Au(2)Ag(2) complexes of 3,5-dimethylpyrazolate exhibit yellow-green, orange, and sky-blue luminescence, respectively (see figure). The emission energies of Pt(2)Au(2)M(2) complexes can be controlled by the change of the third coinage metal ions M. The Pt(2)Au(2…
Based on quantum mechanics and classical physics, a general analytical theory of ferromagnetic first order return curves is developed. No empirical assumptions or approximations are required.
Abstract We report an anionic surfactant approach for size and shape control in polyaniline, polypyrrole, and their polyaniline‐ co ‐polypyrrole random copolymer nanomaterials. A renewable resource azobenzenesulfonic acid anionic surfactant was developed for template‐assisted synthesis of these classes of nanomaterial…
Single crystals of calcium fluoroborate, Ca 5 (BO 3 ) 3 F (CBF), have been grown by the flux method with various proportions of LiF. This compound was investigated for nonlinear optical applications and was expected to exhibit an extended transparency window in the ultraviolet. The growth cracking and inclusions in th…
The theory of open quantum systems is used to study the local temperature and heat currents in metallic nanowires connected to leads at different temperatures. We show that for ballistic wires the local temperature is almost uniform along the wire and Fourier's law is invalid. By gradually increasing disorder, a unifo…
A well-aligned semiconducting organic nanowire assembly is obtained by a simple, one-step soft lithographic method (see image). A patterned nanowire assembly that forms J-type intermolecular aggregation shows high birefringence, dichroism, polarized emission, and electrical conductivity (4.9 × 10−6 S cm−1).
Phosphotungstic acid (H(3)PW(12)O(40)) was used as an efficient and recyclable catalyst for the synthesis of polysubstituted quinolines through the Friedländer condensation of 2-aminoarylketone with carbonyl compounds, which was achieved by conventional heating under solvent-free conditions.