Materials Literature
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Highly stable field emission current densities of more than 6A∕cm2 along with scalable total field emission currents of ∼300μA per 70μm diameter carbon nanotube (CNT)-covered electron emitter dot are reported. Microwave-plasma chemical vapor deposition, along with a novel catalyst sandwich structure and postdeposition…
Gold nanoparticles stabilized by thiolates derived from normal and ω-functionalized alkane- and arenethiols (HS(CH 2 ) n CH 3, HS(CH 2 ) 10 COOH, HS(CH 2 ) 11 OH, HSC 6 H 4 NH 2, HSCH 2 CH 2 C 6 H 5, and HSCH 2 C 6 H 4 C(CH 3 ) 3 ) were synthesized. Differences in their chemical and ultrasonic stabilities were studied…
We have studied ${[{\mathrm{Co}}_{2}\mathrm{Mn}\mathrm{Ge}∕\mathrm{V}]}_{N}$ multilayers with a thickness of the V layers ${t}_{\mathrm{V}}$ between 1.5 and $10\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ and a fixed thickness of the Heusler layer ${t}_{{\mathrm{Co}}_{2}\mathrm{Mn}\mathrm{Ge}}=3\phantom{\rule{0.3em}{0ex}}\…
Perovskite-structured ceramics in the (1−x)BiSc1∕2Fe1∕2O3-xPbTiO3 (BSF-PT) system were fabricated for x⩾0.45 in which a morphotropic phase boundary (MPB) occurred between rhombohedral and tetragonal phases at x≈0.50(TC=440°C). Samples close to the MPB gave piezoelectric and electromechanical coupling coefficients of ∼…
Trilaurylamine (TLA) and dodecane (i.e., hydrogenated tetrapropylene HTP) are used in laboratories of nuclear fuel reprocessing control laboratories to extract specific radionuclides such as plutonium at a certain valence. The spent solvents issued from laboratories are generally not compatible by nature and activity…
Ordered porous ZnO films were electrodeposited on an ITO glass substrate covered with PS array templates by using a zinc nitrate aqueous solution as the electrolyte. The electrochemical deposition process was analysed and the characteristics of the porous films were discussed. The results showed that Zn 2+ had an anal…
We report a phonon transport model for a bulk thermoelectric material to investigate the effect of the grain diameter and the grain-boundary thickness on its thermal conductivity. The analysis results display that the bulk thermal conductivity is significantly reduced by decreasing the grain sizes when the grain diame…
The group contribution method for activation energies is applied to hydrogen abstraction reactions. To this end an ab initio database was constructed, which consisted of activation energies calculated with the ab initio CBS-QB3 method for a limited set of well-chosen homologous reactions. CBS-QB3 is shown to predict r…
Gutes Cholesterin: Oligo(p-phenylenvinylene) (OPVs), die mit Cholesterineinheiten mono- oder disubstituiert sind, bilden Pseudo-J- bzw. Pseudo-H-Aggregate (siehe Bild), die zu verknäuelten und verdrillten helicalen Strukturen mit unterschiedlichen optischen, chiroptischen und morphologischen Eigenschaften führen.
A number of fluorescent benzothiadiazole dyes have been synthesised and their optical properties, when dispersed in a liquid crystal host phase, examined. These dyes have five linearly π-conjugated aromatic ring systems (both with and without ethene and 1,3-butadiene spacers). The liquid crystalline host medium, used…
A series of donor-acceptor substituted stilbene and diphenylacetylene derivatives and their octupolar analogues have been synthesized and the linear and nonlinear optical properties (beta) studied by both experiments and theoretical calculation. The lambda(max) of the dipoles increases with the conjugation length and…
The structure and thermal expansion of multi-walled carbon nanotubes (MWNTs) with different diameters, prepared through the catalytic decomposition of vaporized benzene, were studied by x-ray diffraction at different temperatures, combined with scanning electron microscopy, transmission electron microscopy and electro…
Texture engineering using reactive-templated grain growth (RTGG) is reviewed as a key processing technique for lead free piezoelectric ceramics. Bismuth layer structured ferroelectric ABi4Ti4O15 (A=Na0·5Bi0·5, Ca, Sr) ceramics with a highly preferred {001} orientation were fabricated with enhanced piezoelectric proper…
We theoretically propose that the optical analog of a Lorentz force acting on a ray of light is realized in multiferroic materials such as ${\mathrm{GaFeO}}_{3}$ showing the magnetoelectric effect. The toroidal moment $\stackrel{\ensuremath{\rightarrow}}{T}=\ensuremath{\sum}_{j}{\stackrel{\ensuremath{\rightarrow}}{r}}…
Abstract Poly(lactide) (PLA) polymers have garnered increased attention in the last few years as food packaging materials because they are environmentally friendly polymers. As the production of PLA increases and price per pound drops, PLA is becoming a growing alternative as a green food packaging material. In this r…
In this study, selective cancer cell targeting of biodegradable poly(lactic acid) (PLA) nanoparticles (NPs) has been investigated in vitro. SKOV-3 (HER2 positive) ovarian cancer and Daudi (CD20 positive) lymphoma cell targeting was mediated by anti-HER2 (trastuzumab, Herceptin) and anti-CD20 (rituximab, Mabthera) mono…
We have synthesized the solid solution, Sr_2Fe_1+xMo_1-xO_6 with -1 <= x <= 0.25, the composition x = 0 corresponding to the well-known double perovskite system Sr2FeMoO6. We report structural and magnetic properties of the above system, exhibiting systematic variations across the series. These results restrict the ra…
Remarkable selectivity (88 % in the steady-state reaction and 94 % in the pulse reaction) is observed in the direct synthesis of phenol from benzene with molecular oxygen over a Re/zeolite catalyst prepared by chemical-vapor deposition. The novel interstitial-N/Re clusters are formed with NH3 and are essential for the…
Motivated by recent electron microscopy studies on the ${\mathrm{Si}}_{3}{\mathrm{N}}_{4}∕\text{rare}\text{\ensuremath{-}}\text{earth}$ oxide interfaces, the atomic and electronic structures of bare $\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{Si}}_{3}{\mathrm{N}}_{4}$ surfaces are investigated from first principl…
BACKGROUND: Although there is a well-documented risk of acute renal failure (ARF) with the iodinated contrast agents, intravenous gadolinium-based contrast agents are considered non-nephrotoxic and have been widely used for magnetic resonance imaging (MRI). However, debate continues regarding the safety issue of gadol…