Materials Literature
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We numerically investigate by the finite-difference time-domain method the effects of surface termination on directional emission exiting a photonic crystal waveguide. The directed power and far-field beam profile for the original proposal [E. Moreno et al., Phys. Rev. B 69, 121402 (2004)] and its enhancement [S. K. M…
Stability effects in photoconductivity (PC) rise and decay have been studied over a period of 2 years in thin films of (Cd-Pb)S:LiF, La/Pr and (Cd-Zn)S: LiF,La/Pr and have been found quite stable; however, those of CdS are not that stable. Results of annealing effect are also included, which present more stable values…
Six new polyamides (5a-f) containing p-phenylenediacrylic and hydantoin moieties in the main chain were prepared by direct polycondensation reaction of 4-phenylenediacrylic acid (3) with 6 different hydantoin derivatives (4a-f) using thionyl chloride and pyridine as condensing agents and N-methyl-2-pyrolidone as solve…
The continuous tunability of iron oxide nanoparticle dimensions is demonstrated using the pH controlled loading of ferric nitrate from aqueous solution into polystyrene-block-polyacrylic acid reverse micelles deposited on a silicon substrate. Quasi-hexagonally ordered two-dimensional arrays of iron oxide nanoparticles…
A systematic investigation of intersubband optical absorptions in ${\text{In}}_{x}{\text{Ga}}_{1\ensuremath{-}x}{\text{As}}_{1\ensuremath{-}y}{\text{N}}_{y}/\text{AlAs}/{\text{Al}}_{z}{\text{Ga}}_{1\ensuremath{-}z}\text{As}$ double-barrier quantum well (DBQW) structures is reported. Electron subbands and the energy de…
A 66-year-old woman with ovarian cancer which had metastasized was receiving chemotherapy with cisplatin and cyclophosphamide while undergoing haemodialysis for chronic renal failure. Cisplatin concentration in plasma was measured by flameless atomic absorption spectroscopy. After infusion of 40 mg cisplatin/m2 body-s…
Boron is selectively implanted on the surface of an n-type silicon wafer to form a p-type area surrounded by an n-type area. The wafer is then put into a buffered oxide etch solution. It is found that the n-type area can be selectively etched without illumination, with an etching rate lower than 1 nm min(-1), while th…
The electrodeposition of tellurium (Te) and indium (In) atomic layers on n-type GaAs(100) substrates is described. As-received n-GaAs(100) substrates were treated in 10% HF and ultraviolet (UV) ozone cleaned. The substrates were then transferred to an ultrahigh vacuum (UHV) chamber and cleaned by Ar + ion bombardment.…
Abstract We will present a solid-state 17O NMR study of β-glycine and demonstrate that 17O NMR parameters are highly sensitive to the local molecular structures, in particular, hydrogen-bond environments, indicating that, potentially, solid-state 17O NMR is a powerful tool for investigating the polymorphs of drugs.
Diffractive microlens arrays with continuous relief are designed, fabricated, and characterized by using Fermat's principle to create an array of spots on the photoresist-coated surface of a substrate for parallel laser direct writing. Experimental results indicate that a diffraction efficiency of 71.4% and a spot siz…
A selective wet-etching method for micro-fabricating As2S3 glass ridge waveguides, using CS2 solution with iodine as an oxidising reactant, has been developed. The proposed method is based on photo-induced changes in chalcogenide glasses, and therefore can be free of photomasks and photoresists. The optical properties…
A novel fabrication process for nanostructures for thermoelectric microgenerators, based on a combination of a traditional silicon microfabrication techniques, electroplating and submicron ion-track nanolithography, is discussed. Ion-track etched polyimide nanotemplates (30–80 nm pore diameters) are used to grow Bi2Te…
Zwei reaktive Zustände, ein Triplett-Grundzustand und ein nur wenig höher liegender angeregter Quintettzustand, führen – je nach den elektronischen Verhältnissen des axialen Liganden X – zu entgegengesetzten Reaktivitäten von FeIV-Oxokomplexen in O-Transfer- und H-Abstraktionsreaktionen (siehe Bild). Bei den RuIV-Anal…
Drug Prescribing for Patients with Chronic Kidney Disease in General Practice: a Cross-Sectional Study
Abstract The orientation and relaxation behaviors of a low‐density polyethylene melt and polypropylene melts with different melt indices undergoing a shear flow in a restricted channel were investigated by using ultrasound. A capillary rheometer was used to force the polymer melt through a slit die equipped with press…
Abstract An organic–inorganic hybrid composite for use as a coating agent was prepared by mixing linseed oil with hydrophobic octylsilyl titanium dioxide particles having an average diameter of 35 nm (OSI‐TIO2‐35) in volatile silicone. The weight ratio of linseed oil with OSI‐TIO2‐35 was varied from 2:8 to 8:2 and the…
A numerical method to model the surface of a reflowed square microlens is proposed to improve the simulation accuracy of photosensitivity for an image sensor. To verify the proposed method, a reflowed square microlens with base size of 4.8×4.8 µm and sag height of 1.55 µm was fabricated and the modelling accuracy was…
The Kronig–Penney problem is a textbook example for discussing band dispersions and band gap formation in periodic layered media. For example, in photonic crystals, the behaviour of bands next to the band edges is important for further discussions of such effects as inhibited light emission, slow light and negative in…
The work presented in this paper includes material characterisation and an investigation of suitability in seismic dampers for two commercially available NiTi-alloys, along with a numerical analysis of a new damper system employing composite NiTi-wires. Numerical simulations of the new damper system are conducted, usi…
Molecular dynamics (MD) simulations are extensively used in the study of the structures and functions of proteins. Ab initio protein structure prediction is one of the most important subjects in computational biology, and many trials have been performed using MD simulation so far. Since the results of MD simulations l…