Materials Literature
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The fluorescence decays of a tetrachromophoric calix[4]arene and a heptachromophoric cyclodextrin with appended pyridin-2'-yl-1,2,3-triazole groups, and their complexes with the cadmium ion, are analyzed with a sum of compressed hyperbola. Such functions are shown to be well suited for the recovery of the underlying d…
In this paper, a patch antenna with an PBG (photonic band-gap) structure was studied by FEM method, and the theory of PBG structure was introduced. The Ansoft HFSS is used for the simulation. A comparison between the conventional patch antenna and the new PBG antenna is given. It is shown that the surface waves propag…
In this paper, we fabricated crystalline FePO4 microstructures with controlled morphologies at relatively low temperature through kinetic manipulation. The morphology evolution was directly observed during the experiments. The morphologies were mainly determined by the amount of the H3PO4 in the reaction system. The m…
The effect of Al and Zr on the viscosity of the supercooled liquid in melt-spun Zr-Ti-Nb-Cu-Ni-Al glassy ribbons has been evaluated by parallel plate rheometry. The change of composition drastically affects the viscosity of the samples. The viscosity of the supercooled liquid and the fragility parameter ( D *) increas…
The aim of present study is to investigate the feasibility of gamma ray scattering for measurements of mandibular bone density and stable iodine content of tissue. Scattered spectra from solutions of K(2)HPO(4) in distilled water (a phantom simulating the mandibular bone) and KI in distilled water filled in a thin pla…
The synthesis of superporous hydrogel composites (SPHCs) with various concentrations of chitosan as a composite material was carried out by solution polymerization. The characterization studies were performed by measurement of apparent density, porosity, swelling studies, mechanical strength studies, and scanning elec…
Traditionally, many contact sensors have been employed to collect data during an impact test. Often to select the appropriate data acquisition equipments and sensors, prior knowledge of the magnitude of the peak crushing parameters and the duration of the crash event is important. However, this is not an easy task. An…
The phytochemical study of the roots of Phlomis umbrosa Turcz. afforded three new phenylethanoid glycosides, 3'''-acetyl-O-betonyoside D (1), 2''', 3'''-di-acetyl-O- betonyoside D (2), and 3''', 4'''-di-acetyl-O-betonyoside D (3), along with five known phenylethanoid glycosides. Their structures were elucidated on the…
One-electron oxidized guanine is an important reactive intermediate in the formation of oxidatively generated damage in DNA and a variety of methods have been utilized for the abstraction of a single electron from the guanine moiety. In this study, an alternative approach for the site specific, independent generation…
High strength cold-rolled bake hardenable steel sheets for automotive use have been developed. In the last decade, the major strengthening methods of extra low carbon (ELC) steel and interstitial free (IF) steel were the solid-solution strengthening with silicon, manganese and phosphorous and the precipitation strengt…
Abstract: Pavements are constructed to deteriorate because of many factors such as traffic loading, material related factors, climate, and other environmental factors. In order to preserve these investments, a maintenance program should be carried out at right time and right places. One of the most important maintenan…
The self-assembly of 1,1′-bis(4-carboxybenzyl)-4,4′-bipyridinium dichloride with Cu(NO3)2 affords an unusual 9-fold [3 × 3] interpenetrated diamondoid-like coordination polymer with copper-based paddlewheel as connecting node, which shows interesting electronic transition and magnetic properties.
Inorganic semiconductors have properties that are notoriously difficult to control due to the deleterious impact of crystalline imperfections, and this is especially so in solar cells. In this work, it is demonstrated that materials grown using wet chemistry processes for the preparation of nanocristalline precursors…
The magnetization process of single crystalline GaV4S8 including tetrahedral magnetic clusters was measured in the magnetically ordered state below T C ≊ 13 K. Just below TC, steps were observed at very low fields of the order of 100 Oe, suggesting the competition of several intra- and inter-cluster interactions in a…
The effects of passivation on monocrystalline silicon solar cells were investigated. and films, prepared by atomic layer deposition and thermal oxidation, respectively, were used as passivation layers. Passivation using a monolayer yielded a cell efficiency of 17.5%. However, the bilayer structure drastically increase…
We report the synthesis of a cyclotriveratrylene-based molecular container and its distinctly different modes of complexation with dimethyldiazapyrenium and 4,4'-biphenylbisdiazonium ions.
This article investigates the breakdown of high-k/metal gate stacks under substrate injection regime. It is shown that it is initiated by a field driven breakdown of the interfacial layer (IL). Furthermore, because it is very sensitive to IL thickness variations, TBD optimization supposes a control of the high-k depos…
This study presents a novel microlens formation technology to implement a polymer ball lens in liquid medium. The highly symmetric ball lens is achieved due to the lower gravity influence in liquid. The microlens' diameter is controlled by the volume of the dispensed polymer. Moreover, it is easy to dispense, form, an…
A planar fuel cell stack is a layered structure consisting of repeated modules—membrane-electrode assemblies (MEAs) separated by bipolar plates (BPs). Generally, the distributions of voltage and temperature over the BP volume are described by three-dimensional Laplace equations. However, the thickness of a BP is much…
Highly reactive N-polar [000−1] GaN surfaces were analyzed using spectroscopic ellipsometry. Following exposure to air, observed changes in the pseudodielectric function near the GaN band edge indicate that surface contamination reduces the band bending. A subsequent Ga adsorption/desorption experiment on pristine N-p…