Materials Literature
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Complexity conquered: Zeolite structures of unprecedented complexity have been determined using the new methods of charge flipping and histogram matching applied to X-ray powder diffraction data combined with data from electron microscopy. ITQ-37 (see picture) has a chiral structure of exceptionally low density and la…
Atomic force microscopy was used to study the adsorption of the surfactant octadecyl trimethyl ammonium chloride (C18TAC) at a low concentration (0.03 mM) to negatively charged surfaces in water. Atomic force microscopy tips were functionalized with dimethyloctadecyl(3-tripropyl)ammonium chloride (C18TAC-si) or N-trim…
Mechanisms of the fast optical nonlinearity are studied in two types of cells based on lyotropic ionic liquid crystals (LILC) of metal alkanoates. They are (I) bi-layer cell, which consists of a thin dye film covered by LILC, and (II) LILC with electrochromic impurity (viologen). Applying dc electric voltage to the ce…
We present a method of optoelectronic logic that relies on the digital optical switch. The logic gate is reconfigurable to implement the Boolean operators and, or, and not. Multiple logic gates can be cascaded on a single optoelectronic integrated chip to achieve complex logical functionality. The optoelectronic logic…
Thermal treatment of mineral ores such as ilmenite can initiate phase transformations that could affect their activation or deactivation, subsequently influencing their ability to dissolve in a leaching agent. Most laboratory-based X-ray diffraction (XRD) studies were carried out ex situ in which realistic diffraction…
Purpose The purpose of this paper is to review the design and fabrication of a micro‐accelerometer to be used to measure the heart wall motion of patients who have just undergone coronary artery bypass graft (CABG) surgery. The sensor will provide a means of early warning for the medical staff of associated complicati…
In order to overcome some problems in variable polarity gas tungsten arc welding (VP– GTAW) employed for welding aluminum alloy components, poor strength and ductility of weld metal, solidification cracking and weld porosity, a novel ultrafast–convert high frequency pulsed current VP– GTAW technique is developed. The…
Lack of consistent and available information for the entire tyre industry has often hindered adequate understanding of current and future issues that need to be addressed for improving the sustainable end-of-life tyre management. The aim of this paper is to review related best available technologies and techniques for…
In this letter, we investigate the dependence of the performance of metal-insulator-metal (MIM) capacitors with Sm2O3dielectric on plasma treatment (PT) performed before Sm2O3deposition, after Sm2O3deposition, or both before and after Sm2O3deposition. By performing PT in N2ambient (PTN) after Sm2O3dielectric formation…
S-, P- and R-striations, which can be observed in an inert gas dc discharge at low pressures and small current densities, are considered. Mechanisms of the resonant formation of the electron distribution function (EDF) in S-, P-, Q- and R-striation-like fields are discussed on the basis of an accurate numerical soluti…
A solid phase grinding of a unique framework-builder 2,2′ bipyridine with AgNO3 has resulted in the efficient formation of a novel 2D coordination polymer of an Ag(I) precursor salt. The structural investigation of the crystalline precursor complex reveals formation of a short Ag–Ag bond. A crystalline precursor salt…
An improved direct correlation function is proposed and applied to construct an accurate free energy functional. The theoretical method is extended to analyze the pore size distributions (PSDs) of both slit- and cylindrical-shaped carbonaceous materials. With the same parameters for the fluid and material as in the si…
Cation-exchange selectivity for alkali and alkaline-earth metal ions and tetraalkylammonium ions on a strongly acidic sulfonic acid cation-exchange resin has been investigated in the temperature range of 40-175 degrees C using superheated water chromatography. Dependence of the distribution coefficient (ln KD) on the…
Protein folding has been studied extensively for decades, yet our ability to predict how proteins reach their native state from a mechanistic perspective is still rudimentary at best, limiting our understanding of folding-related processes in vivo and our ability to manipulate proteins in vitro. Here, we investigate t…
Thymine-thymine mispairs are barriers to long-distance radical cation migration and are high reactivity sites in duplex DNA oligomers. A DNA oligomer was prepared that contains only A/T base pairs, arranged into a regularly repeating series of TT steps, and a covalently linked anthraquinone photosensitizer. Its UV irr…
This letter demonstrates a high-voltage, high-current, and low-leakage-current GaN/AlGaN power HEMT with$\hbox{HfO}_{2}$as the gate dielectric and passivation layer. The device is measured up to 600 V, and the maximumon-state drain current is higher than 5.5 A. Performance of small devices with$\hbox{HfO}_{2}$and$\hbo…
This paper presents the implementation of band-to-band tunneling (BTBT) mechanisms into the compact model of a conventional carbon nanotube transistor FET featuring a MOSFET-like operation. Appropriate equations enable the calculation of the BTBT current as well as the charge pileup in the channel. To ensure the model…
NMR-monitored pH titration experiments are routinely used to measure site-specific protein pKa values. Accurate experimental pKa values are essential in dissecting enzyme catalysis, in studying the pH-dependence of protein stability and ligand binding, in benchmarking pKa prediction algorithms, and ultimately in under…
Purpose The purpose of this paper is to investigate the curing efficiency of amine functional aniline furfuraldehyde condensate (AFAFFC) for diglycidyl ether of bisphenol A (DGEBA) resin to achieve toughness, chemical resistance, etc. Design/methodology/approach To study curing reaction, the curing agent AFAFFC is syn…
Abstract Dry granular flows are characterized as quasi‐static, dense and collisional states by the interactions among the grains, which is indexed macroscopically by an internal variable, called the order parameter defined as the square root of the static pressure to the total pressure. The solid–fluid state transitio…