Materials Literature
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After surface modification of γ-Al2O3 nanoparticles with a silane coupling agent, styrene was graftcopolymerized onto γ-Al2O3 nanoparticles using a simultaneous γ-ray irradiation technique. The influence of the irradiation dose and the grafting kinetics were investigated in detail. Polypropylene nanocomposites were fa…
Controlling the appearance of crystal polymorphs of pharmaceuticals is essential in developing robust large-scale crystallization processes in the pharmaceutical industry. This review describes many of the thermodynamic and kinetic factors that are important for controlling crystal polymorphism and discusses recent ad…
This paper is concerned specifically with the growth and development of pitting on mild steel surfaces under anaerobic conditions, that is, when sufficient corrosion product has built-up under marine immersion conditions for the corrosion environment at the rust-metal interface to have become anaerobic. Recent detaile…
Electronic structures of LaNi5-xCox (x = 0, 0.5, 1) hydrogen-storage alloy were studied theoretically using the method of total energy based on the density functional theory (DFT). The plane wave function was selected as the basis set in combination with the ultrasoft pseudopotential technology. Crystal structure, ene…
A novel approach for preparing hierarchical porous nickel structures has been developed. It is an aqueous processing of the template, macroporous silicon, which was etched in HF solution to have straight channels. By immersion in a prepared nickel solution, the silicon sidewalls were replaced by nickel deposits to for…
A Commentary on the paper ”Response times and voltages for PDLC shutters„, by Bao‐Gang Wu, John H. Erdman and J. William Doane. First published in Liquid Crystals, 5, 1453‐1465 (1989).
Abstract Activated carbon particles were obtained by a solvatation method and added as fillers in cellulose triacetate as polymeric matrix. Various composite films were prepared by solvent casting at different controlled temperature and relative humidity (35–55° C, 10–70% RH) conditions, for three different filler loa…
Purpose To develop new eco‐environmentally friendly surface treatments based on cerate compounds as alternatives to the process involving toxic chromates for the corrosion protection of magnesium alloys. Design/methodology/approach A treatment process in which a surface was alkaline‐etched prior to ceria treatment is…
We investigated the differences between the decanethiolate gold nanoparticles synthesized by two different routes: one-phase and two-phase methods. Their properties were compared in bulk and at the air-water interface by transmission electron microscopy (TEM), X-ray reflectivity (XR), extended X-ray absorption fine st…
Wholly aromatic rod-rod type di- and triblock molecules, oligo(ether sulfone)-b-oligo(ether ketone)s (OES-OEK), were synthesized to study a solid-state self-assembled nanostructure. The OES and OEK segments in the block molecules form segregated crystalline domains. The energy-filtering transmission electron microscop…
Power electronics system is generally comprised of electrical and magnetic circuits. Nowadays, there were a lot of research works on circuit topologies ranging from single switch converter to soft-switching topologies, but the most difficult problems encountered by many design engineers were magnetic issues, such as c…
Polycrystalline cubic silicon carbide layers, undoped and codoped with nitrogen and boron, have been grown via thermal decomposition of methyltrichlorosilane vapor in hydrogen, and their transport properties (electrical conductivity, thermoelectric power, and thermal conductivity) have been studied in the temperature…
Indium-zinc oxide (IZO) films were grown on glass substrates by rf magnetron sputtering using targets of 50mol% In2O3–50mol% In2O3(ZnO)3 and In2ZnkOk+3 (k=3, 4, 5, and 7) at room temperature and 300°C. The difference in Zn content between the films and the sputter targets varied with the growth temperature. The struct…
Four new pregnane glycosides, tenacigenosides A–D (1–4), along with six known pregnane aglycones and five known pregnane glycosides, were isolated from the stems of Marsdenia tenacissima (Roxb.) Wight et Arn. (Asclepiadaceae). The chemical structures of the new compounds were established by 1D- and 2D-NMR as well as H…
The corrosion rate of copper produced by lithium bromide (LiBr) concentrated solutions of 400 g/L and 700 g/L (4.61 M and 8.06 M) at room temperature, 70°C, and 110°C was studied using immersion testing. The corroded copper concentration was determined with two techniques: weight loss and differential pulse polarograp…
The surface friction property changes of nonwovens under repetitive abrasions were observed. Surface data were acquired using a three-dimensional noncontact camera and fractal dimensions were calculated to evaluate surface roughness. The fractal dimension showed a tendency to increase with the number of abrasions. The…
Accuracy and resolution of scanning electron microscopy and an electron-beam lithography system directly depend on beam diameter; it should be monitored and tuned frequently. A technique is described to determine beam size using an automatic procedure. In the developed method, a specially designed and fabricated test…
Purpose To develop a method for the preparation of multi‐walled carbon nanotube reinforced low density polyethylene (LDPE) composites (MWNTs/LDPE), based on ultrasonic vibration, solution casting and melt mixing. Design/methodology/approach The preparation for MWNTs/LDPE composites was carried out by vibration of carb…
This work investigates the influence of sensitization conditions on pitting corrosion resistance of ferritic stainless steel UNS S43000 aged at 800°C between 10 min and 320 min. UNS S43000 steel is susceptible to intergranular corrosion after solution treatment at 1,160°C followed by water-quenching, as a consequence…
It is shown from both a phenomenological study and exact modeling that the reason for the experimentally observed substantial (a few angstroms or nanometers) separation in wavelength between the maxima of the inside (negative numbered) and outside (positive numbered) diffraction orders of a multilayer-coated grating,…