Materials Literature
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Abstract Diagenesis in the Cretaceous and Tertiary sediments of the Alava Block (Basque- Cantabrian basin) has been studied using the clay mineralogy (X-ray diffraction) of cuttings from three representative wells of a N—S cross-section. More than 5500 m of various lithologies (marls, mudstones and sandstones) have be…
Abstract Wettability of soil affects a wide variety of processes in soils like infiltration, percolation, preferential flow, and surface runoff. Even though efforts have been made to determine contact angles and surface tension or energy of smooth surfaces, the determination on granular materials like soil particles r…
Density functional and ab initio methods have been used to study the mechanisms for key dynamic processes of the experimentally known S4-symmetric [16]annulene (1a). Using BH&HLYP/6-311+G** and B3LYP/6-311+G**, we located two viable stepwise pathways with computed energy barriers (Ea = 8-10 kcal/mol) for conformationa…
The preparation, properties, and application in adriamycin delivery ofbiocompatible and biodegradable poly(lactide-co-glycolide)-polyethylene glycol (PLGA-PEG) nanoparticles are discussed. PLGA-PEG copolymers were synthesized by ring opening polymerization of the dl-lactide and glycolide in the presence of PEG1000. 1H…
In this study, the interaction of undoped ZnO films with (NH4)2Sx treatment have been investigated by x-ray photoelectron spectroscopy, photoluminescence, optical transmittance, and four-point probe. According to the experimental results, we find that the formation of Zn–S bonds and the reduction of oxygen vacancies (…
A hydrazine-based process for solution-depositing phase-change materials (PCMs) is demonstrated, using KSb 5 S 8 (KSS) as an example. The process involves dissolving the elemental metals and chalcogen in hydrazine at room temperature and spin-coating the solution onto a substrate, followed by a short low-temperature (…
Optical microscopy (OM) and atomic force microscopy (AFM) were used to investigate the effect of liquid−liquid phase separation (LLPS) on the lamellar crystal morphology in a statistical copolymer blend of poly(ethylene- co -hexene) (PEH) and poly(ethylene- co -butene) (PEB). The quench depth and the time of liquid−li…
Abstract This paper examines the effects of shear stress on the structural parameters that define the ‘crystallinity’ of graphite. The results show that highly crystalline graphite samples ground for up to 120 min do not undergo detectable changes in the three-dimensional arrangement of carbon layers but crystallite s…
There is a need to be able to quickly test materials and mixtures in-place, under real traffic. There have been many developments during the last few years that need verification prior to adopting. One such development is the new proposed mechanistic pavement design procedure. Another is the development of proposed pe…
OBJECTIVE: Mitoxantrone (MTZ) has potent in vitro activity against malignant glioma cell lines, but it cannot be used effectively as a systemic agent for the treatment of brain tumors because of its poor central nervous system penetration. However, MTZ-loaded poly(lactide-co-glycolide) (PLGA) microspheres may be injec…
Ferroelectric thin films offer the possibility of engineering the dielectric response for tunable components in frequency-agile rf and microwave devices. However, this approach often leads to an undesired temperature sensitivity. Compositionally graded ferroelectric films have been explored as a means of redressing th…
Abstract The structural properties of GaSe have been investigated up to 38 GPa by monochromatic X‐ray diffraction. The onset of the phase transition from the ε ‐GaSe to a disordered NaCl‐type structural motif is observed near 21 GPa. Using the experimentally determined lattice parameters of the layered ε ‐phase as inp…
George Marsh investigates the growing use of composites in aircraft jet engines.
Piezoresponse scanning force microscopy (PFM) has turned into an established technique for imaging ferroelectric domains in ferroelectric thin films. At least for soft cantilevers, the piezoresponse signal is not only dependent on the elastic properties of the material under investigation but also on the elastic prope…
This paper presents a new group of features used for partial discharge (PD) pattern recognition, based on the description of detail and statistical characteristics of PD images by using fractal features and statistical parameters, respectively. An improved differential box-counting method is proposed for fractal dimen…
This paper discusses the device physics of carbon nanotube field-effect transistors (CNTFETs). After reviewing the status of device technology, we use results of our numerical simulations to discuss the physics of CNTFETs emphasizing the similarities and differences with traditional FETs. The discussion shows that our…
The paper describes an algorithm for the generation of random packings of ellipsoids of revolution, which is a natural generalization of an older algorithm for the case of spherical particles and belongs to the class of collective rearrangement algorithms. It yields packings with a broad spectrum of densities and geom…
Abstract Summary: The comfort in wear of textiles has been studied extensively on the level of textile construction. The influence of the fibre material is present in the experience of textile consumers, but objective assessment is rather difficult. Some recent works are reviewed here. TENCEL® is a man‐made cellulosic…
During transport or the storage, galvanized steel products undergo wet storage stain phenomenon, leading to the formation of an extensive white rust of zinc. The corrosion products are mainly zinc layered hydroxides salts of which allow several intercalation or coprecipitation reactions allowing the easy absorption of…
Conducting polyaniline (PANI) has been synthesized using Sol-gel technique with chemical oxidation process. Chemically prepared cadmium sulphide has been printed on pellet of conducting polyaniline using screen-printing technique. I-V characteristics of conducting polyaniline and CdS printed conducting polyaniline hav…