Mesoscopic Electronics in Solid State Nanostructures
Thomas Heinzel John Wiley & Sons (2003), 342 pp. ISBN: 3-527-40375-2 $98 / $65 / €97.50
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Quasi-Static and Dynamic Compressive Behaviors of a S-2 Glass/SC15 Composite
A pulse-shaped split Hopkinson pressure bar (SHPB) was employed to determine the dynamic compressive mechanical responses and failure behaviors of a S-2 glass/SC15 composite along two perpendicular directions under valid dynamic testing conditions. The loading pulses in SHPB experiments were precisely controlled to en…
Ab initiocalculation of tensile strength in iron
A tensile test in ferromagnetic iron for loading in [001] and [111] directions is simulated by ab initio electronic structure calculations using all-electron full-potential linearized augmented-plane-wave method within the generalized gradient approximation. The theoretical tensile strengths and Young's moduli of ferr…
Annealing treatments to enhance thermal and mechanical stability of ultrafine-grained metals produced by severe plastic deformation
Ultrafine-grained (UFG) metals produced by techniques of severe plastic deformation, such as equal channel angular pressing (ECAP), exhibit extraordinary strength properties. However, in the as-ECAP-processed state, the heavily deformed microstructure of such UFG metals is rather unstable and is prone to undergo grain…
First Structurally Authenticated Zinc Alkylperoxide: A Model System for the Epoxidation of Enones
β-Ketoimine ligands stabilize zinc compounds: The dimeric zinc alkylperoxide [{(LL)ZnOOEt}2] (where LL=HC{(CMe)(2,6-iPr2C6H3N)}2) has been prepared and structurally characterized (see picture, Zn green, N blue, O red, C gray). This compound, which is formed by the insertion of dioxygen into the ZnEt bond, is very act…
Atomistic simulation of dislocation emission in nanosized grain boundaries
The present work deals with the atomic mechanism responsible for the emission of partial dislocations from grain boundaries (GB) in nanocrystalline metals. It is shown that, in a 12 nm grain-size sample, GBs containing grain-boundary dislocations (GBDs) can emit a partial dislocation during deformation by local atomic…
A study of the decomposition behaviour of 12-tungstophosphate heteropolyacid in solution
In this paper, the decomposition of H 3 PW 12 O 40 in aqueous solution or in mixed solutions of waterethanol or wateracetone is investigated by potentiometric titration and 31 P NMR. Identification of the products from H 3 PW 12 O 40 decomposition over a pH range of 112 was achieved using preparation high performan…
Strain relaxation in the epitaxy of La2/3Sr1/3MnO3grown by pulsed-laser deposition on SrTiO3(001)
With a Curie point at 370 K, the half-metal (La0.7Sr0.3)MnO3 (LSMO) is one of the most interesting candidates for electronic devices based on tunnel magnetoresistance. SrTiO3 (STO) is up to now the best substrate for the epitaxy of suitable thin films of LSMO. The pseudocubic unit cell of rhombohedral LSMO has a param…
Preparation of Crosslinked Chitosan/Silk Fibroin Blend Films for Drug Delivery System
Abstract Crosslinked chitosan/silk fibroin blend films were prepared by a solution casting technique using glutaraldehyde as crosslinking agent. Drug release characteristics of the blend films with various blend compositions were investigated. Theophylline, diclofenac sodium, amoxicillin trihydrate, and salicylic acid…
Principles of Surface Physics
Friedhelm Bechstedt Springer-Verlag (2003), 346 pp. ISBN: 3-540-00635-4 $89.95 / $56 / €79.95
Dispersion and Solubilization of Carbon Nanotubes
Carbon nanotubes are generally insoluble in any solvents, resulting in their poor processability for many proposed potential applications. Several strategies have been developed to introduce carbon nanotubes into solvent systems, including dispersion and suspension under special experimental conditions and the chemica…
Comparison of Laboratory Methodologies to Evaluate Corrosion Inhibitors for Oil and Gas Pipelines
Experiments were carried out using a loop in three fields (gassy-oil, oily-gas, and oil-transmission pipes) under 17 operating conditions, using six inhibitors (three continuous and three batch). Laboratory experiments were carried out under field conditions using the same inhibitors at the same concentrations. Four t…
(Bi 1/2 Na 1/2 )TiO 3 –Ba(Cu 1/2 W 1/2 )O 3 Lead‐Free Piezoelectric Ceramics
(Bi 1/2 Na 1/2 )TiO 3 with 0–6 mol% Ba(Cu 1/2 W 1/2 )O 3 (BNT‐BCW), a new member of the BNT‐based group, has been prepared following the conventional mixed oxide route. The compacted bodies were sintered at 1130°C for 2 h to get dense ceramics. The addition of BCW into BNT ceramics facilitated the poling process becau…
Effect of Ultrasound on Adsorption and Desorption Processes
The following paper is aimed at finding the effects of ultrasound on adsorption/desorption processes. Experiments concerning the ultrasonic power input indicate that particles absorb ultrasonic energy effectively if they are in resonance with the ultrasound. The ultrasonic energy is dissipated into heat. Hence, desorp…
Absorption and Emission Spectra of Ce3+ in Elpasolite Lattices
The experimental determination of the electronic energy levels for Ce(3+) in some chloroelpasolite hosts for both the ground 4f(1) and the excited 5d(1) configurations is described. High-resolution f-f absorption and f-(2)T(2g) d absorption and emission spectra have been recorded at low temperatures for Ce(3+) diluted…
Controlling molecular conformation of regenerated wild silk fibroin by aqueous ethanol treatment
Abstract Regenerated Antheraea pernyi silk fibroin film was prepared by dissolution of native silk fiber in aqueous lithium thiocyanate. The influence of aqueous ethanol treatment of the dried regenerated film on molecular conformation was studied by X‐ray diffraction, infrared spectroscopy, differential scanning calo…
Improved Efficacy of Stem Cell Labeling for Magnetic Resonance Imaging Studies by the Use of Cationic Liposomes
Labeling stem cells with FDA-approved superparamagnetic iron oxide particles makes it possible to track cells in vivo with magnetic resonance imaging (MRI), but high intracellular levels of iron can cause free radical formation and cytotoxicity. We hypothesized that the use of cationic liposomes would increase labelin…
A Covalent Tetrathiafulvalene–Tetracyanoquinodimethane Diad: Extremely Low HOMO–LUMO Gap, Thermoexcited Electron Transfer, and High‐Quality Langmuir–Blodgett Films
Nearly 30 years after theoretical prediction, a stable and well-characterized compound that covalently links tetrathiafulvalene and tetracyanoquinodimethane fragments has been synthesized (1, see scheme). The extremely low HOMO–LUMO gap of 1 (0.17 eV) allows the first observation of thermoexcited electron transfer in…
Computation of very fast transient overvoltages in transformer windings
The paper deals with the computation of very fast transient overvoltages (VFTOs) in transformer windings. For this purpose, an algorithm is developed. The applied algorithm uses a hybrid model which is a combination of the multi-conductor transmission line model (MTLM) and the single-transmission line model (STLM). By…
Fracture behavior of core‐shell rubber–modified clay‐epoxy nanocomposites
Abstract Morphology and fracture mechanisms in two nanoclay‐filled epoxy systems were investigated using both microscopy and spectroscopy tools. Clay exfoliation was achieved using a series of sample preparation steps, and confirmed using wide angle X‐ray diffraction (XRD) and transmission electron microscopy (TEM) te…