Materials Literature
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High Strength Stainless Steels (HSSS) are being developed with the aim to improve corrosion resistance of prestressed concrete structures in aggressive environments. In the present paper focus is given to mechanical and corrosion performance of a HSSS type 14301. The ability of passivation in alkaline media and the ri…
采用1-羧甲基-3-甲基咪唑氯化盐离子液体对钠化蒙脱土进行插层改性，然后用苯胺的盐酸溶液进行二次插层，以过硫酸铵为氧化剂，盐酸溶液为掺杂剂，使进入离子液体/蒙脱土(CMMIm/MMT)层间的苯胺(An)发生氧化聚合反应，制备了一种具有良好导电性的聚苯胺/离子液体/蒙脱土复合材料(PANI/CMMIm/MMT).用红外光谱、X-射线衍射，热重分析和DSC对样品进行了表征.结果表明当离子液体/蒙脱土用量为7.5%、盐酸浓度为1 mol/L、过硫酸铵与苯胺的摩尔比为1∶1、0℃下反应6 h时制备的PANI/CMMIm/MMT纳米复合材料电导率最高，达到了0.3 S/cm，是相同条件下聚苯胺/钠化蒙脱土纳米复合材料电导率的2.5倍，聚苯胺…
This paper provides an approach based on the monitoring of life cycle performance of concrete bridges exposed to chlorides, and demonstrates its application in a case study. It is first shown that some of the data, which are commonly used by engineers as input values into service life prediction models, can be differe…
Previous letters and articles in this Journal have described methods for finding the pressure of CO 2 inside carbonated beverages. One communication in particular describes a method for estimating this pressure without even opening the container. This communication describes yet another method, using a combination of…
A recent paper by Zinin [Phys. Rev. E 79, 021910 (2009)] regarding the dynamics of biological cells in an acoustic field draws conclusions that we find open to debate. The present paper examines these conclusions and addresses some findings.
As-fabricated free-standing indium foils were found to have transmission in the 90nm to 120nm band ranging from 10% to 70% of modeled values based on pure indium. Auger depth profiling of the as-deposited indium showed little surface contamination and high purity. However, final freestanding filters were found to have…
Abstract Polymer/fullerene bulk heterojunction solar cells consisting of PDDTP:PCBM blends have been investigated and optimized. The structural properties of the photoactive layers were studied by GID‐XRD, which revealed a pronounced response of photovoltaic parameters on the polymer crystallinity. In addition to P3HT…
The polarization mechanism of a microporous SiO2-based solid electrolyte is developed and three polarizations (electric double layer formation, ionic relaxation and dipole relaxation) are identified. The polarization response of the microporous SiO2-based solid electrolyte is optimized by tuning the deposition tempera…
Partial discharges are a major source of insulation failure in electric power transformers. Their detection can be achieved through the associated acoustic emissions, and this work reports on the investigation of a fibre laser sensor based on a phase-shifted chirped fibre grating for acoustic emission detection in the…
The cell adhesion extracellular matrix (ECM), and the cell adhesive system mediate various adhesion molecules. Cell adhesion regulates proliferation and differentiation. However, the cell adhesive systems between titanium and epithelial cells are still not clearly understood. In this study, we cultured human epithelia…
The feasibility of an alternative fuel cell architecture, called a ribbon membrane electrode assembly (MEA), is demonstrated for low-temperature polymer electrolyte membrane (PEM) fuel cells used in portable power applications by comparing it to a traditional bipolar “stack” architecture. A ribbon MEA consists of adja…
Volume Phase Holographic Gratings (VPHGs) are dispersing elements which are finding wide spread in modern optical instrumentations, also in the astronomical field. Since photochromic materials show a change in the refractive index (Δn) upon photoirradiation, in principle they can be conveniently applied to produce rew…
Abstract A Small Punch Test method with 3 mm diameter and 0.5 mm thick specimens was utilized to characterize 3003-H14 aluminum, 2618-T61 aluminum, and Ti-6Al-4V alloys. The method was found to be repeatable and the effect of surface roughness negligible within the range of 0.450–3.011 μm. In addition, the titanium ha…
The photoluminescence (PL) intensity enhancement and suppression mechanism on surface plasmons (SPs) coupling with InGaN/GaN quantum wells (QWs) have been systematically studied. The SP-QW coupling behaviors in the areas of GaN cap layer coated with silver thin film were compared at different temperatures and excitati…
Volume phase holographic gratings (VPHGs) are becoming fundamental dispersing elements in astronomical instrumentation. Here it will be described the efficiency behavior of such dispersing elements at high diffraction orders for understanding the possible use as echelle gratings. The efficiency is calculated based on…
Computational methods are needed to help characterize the structure and function of protein-protein complexes. To develop and improve such methods, standard test problems are essential. One important test is to identify experimental structures from among large sets of decoys. Here, a flexible docking procedure was use…
Abstract We present a model for cuprate superconductivity based on the identification of an experimentally detected “local superconductor” as a charge 2 fermion pairing in a circular, stationary density wave. This wave acts like a highly correlated local “boson” satisfying a modified Cooper problem with additional cor…
Abstract This work presents a new technique for reaction kinetic studies of liquid phase reactions in a CSTR. By simultaneously varying the reaction temperature (temperature scanning—TS) and reactant feed concentration (composition modulation—CM) while recording the output concentration, the technique allows, through…
Under a U.S. Army program, PCI has developed autothermal reforming catalysts for E85 to provide stable performance in the presence of fuel sulfur as well as corrosion inhibitors. The catalysts build on PCI’s Microlith™ catalyst technology and used PCI’s proprietary formulations. A stable performance was demonstrated t…
Abstract In this study, we report on the synthesis and characterization of photoreactive polymers bearing N‐acetylcarbazole and N‐formylcarbazole groups, respectively. These polymers were easily accessible by polymer analogous acylation of commercially available poly‐(2‐vinylcarbazole). While poly(1‐(2‐vinyl‐9H‐carbaz…