Materials Literature
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Single-walled carbon nanotubes are damaged by low-energy electron and photon irradiation, depending strongly on the diameter. In this study, the formation and healing of the irradiation-induced defects were found to be in competition during irradiation even at room temperature or below. The diameter dependence of the…
The erosion of tungsten and carbon marker layers was studied in the outer divertor of ASDEX Upgrade. The outer strike point area and a large fraction of the outer baffle are net erosion areas for both materials. The net erosion rate of carbon is about 10–20 times larger than the net erosion rate of tungsten. The erosi…
In Brief Liposomes are composed of phospholipids, the basic components of human cell walls. Liposome encapsulation improves a medication's bioavailability, which can extend treatment effects and reduce drug dosing. The therapeutic advantages of liposomal drug delivery, such as the ability of long-circulating liposomes…
Hybrid Density functional calculations have been carried out for Au 10 , Au 10 -H 2 O, Au 10 -O 2 , and Au 10 -H 2 O-O 2 model clusters. The results show that all the Au 10 clusters examined have a weak interaction with H 2 O and neutral and negatively charged Au10 clusters have a weak interaction with O 2 . Moreover,…
Various parameters of dosimetric interest such as mass attenuation coefficients, effective atomic numbers and electron densities of some commonly used solvents such as acetonitrile (C(4)H(3)N), butanol (C(4)H(9)OH), chlorobenzene (C(6)H(5)Cl), diethylether (C(4)H(10)O), ethanol (C(2)H(5)OH), methanol (CH(3)OH), propan…
The effect of introducing a network of distributor channels in a nanoporous catalyst pellet was studied. The diffusivity in the distributor channels is orders of magnitude larger than in the nanoporous material itself. Introduction of distributor channels leads to an increasing volume-averaged diffusivity but a decrea…
Abstract The effect of reactive compatibilization on the mechanical properties of nanosilica filled polypropylene (PP) composites was studied in this work. First, the nanoparticles were grafted with poly(glycidyl methacrylate) (PGMA) by solution free‐radical polymerization, and then melt blended together with PP matri…
A novel transflective liquid crystal display architecture and its system driving schemes are proposed. In the reflective mode, the ambient light is used to readout the displayed images. While in the transmissive mode, a color-sequential light emitting diode backlight is used to eliminate the color filters. Under such…
Spatial control over the distribution and the aggregation of arginine-glycine-aspartate (RGD) peptides at the nanoscale significantly affects cell responses. For example, nanoscale clustering of RGD peptides can induce integrins to cluster, thus triggering complete cell signaling. Dendrimers have a unique, highly bran…
The action of pyridoxal hydrochloric (PXA) and pyridoxol hydrochloride (PXO) on the corrosion of mild steel in hydrochloride acid (HCl) solution was studied using the weight loss and gasometry methods. The percentage inhibition efficiencies increase with the concentration of the inhibitors and decrease with increase i…
Two gold‐base active metal brazes (gold‐ABA and gold‐ABA‐V) were evaluated for oxidation resistance to 850°C, and used to join yttria‐stabilized zirconia (YSZ) to a corrosion‐resistant ferritic stainless steel for possible use in solid oxide fuel cells. Thermogravimetric analysis and optical microscopy and scanning el…
The local order around Mn atoms in the Mn-implanted Si samples, with ferromagnetic properties, has been investigated by use of x-ray-absorption spectroscopy techniques. Analysis of both extended x-ray-absorption fine structure and x-ray absorption near-edge structure spectra clearly indicates that Mn ions are located…
By the end of September 2006, the engineering commissioning of the Experimental Advanced Superconducting Tokamak (EAST) was completed and the first H 2 plasma was achieved with stainless steel as the plasma-facing material (PFM). In the following phases, with gradual increase in the heating power, the EAST divertor ta…
The quenching of the luminescence originating from the excited states 3P0 and 1D2 of Pr3+ and 5D3 and 5D4 of Tb3+ has been studied in oxide crystals containing closed shell transition metal ions, such as titanates, vanadates, niobates, and tantalates. It has been shown that the emission from these excited states can b…
Blood-pool MRI contrast agents have enormous potential to aid sensitive magnetic resonance detection and yield definitive diagnostic data of cancer and diseases of the cardiovascular system. Many attempts have been initiated to design macromolecular gadolinium (Gd[III]) complexes as magnetic resonance imaging blood-po…
A water-soluble amphiphilic poly(phenylacetylene) bearing the bulky aza-18-crown-6-ether pendants forms a one-handed helix induced by l- or d-amino acids and chiral amino alcohols through specific host-guest interactions in water. We now report that such an induced helical poly(phenylacetylene) with a controlled helix…
Abstract Management of moisture penetration and hydrolytic degradation of polylactide (PLA) is extremely important during manufacturing, shipping, storage, and end-use of PLA products. Crystallinity in PLA was measured with Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD). Moisture sorption isotherm…
Os aços inoxidáveis dúplex ferríticos-austeníticos fazem parte de uma classe de materiais com microestrutura bifásica, composta por uma matriz ferrítica e ilhas de austenita, com frações volumétricas aproximadamente iguais dessas fases. Essa classe de materiais é caracterizada por apresentar interessante combinação de…
A new method for measuring the multiple parameters of a twisted nematic liquid crystal (TNLC) by applying a genetic algorithm is presented. This paper adopts an electrooptic modulator to modulate the linear polarized light which passed through a TNLC cell in a heterodyne polarimetric setup. The intensity ratio and the…
Indentation-induced shape memory and superelastic effects are recently discovered thermo-mechanical behaviors that may find important applications in many areas of science and engineering. Theoretical understanding of these phenomena is challenging because both martensitic phase transformation and slip plasticity exis…