Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Thin Films of (Ba 0.5 , Sr 0.5 ) TiO 3 have been deposited on quartz substrates by RF magnetron sputtering. The percentage of oxygen in sputtering atmosphere was varied between 25 to 100%. The as-deposited films were x-ray amorphous and crystallized on post deposition annealing at 900°C for 1 min. Microstructure as de…
The inhibition of the corrosion of mild steel in 2M hydrochloric acid solutionsby Pyridoxol hydrochloride (PXO) has been studied using weight loss and hydrogenevolution techniques. The inhibitor (PXO) exhibited highest inhibition efficiency of71.93% at the highest inhibitor concentration of 1.0 x 10 -2 M investigated…
Copper nanorods have been synthesized by electrodeposition with different lengths in porous polycarbonate (PCT) membranes with a pore diameter of 50 nm and a thickness of 4 µm. The PCT membranes were dissolved in dichloromethane (CH 2 Cl 2 ) and the solvent was replaced by methanol solutions. Extinction peaks at 587,…
Abstract In this work, we report the first observation of unique hierarchical six‐fold rotational symmetrical vanadium oxide based nanocomposite synthesized by a simple chemical route and highlight the first observation of a morphotropic reconstructive phase transistion from a lamellar V 2 O 5 to that of a single crys…
Abstract The present work reports the studies of the solubilization of single‐wall carbon nanotubes in aqueous solutions of calix[4]resorcinarene derivatives and p‐sulfonato‐calix[ n ]arenes ( n = 4, 6) modified by alkyl (butyl and dodecyl) substituents. The highest dispersion ability is demonstrated by calix[4]resoci…
Resistance distributions for the reset state in phase-change-memory arrays are studied as a function of the programming conditions. The statistical distribution displays a low-resistance tail, which may potentially affect the resistance window between the two states in the memory device. The majority of tail cells are…
Local transport properties of a carbon nanotube (CNT) thin-film transistor (TFT) have been investigated by conducting atomic force microscopy. The current in a CNT bundle is almost constant, whereas it drastically decreases at the contacts between CNTs. Current drops at the contacts are reduced with increasing negativ…
Real-time photoelectron spectroscopy and in situ electrical measurements have been applied to the formation of Al contacts on p-type diamond. At 294K, an initially uniform Al film induces band bending in the diamond consistent with the measured (current-voltage) barrier height of 1.05V. The temperature-induced transit…
Depending on the starting equilibrium temperature, the application of a magnetic field on a sample of Ni–Mn–Sn produces sample heating or cooling during adiabatic experiments. The competition between endothermal and exothermal effects is observed close to the martensite-to-austenite magnetostructural phase transition.…
Electrospinning: The big world of small fibers Similar to the nuclear age, the so-called nano-age is coming; the growing gap between nano haves and nano have-nots, however, will remain, as has global competition, particularly from the electrospinning technology. More than seventy years after the discovery of the princ…
Abstract A nanoindentation system fitted with a fluid cell has been used to probe the influence of water on the nanoindentation creep response of commercial Nylon‐6 samples. Measurements on samples taken while immersed in deionized water were compared with measurements under usual ambient (∼ 50% relative humidity) con…
Abstract A palladium‐TPPTS catalyst heterogenized on KF/alumina has been shown to be effective and recyclable for the selective formation of monooctadienylxylopyranosides via the telomerization of butadiene with D ‐xylose. Copyright © 2007 John Wiley & Sons, Ltd.
The transient light emission from the dielectric barrier discharges (DBDs) in cellular polypropylene ferroelectrets subjected to high electric poling fields was spectroscopically measured. The spectrum shows strong emission from the second positive system of molecular nitrogen, N2(CΠu3)→N2(BΠg3), and the first negativ…
Abstract We demonstrate that water filling has a significant, tube‐diameter dependent effect on the effective mass density of individual single‐walled carbon nanotubes suspended in aqueous suspension. On the basis of extensive molecular dynamics simulations of water‐filled carbon nanotubes we have estimated the number…
Recent work has demonstrated the strong qualitative differences between the dynamics near a glass transition driven by short-ranged repulsion and one governed by short-ranged attraction. Here we study in detail the behavior of nonlinear, higher-order correlation functions that measure the growth of length scales assoc…
We have developed an experimental technique that allows us to study the physics of short lived molecular dianions in the gas phase. It is based on the formation of monoanions via electrospray ionization, acceleration of these ions to keV energies, and subsequent electron capture in a sodium vapor cell. The dianions ar…
Using molecular dynamics simulations, we studied the air flow through carbon nanotube arrays. We found that for 1.4nm diameter tubes separated by 25nm, the air flow can be well described by the free molecular flow theory. We estimate that for such array, the pressure gradient is about 0.1atm∕μm at 1atm air pressure an…
Abstract We present Raman spectroscopy on carbon nanotubes, functionalized with alkyl groups to different degrees and with different addition reactions. We observe effects in particular on the intensities of the radial breathing mode (RBM). From the RBM we can assign the diameter and chiral indices of the tubes and st…
We investigated the properties of a Ge–Bi–Te ternary chalcogenide thin film which was deposited on a SiO 2 /Si substrate by varying RF-sputtering power on the GeTe and Bi target. The aim was to search for an appropriate candidate for a new phase change memory. Various analyses are conducted in order to investigate the…
Mg–Cu–Zn ferrites can be sintered at T ≤950°C to sufficient density and display adequate permeability profiles for application in multilayer ferrite inductors. The permeability and Curie temperature have to be optimized by proper selection of composition. Ferrites with <50 mol% Fe 2 O 3 reveal enhanced densificatio…